Fuel Supply System

Abstract

A fuel supply system according to the present invention is a fuel supply system that vaporizes mixed-fuel to be supplied to a power generation system, and includes a condenser that condenses steam transferred from a turbine of the power generation system, a storage tank in which the mixed-fuel is liquefied and stored, a vaporizer that vaporizes the mixed-fuel transferred from the storage tank, and a first line that passes through the condenser and the vaporizer, wherein heat exchange water is transferred via the first line and heated by the condenser, and the vaporizer vaporizes the mixed-fuel with the heat exchange water heated by the condenser, and supplies the mixed-fuel vaporized by the vaporizer to the power generation system.

Description

[Technical field]

[0001] The present invention relates to a fuel supply system for supplying multi-fuel combustion to a power generation system. [Background technology]

[0002] As global warming worsens, efforts are being made around the world to reduce greenhouse gas emissions. In particular, as the 1997 Kyoto Protocol, which mandated greenhouse gas reductions for developed countries, expires in 2020, the 195 countries that signed the Paris Climate Change Accord, which was adopted at the 21st United Nations Climate Change Convention held in Paris, France in December 2015 and came into effect in November 2016, are making various efforts to reduce greenhouse gas emissions.

[0003] In thermal power generation systems, fossil fuels are mainly used as fuel for boilers. When fossil fuels used in boilers are burned, not only fine dust, SOx, and NOx but also greenhouse gases are emitted. In recent years, technology has been developed to reduce greenhouse gas emissions by burning fossil fuels together with gases such as ammonia. Summary of the Invention [Means for solving the problem]

[0004] A fuel supply system according to the present invention is a fuel supply system that vaporizes mixed-fuel to be supplied to a power generation system, and includes a condenser that condenses steam transferred from a turbine of the power generation system, a storage tank in which the mixed-fuel is liquefied and stored, a vaporizer that vaporizes the mixed-fuel transferred from the storage tank, and a first line that passes through the condenser and the vaporizer, wherein heat exchange water is transferred via the first line and heated by the condenser, and the vaporizer vaporizes the mixed-fuel with the heat exchange water heated by the condenser, and supplies the mixed-fuel vaporized by the vaporizer to the power generation system.

[0005] Alternatively, as described in claim 1, the present invention includes a second line and a third line connected to the storage tank, the second line transporting the mixed-fuel in a liquid state to the vaporizer, and the third line transporting the mixed-fuel evaporated in the storage tank, and supplying the mixed-fuel vaporized in the vaporizer and the mixed-fuel transported via the third line to the power generation system.

[0006] Alternatively, the system may include a fourth line that transports the mixed-fuel vaporized in the vaporizer, and a first heater that is arranged between the vaporizer and a boiler of the power generation system, the first line including a first branch line that is arranged rearward of the condenser and transports at least a portion of the heat exchange water heated in the condenser to the first heater, and the first heater heats the mixed-fuel transported via the fourth line.

[0007] Alternatively, the heating element may include a second heater disposed behind the first heater.

[0008] Alternatively, the third line passes through a third heater, and the co-combustion fuel transferred through the third line is heated by the third heater.

[0009] Alternatively, the third line transports the co-fuel vaporized in the storage tank to the vaporizer.

[0010] Alternatively, the system may include a fourth line that transports the mixed-fuel vaporized in the vaporizer, and a first heater that is arranged between the vaporizer and a boiler of the power generation system, the first line including a first branch line that is arranged rearward of the condenser and transports at least a portion of the heat exchange water heated in the condenser to the first heater, and the first heater heats the mixed-fuel transported via the fourth line.

[0011] Alternatively, the fuel storage tank may include a fourth line that transfers the mixed fuel vaporized in the vaporizer to a first accumulator, and the third line is connected to the fourth line to transfer the mixed fuel vaporized in the storage tank to the fourth line. Effect of the Invention

[0012] According to the embodiment of the present invention having such a configuration, there is an effect of reducing energy because seawater is used to heat the co-fuel, and there is also an effect of saving the co-fuel because the co-fuel evaporated in the storage tank is used as fuel for the boiler. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a conceptual diagram of a conventional power generation system using multi-fuel combustion. [Diagram 2] 1 is a conceptual diagram showing a power generation system according to the present invention. [Diagram 3] 1 is a conceptual diagram showing a power generation system according to a first embodiment of the present invention. [Figure 4] FIG. 4 is a conceptual diagram showing a power generation system according to a second embodiment of the present invention. [Diagram 5] FIG. 11 is a conceptual diagram showing a power generation system according to a third embodiment of the present invention. [Figure 6] FIG. 11 is a conceptual diagram showing a power generation system according to a fourth embodiment of the present invention. [Figure 7] FIG. 11 is a conceptual diagram showing a power generation system according to a fifth embodiment of the present invention. [Figure 8] FIG. 13 is a conceptual diagram showing a power generation system according to a sixth embodiment of the present invention. [Figure 9] FIG. 13 is a conceptual diagram showing a power generation system according to a seventh embodiment of the present invention. [Figure 10] FIG. 13 is a conceptual diagram showing a power generation system according to an eighth embodiment of the present invention. [Figure 11] FIG. 13 is a conceptual diagram showing a power generation system according to a ninth embodiment of the present invention. [Figure 12] FIG. 23 is a conceptual diagram showing a power generation system according to a tenth embodiment of the present invention. [Figure 13] 1 is a graph showing the annual distribution of seawater temperatures in the Samcheok region of the Republic of Korea. [Figure 14] FIG. 21 is a conceptual diagram showing a power generation system according to an eleventh embodiment of the present invention. [Figure 15] FIG. 23 is a conceptual diagram showing a power generation system according to a twelfth embodiment of the present invention. [Figure 16] FIG. 23 is a conceptual diagram showing a power generation system according to a thirteenth embodiment of the present invention. [Figure 17] FIG. 23 is a conceptual diagram showing a power generation system according to a fourteenth embodiment of the present invention. [Figure 18] FIG. 23 is a conceptual diagram showing a power generation system according to a fifteenth embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Prior to the detailed description of the present invention, the terms and words used in the present specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, but should be interpreted as meanings and concepts that correspond to the technical ideas of the present invention, in accordance with the principle that the inventor can appropriately define the concepts of terms in order to best describe his / her invention. Therefore, it should be understood that the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and do not fully represent the technical ideas of the present invention, and therefore there may be various equivalents and modifications that can replace them at the time of filing the present invention.

[0015] In the following description, the singular includes the plural unless the context clearly indicates otherwise. It should be understood that the terms "comprise" and "comprise" specify the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but do not preclude the presence or additional possibility of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0016] In addition, in the following description, expressions such as upper, top, lower, bottom, side, front, back, etc. are based on the direction shown in the drawings, and it should be made clear in advance that the expressions may differ if the direction of the corresponding object is changed.

[0017] Furthermore, in the present specification and claims, terms including ordinal numbers such as "first", "second", etc. may be used to distinguish between components. Such ordinal numbers are used to distinguish between identical or similar components, and the meaning of a term should not be construed as being limited by the use of such ordinal numbers. For example, components combined with such ordinal numbers should not be construed as being limited in the order of use or arrangement by the numbers. If necessary, each ordinal number may be used interchangeably.

[0018] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. However, the concept of the present invention is not limited to the embodiments shown. For example, a person skilled in the art who understands the concept of the present invention can propose other embodiments that fall within the scope of the concept of the present invention by adding, changing, or deleting components, and such embodiments are also within the scope of the concept of the present invention. In the drawings, the shapes and sizes of elements may be exaggerated for clearer explanation.

[0019] FIG. 2 is a conceptual diagram showing a power generation system according to the present invention.

[0020] The power generation system according to the present invention may include a boiler 30, a turbine, a condenser 40, and a fuel supply system. Each individual component may be connected by a plurality of pipes, each pipe may be connected to each other, and each pipe may have a branch pipe. The branch pipe may be connected to another pipe. When connecting pipes to each other or connecting pipes to each component, pressure reduction or pressure adjustment may be required, but since the technology related to this is known, detailed description thereof will be omitted below.

[0021] The boiler 30, the turbine, and the condenser 40 may be connected by a sixth line 6000. Fluids used for power generation may travel to the boiler 30, the turbine, and the condenser 40 via the sixth line 6000. The term line may refer to a path through which a fluid travels, rather than a single pipe.

[0022] The boiler 30 can heat a fluid by burning fuel. The fluid heated by the boiler 30 may be water. The boiler 30 can generate steam by burning fuel. In this case, the steam may be water vapor. The boiler 30 can burn a fossil fuel. The boiler 30 can burn a mixed fuel in which two or more types of fuel are mixed. In this case, the fossil fuel input to the boiler 30 may be a fossil fuel used in conventional technology, such as coal or oil. The mixed fuel mixed with the fossil fuel may be ammonia or hydrogen. That is, the boiler 30 can burn ammonia or hydrogen, excluding a portion of the conventional fossil fuel. Since a portion of the fossil fuel burned in the boiler 30 is removed, the amount of carbon dioxide generated by combustion can be reduced compared to the case of burning only fossil fuel.

[0023] The steam generated in the boiler 30 may be transferred along a sixth line 6000 to a turbine. The turbine may be a steam turbine. The turbine may use the steam transferred via the sixth line 6000 to rotate blades. The rotation of the blades may cause a generator to produce electricity.

[0024] The steam transferred to the turbine may be transferred to the condenser 40 via a sixth line 6000. The condenser 40 may condense the fluid from steam to a liquid. The condenser 40 may include a low-temperature heat source. The energy of the steam may be transferred to the low-temperature heat source of the condenser 40. The latent heat of the steam may be transferred to the low-temperature heat source of the condenser 40. The low-temperature heat source of the condenser 40 may be a fluid flowing through a pipe. The low-temperature heat source of the condenser 40 may be heat exchange water flowing through a pipe. The low-temperature heat source of the condenser 40 may be heat exchange water flowing through a first line 1000. The heat exchange water flowing through the first line 1000 may be seawater.

[0025] The fluid condensed in the condenser 40 may be pressurized by a pump and transferred again to the boiler 30. The fluid transferred to the boiler 30 may be circulated through a sixth line 6000 and used to generate electricity.

[0026] The fuel supply system may include a storage tank 10, a carburetor 20, a first accumulator, a first line 1000, a second line 2000, a third line 3000, a fourth line 4000 and a fifth line 5000.

[0027] The storage tank 10 can store the mixed fuel. The storage tank 10 can store the liquefied mixed fuel. The mixed fuel can be burned in the boiler 30. The mixed fuel can be burned in the boiler 30 together with the fossil fuel. The mixed fuel may be ammonia, for example.

[0028] The storage tank 10 may be connected to a second line 2000. The second line 2000 may transport the mixed fuel in a liquid state stored in the storage tank 10. The second line 2000 may be connected to the vaporizer 20. The second line 2000 may transport the mixed fuel in a liquid state stored in the storage tank 10 to the vaporizer 20.

[0029] The storage tank 10 may be connected to the third line 3000. The third line 3000 may be disposed on the upper part of the storage tank 10. The third line 3000 may transport the multi-fuel stored in the storage tank 10 in a gaseous state. The third line 3000 may transport the multi-fuel evaporated in the storage tank 10. The third line 3000 may be connected to the first accumulator. The third line 3000 may transport the multi-fuel evaporated in the storage tank 10 from the storage tank 10 to the first accumulator.

[0030] The first line 1000 may transport heat exchange water. The heat exchange water may be seawater. The first line 1000 may be connected to the condenser 40 and the vaporizer 20. The heat exchange water transported through the first line 1000 may pass through the condenser 40 and the vaporizer 20. The heat exchange water transported through the first line 1000 may pass through the condenser 40 and the vaporizer 20 in sequence.

[0031] The heat exchange water may be heated in the condenser 40. The heat exchange water may absorb heat in the condenser 40. The heat absorbed by the heat exchange water in the condenser 40 may be heat generated from steam condensed in the condenser 40 after passing through the turbine. Heat may be transferred to the heat exchange water from steam transferred through the sixth line 6000 in the condenser 40. The heat exchange water may release heat in the evaporator 20. The heat released by the heat exchange water in the evaporator 20 may be heat transferred in the condenser 40.

[0032] The vaporizer 20 may vaporize the mixed fuel. The vaporizer 20 may vaporize the mixed fuel using the heat exchange water flowing through the first line 1000 as a high-temperature heat source. The first line 1000 may pass through the vaporizer 20. The vaporizer 20 may be connected to the second line 2000. The second line 2000 may transfer the mixed fuel stored in the storage tank 10 to the vaporizer 20. The mixed fuel transferred through the second line 2000 may be vaporized in the vaporizer 20. The vaporizer 20 may vaporize the mixed fuel using the heat exchange water heated in the condenser 40 as a high-temperature heat source. The mixed fuel vaporized in the vaporizer 20 may be transferred to the first accumulator through the fourth line 4000.

[0033] The first accumulator can transfer the transferred mixed fuel in a vapor state to the boiler. Since the technology related to the first accumulator is a known technology, the description of the structure, the operation principle, etc. of the first accumulator can be omitted. The first accumulator can be connected to the third line 3000. The mixed fuel evaporated in the storage tank 10 can be transferred to the first accumulator through the third line 3000. The first accumulator can be connected to the fourth line 4000. The fourth line 4000 can transfer the mixed fuel vaporized in the vaporizer 20 to the first accumulator. The first accumulator can be connected to the fifth line 5000. The fifth line 5000 can transfer the mixed fuel in a gas state from the first accumulator to the boiler 30.

[0034] According to the power generation system, since the heat exchange water heated in the condenser 40 is used as a high-temperature heat source for the vaporizer 20, there is an effect of reducing the energy used for the vaporizer 20. In addition, since the mixed fuel evaporated in the storage tank 10 is used as fuel for the boiler 30, there is an effect of reducing the amount of mixed fuel used.

[0035] First Embodiment 3 is a conceptual diagram showing a power generation system according to a first embodiment of the present invention. In the following, a description of the same parts as those in the power generation system described above may be omitted, and differences will be mainly described.

[0036] The fuel supply system may include a storage tank 10, a vaporizer 20, a first accumulator, a first line 1000, a second line 2000, a third line 3000, a fourth line 4000, a fifth line 5000, a first heater 210, a second heater 220 and a third heater 230.

[0037] The storage tank 10 can store the mixed fuel. The storage tank 10 can store the liquefied mixed fuel. The mixed fuel can be burned in the boiler 30. The mixed fuel can be burned in the boiler 30 together with the fossil fuel. The mixed fuel may be ammonia, for example.

[0038] The storage tank 10 may be connected to a second line 2000. The second line 2000 may transport the liquid-state mixed fuel stored in the storage tank 10. The second line 2000 may be connected to the vaporizer 20. The second line 2000 may transport the liquid-state mixed fuel stored in the storage tank 10 to the vaporizer 20.

[0039] The storage tank 10 may be connected to the third line 3000. The third line 3000 may be disposed on the upper part of the storage tank 10. The third line 3000 may transport the multi-fuel stored in the storage tank 10 in a gaseous state. The third line 3000 may transport the multi-fuel evaporated in the storage tank 10. The third line 3000 may be connected to the first accumulator. The third line 3000 may transport the multi-fuel evaporated in the storage tank 10 from the storage tank 10 to the first accumulator.

[0040] The first line 1000 may transport heat exchange water. The heat exchange water may be seawater. The first line 1000 may be connected to the condenser 40 and the vaporizer 20. The heat exchange water transported through the first line 1000 may pass through the condenser 40 and the vaporizer 20. The heat exchange water transported through the first line 1000 may pass through the condenser 40 and the vaporizer 20 in sequence.

[0041] The heat exchange water may be heated in the condenser 40. The heat exchange water may absorb heat in the condenser 40. The heat absorbed by the heat exchange water in the condenser 40 may be heat generated from steam that passes through the turbine and is condensed in the condenser 40. Heat may be transferred to the heat exchange water from steam transferred through the sixth line 6000 in the condenser 40. The heat exchange water may release heat in the evaporator 20. The heat released by the heat exchange water in the evaporator 20 may be heat transferred in the condenser 40.

[0042] The first line 1000 may include a first branch line 1100. In the first line 1000, if the side where the heat exchange water flows into the condenser 40 is the front side of the condenser 40 and the side where the heat exchange water flows out from the condenser 40 is the rear side of the condenser 40, the first branch line 1100 may be disposed rearward of the condenser 40. The first branch line 1100 may be connected to the first line 1000 rearward of the condenser 40. The first branch line 1100 may be connected to the first line 1000 between the condenser 40 and the vaporizer 20. The first branch line 1100 may pass through the first heater 210. The heat exchange water may pass through the first heater 210 through the first branch line 1100. At least a portion of the heat exchange water heated in the condenser 40 may pass through the first heater 210 through the first branch line 1100. The heat exchange water heated in the condenser 40 can release heat in the first heater 210. The heat exchange water heated in the condenser 40 can heat the multi-fuel mixture in the first heater 210.

[0043] The vaporizer 20 may vaporize the mixed fuel. The vaporizer 20 may vaporize the mixed fuel using the heat exchange water flowing through the first line 1000 as a high-temperature heat source. The first line 1000 may pass through the vaporizer 20. The vaporizer 20 may be connected to the second line 2000. The second line 2000 may transfer the mixed fuel stored in the storage tank 10 to the vaporizer 20. The mixed fuel transferred through the second line 2000 may be vaporized in the vaporizer 20. The vaporizer 20 may vaporize the mixed fuel using the heat exchange water heated in the condenser 40 as a high-temperature heat source. The mixed fuel vaporized in the vaporizer 20 may be transferred to the first accumulator through the fourth line 4000.

[0044] The first heater 210 may be disposed between the vaporizer 20 and the first accumulator. The first heater 210 may heat the mixed fuel vaporized in the vaporizer 20. The high-temperature heat source of the first heater 210 may be heat exchange water heated in the condenser 40. The heat exchange water passing through the first heater 210 via the first branch line 1100 may be the high-temperature heat source of the first heater 210.

[0045] The second heater 220 may be disposed between the first heater 210 and the first accumulator. The second heater 220 may reheat the co-fuel heated by the first heater 210. The high-temperature heat source of the second heater 220 may be an independent heat source. The high-temperature heat source of the second heater 220 may be, for example, a heating element using electrical energy, or may be, for example, hot water or steam.

[0046] The third heater 230 may heat the mixed fuel evaporated in the storage tank 10. The third heater 230 may heat the mixed fuel transferred to the first accumulator via the third line 3000. The high-temperature heat source of the third heater 230 may be an independent heat source. The high-temperature heat source of the third heater 230 may be, for example, a heating element using electrical energy, or may be, for example, hot water or steam.

[0047] The fourth line 4000 may transfer the mixed fuel evaporated in the vaporizer 20 to the first accumulator. The fourth line 4000 may connect the vaporizer 20 and the first accumulator. The fourth line 4000 may pass through the first heater 210 and the second heater 220 disposed between the vaporizer 20 and the first accumulator.

[0048] The first accumulator may be connected to a third line 3000. The mixed fuel evaporated in the storage tank 10 may be transferred to the first accumulator via the third line 3000. The first accumulator may be connected to a fourth line 4000. The fourth line 4000 may transfer the mixed fuel evaporated in the vaporizer 20 to the first accumulator. The first accumulator may be connected to a fifth line 5000. The fifth line 5000 may transfer the mixed fuel in a gaseous state from the first accumulator to the boiler 30.

[0049] According to the power generation system, since the heat exchange water heated in the condenser 40 is used as a high-temperature heat source for the vaporizer 20 and the first heater 210, there is an effect of reducing the energy used in the vaporizer 20 and the first heater 210. When seawater is used as the heat exchange water, the seawater that absorbs heat in the condenser 40 releases heat in the vaporizer 20 and the first heater 210 and is released back into the sea, so that thermal pollution of the sea can be prevented. In addition, since the mixed fuel evaporated in the storage tank 10 is used as fuel for the boiler 30, there is an effect of reducing the amount of mixed fuel used.

[0050] <Second embodiment> 4 is a conceptual diagram showing a power generation system according to a second embodiment of the present invention. In the following, a description of the same parts as those in the power generation system described above may be omitted, and differences will be mainly described.

[0051] The fuel supply system may include a storage tank 10, a vaporizer 20, a first accumulator, a first line 1000, a second line 2000, a third line 3000, a fourth line 4000, a fifth line 5000, a first heater 210 and a second heater 220.

[0052] The storage tank 10 can store the mixed fuel. The storage tank 10 can store the liquefied mixed fuel. The mixed fuel can be burned in the boiler 30. The mixed fuel can be burned in the boiler 30 together with the fossil fuel. The mixed fuel may be ammonia, for example.

[0053] The storage tank 10 may be connected to a second line 2000. The second line 2000 may transport the liquid-state mixed fuel stored in the storage tank 10. The second line 2000 may be connected to the vaporizer 20. The second line 2000 may transport the liquid-state mixed fuel stored in the storage tank 10 to the vaporizer 20.

[0054] The storage tank 10 may be connected to the third line 3000. The third line 3000 may be disposed on the upper portion of the storage tank 10. The third line 3000 may transport the mixed fuel stored in the storage tank 10 in a gaseous state. The third line 3000 may transport the mixed fuel evaporated in the storage tank 10. One end of the third line 3000 may be connected to the storage tank 10, and the other end of the third line 3000 may be connected to the vaporizer 20. The third line 3000 may transport the mixed fuel evaporated in the storage tank 10 from the storage tank 10 to the vaporizer 20. The mixed fuel transported to the vaporizer 20 via the second line 2000 and the third line 3000 may be heated in the vaporizer 20. In this case, the high-temperature heat source for heating the mixed fuel transported to the vaporizer 20 via the third line 3000 may be heat exchange water heated in the condenser 40.

[0055] The first line 1000 may transport heat exchange water. The heat exchange water may be seawater. The first line 1000 may be connected to the condenser 40 and the vaporizer 20. The heat exchange water transported through the first line 1000 may pass through the condenser 40 and the vaporizer 20. The heat exchange water transported through the first line 1000 may pass through the condenser 40 and the vaporizer 20 in sequence.

[0056] The heat exchange water may be heated in the condenser 40. The heat exchange water may absorb heat in the condenser 40. The heat absorbed by the heat exchange water in the condenser 40 may be heat generated from steam that passes through the turbine and is condensed in the condenser 40. Heat may be transferred to the heat exchange water from steam transferred through the sixth line 6000 in the condenser 40. The heat exchange water may release heat in the evaporator 20. The heat released by the heat exchange water in the evaporator 20 may be heat transferred in the condenser 40.

[0057] The first line 1000 may include a first branch line 1100. In the first line 1000, if the side where the heat exchange water flows into the condenser 40 is the front side of the condenser 40 and the side where the heat exchange water flows out from the condenser 40 is the rear side of the condenser 40, the first branch line 1100 may be disposed rearward of the condenser 40. The first branch line 1100 may be connected to the first line 1000 rearward of the condenser 40. The first branch line 1100 may be connected to the first line 1000 between the condenser 40 and the vaporizer 20. The first branch line 1100 may pass through the first heater 210. The heat exchange water may pass through the first heater 210 through the first branch line 1100. At least a portion of the heat exchange water heated in the condenser 40 may pass through the first heater 210 through the first branch line 1100. The heat exchange water heated in the condenser 40 can release heat in the first heater 210. The heat exchange water heated in the condenser 40 can heat the multi-fuel mixture in the first heater 210.

[0058] The vaporizer 20 may vaporize the mixed fuel. The vaporizer 20 may vaporize the mixed fuel using the heat exchange water flowing through the first line 1000 as a high-temperature heat source. The first line 1000 may pass through the vaporizer 20. The vaporizer 20 may be connected to the second line 2000. The second line 2000 may transfer the mixed fuel stored in the storage tank 10 to the vaporizer 20. The mixed fuel transferred through the second line 2000 may be vaporized in the vaporizer 20. The vaporizer 20 may vaporize the mixed fuel using the heat exchange water heated in the condenser 40 as a high-temperature heat source. The mixed fuel vaporized in the vaporizer 20 may be transferred to the first accumulator through the fourth line 4000.

[0059] The first heater 210 may be disposed between the vaporizer 20 and the first accumulator. The first heater 210 may heat the mixed fuel vaporized in the vaporizer 20. The high-temperature heat source of the first heater 210 may be heat exchange water heated in the condenser 40. The heat exchange water passing through the first heater 210 via the first branch line 1100 may be the high-temperature heat source of the first heater 210.

[0060] The second heater 220 may be disposed between the first heater 210 and the first accumulator. The second heater 220 may reheat the co-fuel heated by the first heater 210. The high-temperature heat source of the second heater 220 may be an independent heat source. The high-temperature heat source of the second heater 220 may be, for example, a heating element using electrical energy, or may be, for example, hot water or steam.

[0061] The fourth line 4000 may transfer the mixed fuel evaporated in the vaporizer 20 to the first accumulator. The fourth line 4000 may connect the vaporizer 20 and the first accumulator. The fourth line 4000 may pass through the first heater 210 and the second heater 220 disposed between the vaporizer 20 and the first accumulator.

[0062] The first accumulator may be connected to a fourth line 4000. The fourth line 4000 may transfer the mixed fuel vaporized in the vaporizer 20 to the first accumulator. The first accumulator may be connected to a fifth line 5000. The fifth line 5000 may transfer the mixed fuel in a gaseous state from the first accumulator to the boiler 30.

[0063] According to the power generation system, since the heat exchange water heated in the condenser 40 is used as a high-temperature heat source for the vaporizer 20 and the first heater 210, there is an effect of reducing the energy used in the vaporizer 20 and the first heater 210. When seawater is used as the heat exchange water, the seawater that absorbs heat in the condenser 40 releases heat in the vaporizer 20 and the first heater 210 and is released back into the sea, so that thermal pollution of the sea can be prevented. In addition, since the mixed fuel evaporated in the storage tank 10 is used as fuel for the boiler 30, there is an effect of reducing the amount of mixed fuel used.

[0064] <Third embodiment> 5 is a conceptual diagram showing a power generation system according to a third embodiment of the present invention. In the following, a description of the same parts as those in the power generation system described above may be omitted, and differences will be mainly described.

[0065] The fuel supply system may include a storage tank 10, a vaporizer 20, a first accumulator, a first line 1000, a second line 2000, a third line 3000, a fourth line 4000, a fifth line 5000, a first heater 210 and a second heater 220.

[0066] The storage tank 10 can store the mixed fuel. The storage tank 10 can store the liquefied mixed fuel. The mixed fuel can be burned in the boiler 30. The mixed fuel can be burned in the boiler 30 together with the fossil fuel. The mixed fuel may be ammonia, for example.

[0067] The storage tank 10 may be connected to a second line 2000. The second line 2000 may transfer the mixed fuel stored in the storage tank 10 in a liquid state. The second line 2000 may be connected to the vaporizer 20. The second line 2000 may transfer the mixed fuel stored in the storage tank 10 to the vaporizer 20 in a liquid state.

[0068] The storage tank 10 may be connected to the third line 3000. The third line 3000 may be disposed on the upper part of the storage tank 10. The third line 3000 may transfer the mixed fuel stored in the storage tank 10 in a gaseous state. The third line 3000 may transfer the mixed fuel evaporated in the storage tank 10. The third line 3000 may be connected to the fourth line 4000. The third line 3000 may transfer the mixed fuel evaporated in the storage tank 10 from the storage tank 10 to the fourth line 4000. The mixed fuel transferred to the fourth line 4000 via the third line 3000 may be mixed with the mixed fuel evaporated in the vaporizer 20.

[0069] The first line 1000 may transport heat exchange water. The heat exchange water may be seawater. The first line 1000 may be connected to the condenser 40 and the vaporizer 20. The heat exchange water transported through the first line 1000 may pass through the condenser 40 and the vaporizer 20. The heat exchange water transported through the first line 1000 may pass through the condenser 40 and the vaporizer 20 in sequence.

[0070] The heat exchange water may be heated in the condenser 40. The heat exchange water may absorb heat in the condenser 40. The heat absorbed by the heat exchange water in the condenser 40 may be heat generated from steam that passes through the turbine and is condensed in the condenser 40. Heat may be transferred to the heat exchange water from steam transferred through the sixth line 6000 in the condenser 40. The heat exchange water may release heat in the evaporator 20. The heat released by the heat exchange water in the evaporator 20 may be heat transferred in the condenser 40.

[0071] The first line 1000 may include a first branch line 1100. In the first line 1000, if the side where the heat exchange water flows into the condenser 40 is the front side of the condenser 40 and the side where the heat exchange water flows out from the condenser 40 is the rear side of the condenser 40, the first branch line 1100 may be disposed rearward of the condenser 40. The first branch line 1100 may be connected to the first line 1000 rearward of the condenser 40. The first branch line 1100 may be connected to the first line 1000 between the condenser 40 and the vaporizer 20. The first branch line 1100 may pass through the first heater 210. The heat exchange water may pass through the first heater 210 through the first branch line 1100. At least a portion of the heat exchange water heated in the condenser 40 may pass through the first heater 210 through the first branch line 1100. The heat exchange water heated in the condenser 40 can release heat in the first heater 210. The heat exchange water heated in the condenser 40 can heat the multi-fuel mixture in the first heater 210.

[0072] The vaporizer 20 may vaporize the mixed fuel. The vaporizer 20 may vaporize the mixed fuel using the heat exchange water flowing through the first line 1000 as a high-temperature heat source. The first line 1000 may pass through the vaporizer 20. The vaporizer 20 may be connected to the second line 2000. The second line 2000 may transfer the mixed fuel stored in the storage tank 10 to the vaporizer 20. The mixed fuel transferred through the second line 2000 may be vaporized in the vaporizer 20. The vaporizer 20 may vaporize the mixed fuel using the heat exchange water heated in the condenser 40 as a high-temperature heat source. The mixed fuel vaporized in the vaporizer 20 may be transferred to the first accumulator through the fourth line 4000.

[0073] The first heater 210 may be disposed between the vaporizer 20 and the first accumulator. The first heater 210 may heat the mixed fuel vaporized in the vaporizer 20. The high-temperature heat source of the first heater 210 may be heat exchange water heated in the condenser 40. The heat exchange water passing through the first heater 210 via the first branch line 1100 may be the high-temperature heat source of the first heater 210.

[0074] The second heater 220 may be disposed between the first heater 210 and the first accumulator. The second heater 220 may reheat the co-fuel heated by the first heater 210. The high-temperature heat source of the second heater 220 may be an independent heat source. The high-temperature heat source of the second heater 220 may be, for example, a heating element using electrical energy, or may be, for example, hot water or steam.

[0075] The fourth line 4000 may transfer the mixed fuel evaporated in the vaporizer 20 to the first accumulator. The fourth line 4000 may transfer the mixed fuel transferred via the third line 3000 to the first accumulator. The fourth line 4000 may connect the vaporizer 20 and the first accumulator. The fourth line 4000 may pass through the first heater 210 and the second heater 220 disposed between the vaporizer 20 and the first accumulator.

[0076] The first accumulator may be connected to a fourth line 4000. The fourth line 4000 may transfer the mixed fuel vaporized in the vaporizer 20 to the first accumulator. The first accumulator may be connected to a fifth line 5000. The fifth line 5000 may transfer the mixed fuel in a gaseous state from the first accumulator to the boiler 30.

[0077] According to the power generation system, the heat exchange water heated in the condenser 40 is used as a high-temperature heat source for the vaporizer 20 and the first heater 210, which has the effect of reducing the energy used in the vaporizer 20. When seawater is used as the heat exchange water, the seawater that absorbs heat in the condenser 40 releases the heat in the vaporizer 20 and the first heater 210 and is released back into the sea, which prevents thermal pollution of the sea. In addition, the mixed fuel evaporated in the storage tank 10 is used as fuel for the boiler 30, which has the effect of reducing the amount of mixed fuel used.

[0078] <Fourth embodiment> 6 is a conceptual diagram showing a power generation system according to a fourth embodiment of the present invention. In the following, a description of the same parts as those in the power generation system described above may be omitted, and differences will be mainly described.

[0079] The fuel supply system may include a low pressure storage tank 100 (or storage tank), a first pump 110, a first compressor 120, a carburetor 20, a first accumulator, a first line 1000, a second line 2000, a third line 3000, a fourth line 4000, a fifth line 5000, a first heater 210, a second heater 220 and a third heater 230.

[0080] The low pressure storage tank 100 (or storage tank) can store the mixed fuel. The low pressure storage tank 100 (or storage tank) can store the liquefied mixed fuel. The mixed fuel can be combusted in the boiler 30. The mixed fuel can be combusted in the boiler 30 together with the fossil fuel. The mixed fuel may be ammonia, as an example.

[0081] The low pressure storage tank 100 (or storage tank) may be connected to the second line 2000. The second line 2000 may transport the mixed fuel stored in the low pressure storage tank 100 (or storage tank) in a liquid state. The second line 2000 may be connected to the vaporizer 20. The second line 2000 may transport the mixed fuel stored in the low pressure storage tank 100 (or storage tank) in a liquid state to the first pump 110 and then to the vaporizer 20. The second line 2000 may transport the mixed fuel stored in the low pressure storage tank 100 (or storage tank) in a liquid state to the vaporizer 20.

[0082] The low pressure storage tank 100 (or storage tank) may be connected to the third line 3000. The third line 3000 may be disposed on the upper portion of the low pressure storage tank 100 (or storage tank). The third line 3000 may transport the mixed fuel stored in the low pressure storage tank 100 (or storage tank) in a gaseous state. The third line 3000 may transport the mixed fuel evaporated in the low pressure storage tank 100 (or storage tank). The third line 3000 may be connected to the third heater 230. The third line 3000 may transport the mixed fuel evaporated in the low pressure storage tank 100 (or storage tank) from the low pressure storage tank 100 (or storage tank) to the first compressor 120 and then to the first accumulator.

[0083] The first pump 110 can pressurize the liquid-state mixed fuel transferred from the low-pressure storage tank 100 (or a storage tank). The first pump 110 can be disposed on the second line 2000. The liquid-state mixed fuel pressurized by the first pump 110 can be transferred to the vaporizer 20 via the second line 2000.

[0084] The first compressor 120 may compress the mixed fuel evaporated in the low pressure storage tank 100 (or a storage tank). The first compressor 120 may be disposed on the third line 3000. The mixed fuel compressed by the first compressor 120 may be transferred to the first accumulator.

[0085] The first line 1000 may transport heat exchange water. The heat exchange water may be seawater. The first line 1000 may be connected to the condenser 40 and the vaporizer 20. The heat exchange water transported through the first line 1000 may pass through the condenser 40 and the vaporizer 20. The heat exchange water transported through the first line 1000 may pass through the condenser 40 and the vaporizer 20 in sequence.

[0086] The heat exchange water may be heated in the condenser 40. The heat exchange water may absorb heat in the condenser 40. The heat absorbed by the heat exchange water in the condenser 40 may be heat generated from steam that passes through the turbine and is condensed in the condenser 40. Heat may be transferred to the heat exchange water from steam transferred through the sixth line 6000 in the condenser 40. The heat exchange water may release heat in the evaporator 20. The heat released by the heat exchange water in the evaporator 20 may be heat transferred in the condenser 40.

[0087] The first line 1000 may include a first branch line 1100. In the first line 1000, if the side where the heat exchange water flows into the condenser 40 is the front side of the condenser 40 and the side where the heat exchange water flows out from the condenser 40 is the rear side of the condenser 40, the first branch line 1100 may be disposed rearward of the condenser 40. The first branch line 1100 may be connected to the first line 1000 rearward of the condenser 40. The first branch line 1100 may be connected to the first line 1000 between the condenser 40 and the vaporizer 20. The first branch line 1100 may pass through the first heater 210. The heat exchange water may pass through the first heater 210 through the first branch line 1100. At least a portion of the heat exchange water heated in the condenser 40 may pass through the first heater 210 through the first branch line 1100. The heat exchange water heated in the condenser 40 can release heat in the first heater 210. The heat exchange water heated in the condenser 40 can heat the multi-fuel mixture in the first heater 210.

[0088] The vaporizer 20 may vaporize the mixed fuel. The vaporizer 20 may vaporize the mixed fuel using the heat exchange water flowing through the first line 1000 as a high-temperature heat source. The first line 1000 may pass through the vaporizer 20. The vaporizer 20 may be connected to the second line 2000. The second line 2000 may transfer the mixed fuel stored in the low-pressure storage tank 100 (or a storage tank) to the vaporizer 20. The mixed fuel transferred through the second line 2000 may be vaporized in the vaporizer 20. The vaporizer 20 may vaporize the mixed fuel using the heat exchange water heated by the condenser 40 as a high-temperature heat source. The mixed fuel vaporized in the vaporizer 20 may be transferred to the first accumulator through the fourth line 4000.

[0089] The first heater 210 may be disposed between the vaporizer 20 and the first accumulator. The first heater 210 may heat the mixed fuel vaporized in the vaporizer 20. The high-temperature heat source of the first heater 210 may be heat exchange water heated in the condenser 40. The heat exchange water passing through the first heater 210 via the first branch line 1100 may be the high-temperature heat source of the first heater 210.

[0090] The second heater 220 may be disposed between the first heater 210 and the first accumulator. The second heater 220 may reheat the co-fuel heated by the first heater 210. The high-temperature heat source of the second heater 220 may be an independent heat source. The high-temperature heat source of the second heater 220 may be, for example, a heating element using electrical energy, or may be, for example, hot water or steam.

[0091] The third heater 230 may heat the mixed fuel evaporated in the low pressure storage tank 100 (or the storage tank). The third heater 230 may heat the mixed fuel transferred to the first accumulator via the third line 3000. The high temperature heat source of the third heater 230 may be an independent heat source. The high temperature heat source of the third heater 230 may be, for example, a heating element using electrical energy, or may be, for example, hot water or steam.

[0092] The fourth line 4000 may transfer the mixed fuel evaporated in the vaporizer 20 to the first accumulator. The fourth line 4000 may connect the vaporizer 20 and the first accumulator. The fourth line 4000 may pass through the first heater 210 and the second heater 220 disposed between the vaporizer 20 and the first accumulator.

[0093] The first accumulator may be connected to a fourth line 4000. The fourth line 4000 may transfer the mixed fuel vaporized in the vaporizer 20 to the first accumulator. The first accumulator may be connected to a fifth line 5000. The fifth line 5000 may transfer the mixed fuel in a gaseous state from the first accumulator to the boiler 30.

[0094] According to the power generation system, the heat exchange water heated in the condenser 40 is used as a high-temperature heat source for the vaporizer 20 and the first heater 210, which has the effect of reducing the energy used in the vaporizer 20. When seawater is used as the heat exchange water, the seawater that absorbs heat in the condenser 40 releases the heat in the vaporizer 20 and the first heater 210 and is released back into the sea, which prevents thermal pollution of the sea. In addition, the mixed fuel evaporated in the low-pressure storage tank 100 (or the storage tank) is used as fuel for the boiler 30, which has the effect of reducing the amount of mixed fuel used.

[0095] <Fifth embodiment> 7 is a conceptual diagram showing a power generation system according to a fifth embodiment of the present invention. In the following, a description of the same parts as those in the power generation system described above may be omitted, and differences will be mainly described.

[0096] The fuel supply system may include a low pressure storage tank 100 (or storage tank), a first pump 110, a first compressor 120, a carburetor 20, a first accumulator, a first line 1000, a second line 2000, a third line 3000, a fourth line 4000, a fifth line 5000, a first heater 210, and a second heater 220.

[0097] The low pressure storage tank 100 (or storage tank) can store the mixed fuel. The low pressure storage tank 100 (or storage tank) can store the liquefied mixed fuel. The mixed fuel can be combusted in the boiler 30. The mixed fuel can be combusted in the boiler 30 together with the fossil fuel. The mixed fuel may be ammonia, as an example.

[0098] The low pressure storage tank 100 (or storage tank) may be connected to the second line 2000. The second line 2000 may transport the mixed fuel stored in the low pressure storage tank 100 (or storage tank) in a liquid state. The second line 2000 may be connected to the vaporizer 20. The second line 2000 may transport the mixed fuel stored in the low pressure storage tank 100 (or storage tank) in a liquid state to the first pump 110 and then to the vaporizer 20. The second line 2000 may transport the mixed fuel stored in the low pressure storage tank 100 (or storage tank) in a liquid state to the vaporizer 20.

[0099] The low pressure storage tank 100 (or storage tank) may be connected to the third line 3000. The third line 3000 may be disposed on the upper portion of the low pressure storage tank 100 (or storage tank). The third line 3000 may transport the mixed fuel stored in the low pressure storage tank 100 (or storage tank) in a gaseous state. The third line 3000 may transport the mixed fuel evaporated in the storage tank 10. One end of the third line 3000 may be connected to the storage tank 10, and the other end of the third line 3000 may be connected to the vaporizer 20. The third line 3000 may transport the mixed fuel evaporated in the low pressure storage tank 100 (or storage tank) from the low pressure storage tank 100 (or storage tank) to the first compressor 120, and then to the vaporizer 20. The mixed fuel transported to the vaporizer 20 via the third line 3000 may be heated in the vaporizer 20. In this case, the heat source for heating the mixed fuel transferred to the vaporizer 20 via the third line 3000 can be heat exchange water heated in the condenser 40 .

[0100] The first pump 110 can pressurize the liquid-state mixed fuel transferred from the low-pressure storage tank 100 (or a storage tank). The first pump 110 can be disposed on the second line 2000. The liquid-state mixed fuel pressurized by the first pump 110 can be transferred to the vaporizer 20 via the second line 2000.

[0101] The first compressor 120 may compress the mixed fuel evaporated in the low pressure storage tank 100 (or a storage tank). The first compressor 120 may be disposed on the third line 3000. The mixed fuel compressed by the first compressor 120 may be transferred to the vaporizer.

[0102] The first line 1000 may transport heat exchange water. The heat exchange water may be seawater. The first line 1000 may be connected to the condenser 40 and the vaporizer 20. The heat exchange water transported through the first line 1000 may pass through the condenser 40 and the vaporizer 20. The heat exchange water transported through the first line 1000 may pass through the condenser 40 and the vaporizer 20 in sequence.

[0103] The heat exchange water may be heated in the condenser 40. The heat exchange water may absorb heat in the condenser 40. The heat absorbed by the heat exchange water in the condenser 40 may be heat generated from steam that passes through the turbine and is condensed in the condenser 40. Heat may be transferred to the heat exchange water from steam transferred through the sixth line 6000 in the condenser 40. The heat exchange water may release heat in the evaporator 20. The heat released by the heat exchange water in the evaporator 20 may be heat transferred in the condenser 40.

[0104] The first line 1000 may include a first branch line 1100. In the first line 1000, if the side where the heat exchange water flows into the condenser 40 is the front side of the condenser 40 and the side where the heat exchange water flows out from the condenser 40 is the rear side of the condenser 40, the first branch line 1100 may be disposed rearward of the condenser 40. The first branch line 1100 may be connected to the first line 1000 rearward of the condenser 40. The first branch line 1100 may be connected to the first line 1000 between the condenser 40 and the vaporizer 20. The first branch line 1100 may pass through the first heater 210. The heat exchange water may pass through the first heater 210 through the first branch line 1100. At least a portion of the heat exchange water heated in the condenser 40 may pass through the first heater 210 through the first branch line 1100. The heat exchange water heated in the condenser 40 can release heat in the first heater 210. The heat exchange water heated in the condenser 40 can heat the multi-fuel mixture in the first heater 210.

[0105] The vaporizer 20 may vaporize the mixed fuel. The vaporizer 20 may vaporize the mixed fuel using the heat exchange water flowing through the first line 1000 as a high-temperature heat source. The first line 1000 may pass through the vaporizer 20. The vaporizer 20 may be connected to the second line 2000. The second line 2000 may transfer the mixed fuel stored in the low-pressure storage tank 100 (or a storage tank) to the vaporizer 20. The mixed fuel transferred through the second line 2000 may be vaporized in the vaporizer 20. The vaporizer 20 may vaporize the mixed fuel using the heat exchange water heated by the condenser 40 as a high-temperature heat source. The mixed fuel vaporized in the vaporizer 20 may be transferred to the first accumulator through the fourth line 4000.

[0106] The first heater 210 may be disposed between the vaporizer 20 and the first accumulator. The first heater 210 may heat the mixed fuel vaporized in the vaporizer 20. The high-temperature heat source of the first heater 210 may be heat exchange water heated in the condenser 40. The heat exchange water passing through the first heater 210 via the first branch line 1100 may be the high-temperature heat source of the first heater 210.

[0107] The second heater 220 may be disposed between the first heater 210 and the first accumulator. The second heater 220 may reheat the co-fuel heated by the first heater 210. The high-temperature heat source of the second heater 220 may be an independent heat source. The high-temperature heat source of the second heater 220 may be, for example, a heating element using electrical energy, or may be, for example, hot water or steam.

[0108] The fourth line 4000 may transfer the mixed fuel evaporated in the vaporizer 20 to the first accumulator. The fourth line 4000 may connect the vaporizer 20 and the first accumulator. The fourth line 4000 may pass through the first heater 210 and the second heater 220 disposed between the vaporizer 20 and the first accumulator.

[0109] The first accumulator may be connected to a fourth line 4000. The fourth line 4000 may transfer the mixed fuel vaporized in the vaporizer 20 to the first accumulator. The first accumulator may be connected to a fifth line 5000. The fifth line 5000 may transfer the mixed fuel in a gaseous state from the first accumulator to the boiler 30.

[0110] According to the power generation system, the heat exchange water heated in the condenser 40 is used as a high-temperature heat source for the vaporizer 20 and the first heater 210, which has the effect of reducing the energy used in the vaporizer 20. When seawater is used as the heat exchange water, the seawater that absorbs heat in the condenser 40 releases the heat in the vaporizer 20 and the first heater 210 and is released back into the sea, which prevents thermal pollution of the sea. In addition, the mixed fuel evaporated in the low-pressure storage tank 100 (or the storage tank) is used as fuel for the boiler 30, which has the effect of reducing the amount of mixed fuel used.

[0111] Sixth Embodiment 8 is a conceptual diagram showing a power generation system according to a sixth embodiment of the present invention. In the following, a description of the same parts as those in the above-mentioned power generation system may be omitted, and differences may be mainly described.

[0112] The fuel supply system may include a low pressure storage tank 100 (or storage tank), a first pump 110, a first compressor 120, a carburetor 20, a first accumulator, a first line 1000, a second line 2000, a third line 3000, a fourth line 4000, a fifth line 5000, a first heater 210 and a second heater 220.

[0113] The low pressure storage tank 100 (or storage tank) can store the mixed fuel. The low pressure storage tank 100 (or storage tank) can store the liquefied mixed fuel. The mixed fuel can be combusted in the boiler 30. The mixed fuel can be combusted in the boiler 30 together with the fossil fuel. The mixed fuel may be ammonia, as an example.

[0114] The low pressure storage tank 100 (or storage tank) may be connected to the second line 2000. The second line 2000 may transport the mixed fuel stored in the low pressure storage tank 100 (or storage tank) in a liquid state. The second line 2000 may be connected to the vaporizer 20. The second line 2000 may transport the mixed fuel stored in the low pressure storage tank 100 (or storage tank) in a liquid state to the first pump 110 and then to the vaporizer 20. The second line 2000 may transport the mixed fuel stored in the low pressure storage tank 100 (or storage tank) in a liquid state to the vaporizer 20.

[0115] The low pressure storage tank 100 (or storage tank) may be connected to the third line 3000. The third line 3000 may be disposed on the upper part of the low pressure storage tank 100 (or storage tank). The third line 3000 may transport the mixed fuel stored in the low pressure storage tank 100 (or storage tank) in a gaseous state. The third line 3000 may transport the mixed fuel evaporated in the low pressure storage tank 100 (or storage tank). The third line 3000 may be connected to the fourth line 4000. The third line 3000 may transport the mixed fuel evaporated in the low pressure storage tank 100 (or storage tank) from the low pressure storage tank 100 (or storage tank) to the fourth line 4000. The mixed fuel transported to the fourth line 4000 via the third line 3000 may be mixed with the mixed fuel evaporated in the vaporizer 20.

[0116] The first pump 110 can pressurize the liquid-state mixed fuel transferred from the low-pressure storage tank 100 (or a storage tank). The first pump 110 can be disposed on the second line 2000. The liquid-state mixed fuel pressurized by the first pump 110 can be transferred to the vaporizer 20 via the second line 2000.

[0117] The first compressor 120 can compress the mixed fuel evaporated in the low pressure storage tank 100 (or a storage tank). The first compressor 120 can be disposed on the third line 3000. The mixed fuel compressed by the first compressor 120 can be transferred to the fourth line 4000.

[0118] The first line 1000 may transport heat exchange water. The heat exchange water may be seawater. The first line 1000 may be connected to the condenser 40 and the vaporizer 20. The heat exchange water transported through the first line 1000 may pass through the condenser 40 and the vaporizer 20. The heat exchange water transported through the first line 1000 may pass through the condenser 40 and the vaporizer 20 in sequence.

[0119] The heat exchange water may be heated in the condenser 40. The heat exchange water may absorb heat in the condenser 40. The heat absorbed by the heat exchange water in the condenser 40 may be heat generated from steam that passes through the turbine and is condensed in the condenser 40. Heat may be transferred to the heat exchange water from steam transferred through the sixth line 6000 in the condenser 40. The heat exchange water may release heat in the evaporator 20. The heat released by the heat exchange water in the evaporator 20 may be heat transferred in the condenser 40.

[0120] The first line 1000 may include a first branch line 1100. In the first line 1000, if the side where the heat exchange water flows into the condenser 40 is the front side of the condenser 40 and the side where the heat exchange water flows out from the condenser 40 is the rear side of the condenser 40, the first branch line 1100 may be disposed rearward of the condenser 40. The first branch line 1100 may be connected to the first line 1000 rearward of the condenser 40. The first branch line 1100 may be connected to the first line 1000 between the condenser 40 and the vaporizer 20. The first branch line 1100 may pass through the first heater 210. The heat exchange water may pass through the first heater 210 through the first branch line 1100. At least a portion of the heat exchange water heated in the condenser 40 may pass through the first heater 210 through the first branch line 1100. The heat exchange water heated in the condenser 40 can release heat in the first heater 210. The heat exchange water heated in the condenser 40 can heat the multi-fuel mixture in the first heater 210.

[0121] The vaporizer 20 may vaporize the mixed fuel. The vaporizer 20 may vaporize the mixed fuel using the heat exchange water flowing through the first line 1000 as a high-temperature heat source. The first line 1000 may pass through the vaporizer 20. The vaporizer 20 may be connected to the second line 2000. The second line 2000 may transfer the mixed fuel stored in the low-pressure storage tank 100 (or a storage tank) to the vaporizer 20. The mixed fuel transferred through the second line 2000 may be vaporized in the vaporizer 20. The vaporizer 20 may vaporize the mixed fuel using the heat exchange water heated by the condenser 40 as a high-temperature heat source. The mixed fuel vaporized in the vaporizer 20 may be transferred to the first accumulator through the fourth line 4000.

[0122] The first heater 210 may be disposed between the vaporizer 20 and the first accumulator. The first heater 210 may heat the mixed fuel vaporized in the vaporizer 20. The high-temperature heat source of the first heater 210 may be heat exchange water heated in the condenser 40. The heat exchange water passing through the first heater 210 via the first branch line 1100 may be the high-temperature heat source of the first heater 210.

[0123] The second heater 220 may be disposed between the first heater 210 and the first accumulator. The second heater 220 may reheat the co-fuel heated by the first heater 210. The high-temperature heat source of the second heater 220 may be an independent heat source. The high-temperature heat source of the second heater 220 may be, for example, a heating element using electrical energy, or may be, for example, hot water or steam.

[0124] The fourth line 4000 may transfer the mixed fuel evaporated in the vaporizer 20 to the first accumulator. The fourth line 4000 may connect the vaporizer 20 and the first accumulator. The fourth line 4000 may pass through the first heater 210 and the second heater 220 disposed between the vaporizer 20 and the first accumulator.

[0125] The first accumulator may be connected to a fourth line 4000. The fourth line 4000 may transfer the mixed fuel vaporized in the vaporizer 20 to the first accumulator. The first accumulator may be connected to a fifth line 5000. The fifth line 5000 may transfer the mixed fuel in a gaseous state from the first accumulator to the boiler 30.

[0126] According to the power generation system, the heat exchange water heated in the condenser 40 is used as a high-temperature heat source for the vaporizer 20 and the first heater 210, which has the effect of reducing the energy used in the vaporizer 20. When seawater is used as the heat exchange water, the seawater that absorbs heat in the condenser 40 releases the heat in the vaporizer 20 and the first heater 210 and is released back into the sea, which prevents thermal pollution of the sea. In addition, the mixed fuel evaporated in the low-pressure storage tank 100 (or the storage tank) is used as fuel for the boiler 30, which has the effect of reducing the amount of mixed fuel used.

[0127] Seventh embodiment 9 is a conceptual diagram showing a power generation system according to a seventh embodiment of the present invention. In the following, a description of the same parts as those in the power generation system described above may be omitted, and differences will be mainly described.

[0128] The fuel supply system may include a storage tank 10, a vaporizer 20, a first accumulator, a first line 1000, a second line 2000, a third line 3000, a fourth line 4000, a fifth line 5000, a seventh line 7000, a first heater 210, a second heater 220 and a reformer 50.

[0129] The storage tank 10 can store the mixed fuel. The storage tank 10 can store the liquefied mixed fuel. The mixed fuel can be burned in the boiler 30. The mixed fuel can be burned in the boiler 30 together with the fossil fuel. The mixed fuel may be ammonia, for example.

[0130] The storage tank 10 may be connected to a second line 2000. The second line 2000 may transport the mixed fuel stored in the storage tank 10 in a liquid state. The second line 2000 may be connected to the vaporizer 20. The second line 2000 may transport the mixed fuel stored in the storage tank 10 in a liquid state to the vaporizer 20.

[0131] The storage tank 10 may be connected to the third line 3000. The third line 3000 may be disposed on the upper part of the storage tank 10. The third line 3000 may transport the mixed fuel stored in the storage tank 10 in a gaseous state. The third line 3000 may transport the mixed fuel evaporated in the storage tank 10. The third line 3000 may be connected to the first accumulator through a reformer 50, which will be described later. The third line 3000 may transport the mixed fuel evaporated in the storage tank 10 from the storage tank 10 to the first accumulator through the reformer 50, which will be described later.

[0132] The first line 1000 may transport heat exchange water. The heat exchange water may be seawater. The first line 1000 may be connected to the condenser 40 and the vaporizer 20. The heat exchange water transported through the first line 1000 may pass through the condenser 40 and the vaporizer 20. The heat exchange water transported through the first line 1000 may pass through the condenser 40 and the vaporizer 20 in sequence.

[0133] The heat exchange water may be heated in the condenser 40. The heat exchange water may absorb heat in the condenser 40. The heat absorbed by the heat exchange water in the condenser 40 may be heat generated from steam that passes through the turbine and is condensed in the condenser 40. Heat may be transferred to the heat exchange water from steam transferred through the sixth line 6000 in the condenser 40. The heat exchange water may release heat in the evaporator 20. The heat released by the heat exchange water in the evaporator 20 may be heat transferred in the condenser 40.

[0134] The first line 1000 may include a first branch line 1100. In the first line 1000, if the side where the heat exchange water flows into the condenser 40 is the front side of the condenser 40 and the side where the heat exchange water flows out from the condenser 40 is the rear side of the condenser 40, the first branch line 1100 may be disposed rearward of the condenser 40. The first branch line 1100 may be connected to the first line 1000 rearward of the condenser 40. The first branch line 1100 may be connected to the first line 1000 between the condenser 40 and the vaporizer 20. The first branch line 1100 may pass through the first heater 210. The heat exchange water may pass through the first heater 210 through the first branch line 1100. At least a portion of the heat exchange water heated in the condenser 40 may pass through the first heater 210 through the first branch line 1100. The heat exchange water heated in the condenser 40 can release heat in the first heater 210. The heat exchange water heated in the condenser 40 can heat the multi-fuel mixture in the first heater 210.

[0135] The vaporizer 20 may vaporize the mixed fuel. The vaporizer 20 may vaporize the mixed fuel using the heat exchange water flowing through the first line 1000 as a high-temperature heat source. The first line 1000 may pass through the vaporizer 20. The vaporizer 20 may be connected to the second line 2000. The second line 2000 may transfer the mixed fuel stored in the storage tank 10 to the vaporizer 20. The mixed fuel transferred through the second line 2000 may be vaporized in the vaporizer 20. The vaporizer 20 may vaporize the mixed fuel using the heat exchange water heated in the condenser 40 as a high-temperature heat source. The mixed fuel vaporized in the vaporizer 20 may be transferred to the first accumulator through the fourth line 4000.

[0136] The first heater 210 may be disposed between the vaporizer 20 and the first accumulator. The first heater 210 may heat the mixed fuel vaporized in the vaporizer 20. The high-temperature heat source of the first heater 210 may be heat exchange water heated in the condenser 40. The heat exchange water passing through the first heater 210 via the first branch line 1100 may be the high-temperature heat source of the first heater 210.

[0137] The second heater 220 may be disposed between the first heater 210 and the first accumulator. The second heater 220 may reheat the co-fuel heated by the first heater 210. The high-temperature heat source of the second heater 220 may be an independent heat source. The high-temperature heat source of the second heater 220 may be, for example, a heating element using electrical energy, or may be, for example, hot water or steam.

[0138] The reformer 50 can generate hydrogen. The reformer 50 can generate hydrogen using ammonia. Since the technology related to the reformer 50 generating hydrogen using ammonia is a publicly known technology, the description of the technology related thereto can be omitted.

[0139] The reformer 50 may be connected to a third line 3000. The third line 3000 may transfer the mixed fuel evaporated in the storage tank 10 to the reformer 50. The reformer 50 may generate hydrogen using the mixed fuel transferred via the third line 3000. In this case, the mixed fuel may be ammonia.

[0140] The reformer 50 may be connected to a fourth branch line. The fourth branch line may transfer a portion of the mixed fuel transferred via the fourth line 4000 to the reformer 50. The reformer 50 may generate hydrogen using the mixed fuel transferred from the fourth branch line. In this case, the mixed fuel may be ammonia.

[0141] The hydrogen generated in the reformer 50 may be transferred to the first accumulator via a seventh line 7000. The hydrogen generated in the reformer 50 may be transferred from the first accumulator to the boiler 30 together with the co-fuel.

[0142] The fourth line 4000 may transfer the mixed fuel evaporated in the vaporizer 20 to the first accumulator. The fourth line 4000 may connect the vaporizer 20 and the first accumulator. The fourth line 4000 may pass through the first heater 210 and the second heater 220 disposed between the vaporizer 20 and the first accumulator. The fourth line 4000 may include a fourth branch line 4100. The fourth branch line 4100 may connect the fourth line 4000 and the reformer 50. The fourth branch line 4100 may transfer a portion of the mixed fuel transferred through the fourth line 4000 to the reformer 50.

[0143] The first accumulator may be connected to a seventh line 7000. Hydrogen produced in the reformer 50 may be transferred to the first accumulator via the seventh line 7000. The first accumulator may be connected to a fourth line 4000. The fourth line 4000 may transfer the mixed fuel vaporized in the vaporizer 20 to the first accumulator. The first accumulator may be connected to a fifth line 5000. The fifth line 5000 may transfer the mixed fuel in a gaseous state from the first accumulator to the boiler 30.

[0144] According to the power generation system, since the heat exchange water heated by the condenser 40 is used as the high-temperature heat source of the vaporizer 20, there is an effect of reducing the energy used by the vaporizer 20 and the first heater 210. When seawater is used as the heat exchange water, the seawater that absorbs heat in the condenser 40 releases heat in the vaporizer 20 and the first heater 210 and is discharged back into the sea, so that thermal pollution of the sea can be prevented. In addition, since hydrogen is generated using the mixed fuel and the generated hydrogen is used as fuel for the boiler 30, a more active combustion reaction can be utilized.

[0145] Eighth embodiment 10 is a conceptual diagram showing a power generation system according to an eighth embodiment of the present invention. In the following, a description of the same parts as those in the power generation system described above may be omitted, and differences will be mainly described.

[0146] The fuel supply system may include a storage tank 10, a vaporizer 20, a first accumulator, a first line 1000, a second line 2000, a third line 3000, a fourth line 4000, a fifth line 5000, a seventh line 7000, a first heater 210, a second heater 220, a reformer 50 and a second accumulator.

[0147] The storage tank 10 can store the mixed fuel. The storage tank 10 can store the liquefied mixed fuel. The mixed fuel can be burned in the boiler 30. The mixed fuel can be burned in the boiler 30 together with the fossil fuel. The mixed fuel may be ammonia, for example.

[0148] The storage tank 10 may be connected to a second line 2000. The second line 2000 may transport the mixed fuel stored in the storage tank 10 in a liquid state. The second line 2000 may be connected to the vaporizer 20. The second line 2000 may transport the mixed fuel stored in the storage tank 10 in a liquid state to the vaporizer 20.

[0149] The storage tank 10 may be connected to the third line 3000. The third line 3000 may be disposed on the upper part of the storage tank 10. The third line 3000 may transport the mixed fuel stored in the storage tank 10 in a gaseous state. The third line 3000 may transport the mixed fuel evaporated in the storage tank 10. The third line 3000 may be connected to the first accumulator through a reformer 50, which will be described later. The third line 3000 may transport the mixed fuel evaporated in the storage tank 10 from the storage tank 10 to the first accumulator through the reformer 50, which will be described later.

[0150] The first line 1000 may transport heat exchange water. The heat exchange water may be seawater. The first line 1000 may be connected to the condenser 40 and the vaporizer 20. The heat exchange water transported through the first line 1000 may pass through the condenser 40 and the vaporizer 20. The heat exchange water transported through the first line 1000 may pass through the condenser 40 and the vaporizer 20 in sequence.

[0151] The heat exchange water may be heated in the condenser 40. The heat exchange water may absorb heat in the condenser 40. The heat absorbed by the heat exchange water in the condenser 40 may be heat generated from steam that passes through the turbine and is condensed in the condenser 40. Heat may be transferred to the heat exchange water from steam transferred through the sixth line 6000 in the condenser 40. The heat exchange water may release heat in the evaporator 20. The heat released by the heat exchange water in the evaporator 20 may be heat transferred in the condenser 40.

[0152] The first line 1000 may include a first branch line 1100. In the first line 1000, if the side where the heat exchange water flows into the condenser 40 is the front side of the condenser 40 and the side where the heat exchange water flows out from the condenser 40 is the rear side of the condenser 40, the first branch line 1100 may be disposed rearward of the condenser 40. The first branch line 1100 may be connected to the first line 1000 rearward of the condenser 40. The first branch line 1100 may be connected to the first line 1000 between the condenser 40 and the vaporizer 20. The first branch line 1100 may pass through the first heater 210. The heat exchange water may pass through the first heater 210 through the first branch line 1100. At least a portion of the heat exchange water heated in the condenser 40 may pass through the first heater 210 through the first branch line 1100. The heat exchange water heated in the condenser 40 can release heat in the first heater 210. The heat exchange water heated in the condenser 40 can heat the multi-fuel mixture in the first heater 210.

[0153] The vaporizer 20 may vaporize the mixed fuel. The vaporizer 20 may vaporize the mixed fuel using the heat exchange water flowing through the first line 1000 as a high-temperature heat source. The first line 1000 may pass through the vaporizer 20. The vaporizer 20 may be connected to the second line 2000. The second line 2000 may transfer the mixed fuel stored in the storage tank 10 to the vaporizer 20. The mixed fuel transferred through the second line 2000 may be vaporized in the vaporizer 20. The vaporizer 20 may vaporize the mixed fuel using the heat exchange water heated in the condenser 40 as a high-temperature heat source. The mixed fuel vaporized in the vaporizer 20 may be transferred to the first accumulator through the fourth line 4000.

[0154] The first heater 210 may be disposed between the vaporizer 20 and the first accumulator. The first heater 210 may heat the mixed fuel vaporized in the vaporizer 20. The high-temperature heat source of the first heater 210 may be heat exchange water heated in the condenser 40. The heat exchange water passing through the first heater 210 via the first branch line 1100 may be the high-temperature heat source of the first heater 210.

[0155] The second heater 220 may be disposed between the first heater 210 and the first accumulator. The second heater 220 may reheat the co-fuel heated by the first heater 210. The high-temperature heat source of the second heater 220 may be an independent heat source. The high-temperature heat source of the second heater 220 may be, for example, a heating element using electrical energy, or may be, for example, hot water or steam.

[0156] The reformer 50 can generate hydrogen. The reformer 50 can generate hydrogen using ammonia. Since the technology related to the reformer 50 generating hydrogen using ammonia is a publicly known technology, the description of the technology related thereto can be omitted.

[0157] The reformer 50 may be connected to a third line 3000. The third line 3000 may transfer the mixed fuel evaporated in the storage tank 10 to the reformer 50. The reformer 50 may generate hydrogen using the mixed fuel transferred via the third line 3000. In this case, the mixed fuel may be ammonia.

[0158] The reformer 50 may be connected to a fourth branch line 4100. The fourth branch line 4100 may transfer a portion of the mixed fuel transferred via the fourth line 4000 to the reformer 50. The reformer 50 may generate hydrogen using the mixed fuel transferred from the fourth branch line 4100. In this case, the mixed fuel may be ammonia.

[0159] The hydrogen produced in the reformer 50 may be transferred to the second accumulator via a seventh line 7000. The hydrogen produced in the reformer 50 may be transferred from the second accumulator to the boiler 30.

[0160] The fourth line 4000 may transfer the mixed fuel evaporated in the vaporizer 20 to the first accumulator. The fourth line 4000 may connect the vaporizer 20 and the first accumulator. The fourth line 4000 may pass through the first heater 210 and the second heater 220 disposed between the vaporizer 20 and the first accumulator. The fourth line 4000 may include a fourth branch line. The fourth branch line may connect the fourth line 4000 and the reformer 50. The fourth branch line may transfer a portion of the mixed fuel transferred through the fourth line 4000 to the reformer 50.

[0161] According to the power generation system, the heat exchange water heated in the condenser 40 is used as a high-temperature heat source for the vaporizer 20 and the first heater 210, which has the effect of reducing the energy used in the vaporizer 20. When seawater is used as the heat exchange water, the seawater that absorbs heat in the condenser 40 releases heat in the vaporizer 20 and the first heater 210 and is released back into the sea, which prevents thermal pollution of the sea. In addition, hydrogen is produced using the mixed fuel, and the produced hydrogen is used as fuel for the boiler 30, which makes it possible to utilize a more active combustion reaction.

[0162] <Ninth embodiment> 11 is a conceptual diagram showing a power generation system according to a ninth embodiment of the present invention. In the following, a description of the same parts as those in the power generation system described above may be omitted, and differences will be mainly described.

[0163] The fuel supply system may include a low pressure storage tank 100 (or storage tank), a first pump 110, a first compressor 120, a second pump 130, a carburetor 20, a first line 1000, a second line 2000, a third line 3000, a fourth line 4000, a fifth line 5000, a first heater 210, a second heater 220, an eighth line 8000, a second compressor 140 and a first accumulator.

[0164] The low pressure storage tank 100 (or storage tank) can store the mixed fuel. The low pressure storage tank 100 (or storage tank) can store the liquefied mixed fuel. The mixed fuel can be combusted in the boiler 30. The mixed fuel can be combusted in the boiler 30 together with the fossil fuel. The mixed fuel may be ammonia, as an example.

[0165] The low pressure storage tank 100 (or storage tank) may be connected to the second line 2000. The second line 2000 may transfer the mixed fuel stored in the low pressure storage tank 100 (or storage tank) in a liquid state. The second line 2000 may be connected to the vaporizer 20. The second line 2000 may transfer the mixed fuel in a liquid state stored in the low pressure storage tank 100 (or storage tank) to the first pump 110 and then to the vaporizer 20. The second line 2000 may transfer the mixed fuel in a liquid state transferred to the first pump 110 to the first heater 210. The second line 2000 may transfer the mixed fuel in a liquid state stored in the low pressure storage tank 100 (or storage tank) to the first pump 110, the first heater 210 and the vaporizer 20.

[0166] The low pressure storage tank 100 (or storage tank) may be connected to the third line 3000. The third line 3000 may be disposed on the upper part of the low pressure storage tank 100 (or storage tank). The third line 3000 may transport the mixed fuel stored in the low pressure storage tank 100 (or storage tank) in a gaseous state. The third line 3000 may transport the mixed fuel evaporated in the low pressure storage tank 100 (or storage tank). The third line 3000 may be connected to the vaporizer 20. The third line 3000 may pass through the first compressor 120. The third line 3000 may transport the mixed fuel to the first compressor 120 and the vaporizer 20. The third line 3000 can transport the mixed fuel evaporated in the low-pressure storage tank 100 (or the storage tank) from the low-pressure storage tank 100 (or the storage tank) to the first compressor 120 and then to the vaporizer 20 .

[0167] The first pump 110 can pressurize the liquid-state mixed fuel transferred from the low-pressure storage tank 100 (or a storage tank). The first pump 110 can be disposed on the second line 2000. The liquid-state mixed fuel pressurized by the first pump 110 can be transferred to the vaporizer 20 via the second line 2000.

[0168] The first compressor 120 may compress the mixed fuel evaporated in the low pressure storage tank 100 (or a storage tank). The first compressor 120 may be disposed on the third line 3000. The mixed fuel compressed by the first compressor 120 may be transferred to the vaporizer 20.

[0169] The first line 1000 may transport heat exchange water. The heat exchange water may be seawater. The first line 1000 may be connected to the condenser 40 and the vaporizer 20. The heat exchange water transported through the first line 1000 may pass through the condenser 40 and the vaporizer 20. The heat exchange water transported through the first line 1000 may pass through the condenser 40 and the vaporizer 20 in sequence.

[0170] The heat exchange water may be heated in the condenser 40. The heat exchange water may absorb heat in the condenser 40. The heat absorbed by the heat exchange water in the condenser 40 may be heat generated from steam that passes through the turbine and is condensed in the condenser 40. Heat may be transferred to the heat exchange water from steam transferred through the sixth line 6000 in the condenser 40. The heat exchange water may release heat in the evaporator 20. The heat released by the heat exchange water in the evaporator 20 may be heat transferred in the condenser 40.

[0171] The first line 1000 may include a first branch line 1100. In the first line 1000, if the side where the heat exchange water flows into the condenser 40 is defined as the front side of the condenser 40 and the side where the heat exchange water flows out from the condenser 40 is defined as the rear side of the condenser 40, the first branch line 1100 may be disposed rearward of the condenser 40.

[0172] The first branch line 1100 may be connected to the first line 1000 behind the condenser 40. The first branch line 1100 may be connected to the first line 1000 between the condenser 40 and the vaporizer 20. The first branch line 1100 may pass through the vaporizer 20. The heat exchange water may pass through the vaporizer 20 via the first branch line 1100. At least a portion of the heat exchange water heated in the condenser 40 may pass through the vaporizer 20 via the first branch line 1100. The heat exchange water heated in the condenser 40 may release heat in the vaporizer 20. The heat exchange water heated in the condenser 40 may heat the mixed combustion fuel in the vaporizer 20.

[0173] The first branch line 1100 may include a first branch bypass line 1200. The first branch bypass line 1200 may pass through the first heater 210. When the heat exchange water passes through the first branch bypass line 1200, the heat exchange water may be used as a high-temperature heat source for the first heater 210. That is, the heat exchange water may release heat to the first heater 210 through the first branch bypass line 1200. The co-combustion fuel transferred through the second line 2000 may be heated in the first heater 210.

[0174] The first branch line 1100 may include a 1-1 valve 1210. The first branch detour line 1200 may include a 1-2 valve 1220 and a 1-3 valve 1230. The 1-1 valve 1210 may be disposed in the first branch line 1100. The 1-2 valve and the 1-3 valve 1230 may be disposed in the first branch detour line 1200.

[0175] When the 1-1 valve 1210 is closed and the 1-2 valve 1220 and the 1-3 valve 1230 are opened, the heat exchange water transferred to the first branch line 1100 may be transferred to the first branch bypass line 1200. Therefore, in this case, the heat exchange water may be used as a high-temperature heat source for the first heater 210. The heat exchange water transferred to the first branch bypass line 1200 may be transferred to the first line 1000, and the heat exchange water transferred to the first branch bypass line 1200 may be discharged to the outside.

[0176] When the 1-1 valve 1210 is opened and the 1-2 valve 1220 and the 1-3 valve 1230 are closed, the heat exchange water transferred to the first branch line 1100 may be transferred to the first line 1000 and discharged to the outside. In this case, the first heater 210 may not heat the mixed fuel transferred through the second line 2000.

[0177] The vaporizer 20 may vaporize the mixed fuel. The vaporizer 20 may vaporize the mixed fuel using the heat exchange water flowing through the first branch line 1100 as a high-temperature heat source. The first branch line 1100 may pass through the vaporizer 20. The vaporizer 20 may be connected to the second line 2000. The second line 2000 may transfer the mixed fuel stored in the low-pressure storage tank 100 (or a storage tank) to the vaporizer 20. The mixed fuel transferred through the second line 2000 may be vaporized in the vaporizer 20. The vaporizer 20 may vaporize the mixed fuel using the heat exchange water heated by the condenser 40 as a high-temperature heat source. The mixed fuel vaporized in the vaporizer 20 may be transferred to the first accumulator through the fourth line 4000.

[0178] The first heater 210 may be disposed between the first pump 110 and the vaporizer 20. The first heater 210 may heat the multi-fuel pressurized by the first pump 110. The high-temperature heat source of the first heater 210 may be heat exchange water heated by the condenser 40. The heat exchange water passing through the first heater 210 via the first branch bypass line 1200 may be the high-temperature heat source of the first heater 210.

[0179] The second heater 220 may be disposed between the first heater 210 and the first accumulator. The second heater 220 may reheat the co-fuel heated by the first heater 210. The high-temperature heat source of the second heater 220 may be blowdown water generated in the boiler 30. The blowdown water is a portion of the water discharged from the boiler 30 for the removal of impurities. The blowdown water is a portion of the water heated in the boiler 30.

[0180] The eighth line 8000 may be connected to the boiler 30. The eighth line 8000 may pass through the second heater 220. The eighth line 8000 may transport blowdown water. The blowdown water may be routed through the second heater 220 via the eighth line 8000, and the blowdown water may be used as a high temperature heat source for the second heater 220.

[0181] The fourth line 4000 may transfer the mixed fuel evaporated in the vaporizer 20 to the first accumulator. The fourth line 4000 may connect the vaporizer 20 and the first accumulator. The fourth line 4000 may pass through the second heater 220 disposed between the vaporizer 20 and the first accumulator. The mixed fuel transferred through the fourth line 4000 may be heated by the second heater 220.

[0182] The first accumulator may be connected to a fifth line 5000. The fifth line 5000 may transport the co-fuel in a gaseous state from the first accumulator to the boiler 30.

[0183] According to the power generation system, the heat exchange water heated in the condenser 40 is used as the high-temperature heat source of the vaporizer 20, which has the effect of reducing the energy used in the vaporizer 20. When seawater is used as the heat exchange water, the seawater that absorbs heat in the condenser 40 releases the heat in the vaporizer 20 or the first heater 210 and is discharged back into the sea, which can prevent thermal pollution of the sea. The blowdown water generated in the boiler 30 is used as the high-temperature heat source of the second heater 220, which can reduce the energy used in the second heater 220. In addition, the mixed fuel evaporated in the low-pressure storage tank 100 (or the storage tank) is used as fuel for the boiler 30, which has the effect of reducing the amount of mixed fuel used.

[0184] Tenth embodiment 12 is a conceptual diagram showing a power generation system according to a tenth embodiment of the present invention. In the following, a description of the same parts as those in the above-mentioned power generation system may be omitted, and differences may be mainly described.

[0185] The fuel supply system may include a low pressure storage tank 100 (or storage tank), a first pump 110, a first compressor 120, a second pump 130, a carburetor 20, a first line 1000, a second line 2000, a third line 3000, a fourth line 4000, a fifth line 5000, a first heater 210, a second heater 220, an eighth line 8000, a second compressor 140 and a first accumulator.

[0186] The low pressure storage tank 100 (or storage tank) can store the mixed fuel. The low pressure storage tank 100 (or storage tank) can store the liquefied mixed fuel. The mixed fuel can be combusted in the boiler 30. The mixed fuel can be combusted in the boiler 30 together with the fossil fuel. The mixed fuel may be ammonia, as an example.

[0187] The low pressure storage tank 100 (or storage tank) may be connected to the second line 2000. The second line 2000 may transfer the mixed fuel stored in the low pressure storage tank 100 (or storage tank) in a liquid state. The second line 2000 may be connected to the vaporizer 20. The second line 2000 may transfer the mixed fuel in a liquid state stored in the low pressure storage tank 100 (or storage tank) to the first pump 110 and then to the vaporizer 20. The second line 2000 may transfer the mixed fuel in a liquid state transferred to the first pump 110 to the first heater 210. The second line 2000 may transfer the mixed fuel in a liquid state stored in the low pressure storage tank 100 (or storage tank) to the first pump 110, the first heater 210 and the vaporizer 20.

[0188] The first heater 210 can heat the mixed fuel pressurized by the first pump 110. The first heater 210 can heat the mixed fuel transferred to the second line 2000. In this case, the high-temperature heat source of the first heater 210 can be heat exchange water heated in the vaporizer 20. The heat exchange water used as the high-temperature heat source in the first heater 210 can be discharged into the sea. Since the heat exchange water is cooled in the first heater 210 and the cooled heat exchange water is discharged into the sea, thermal pollution of the sea can be prevented.

[0189] The low pressure storage tank 100 (or storage tank) may be connected to the third line 3000. The third line 3000 may be disposed on the upper part of the low pressure storage tank 100 (or storage tank). The third line 3000 may transport the mixed fuel stored in the low pressure storage tank 100 (or storage tank) in a gaseous state. The third line 3000 may transport the mixed fuel evaporated in the low pressure storage tank 100 (or storage tank). The third line 3000 may be connected to the fourth line 4000. The mixed fuel transported through the third line 3000 may be transported to the fourth line 4000 and then heated by the second heater 220.

[0190] The first pump 110 can pressurize the liquid-state mixed fuel transferred from the low-pressure storage tank 100 (or a storage tank). The first pump 110 can be disposed on the second line 2000. The liquid-state mixed fuel pressurized by the first pump 110 can be transferred to the vaporizer 20 via the second line 2000.

[0191] The first compressor 120 can compress the mixed fuel evaporated in the low pressure storage tank 100 (or a storage tank). The first compressor 120 can be disposed on the third line 3000. The mixed fuel compressed by the first compressor 120 can be transferred to the fourth line 4000.

[0192] The first line 1000 may transport heat exchange water. The heat exchange water may be seawater. The first line 1000 may be connected to the condenser 40 and the vaporizer 20. The heat exchange water transported through the first line 1000 may pass through the condenser 40 and the vaporizer 20. The heat exchange water transported through the first line 1000 may pass through the condenser 40 and the vaporizer 20 in sequence.

[0193] The first line 1000 may include a first path or a second path. The first line 1000 may include a plurality of valves. The first line 1000 may change the flow path of the heat exchange water to the first path or the second path by combining a plurality of lines and a plurality of valves. Here, the plurality of lines and valves included in the first line 1000 are not limited to the lines and valves shown in FIG. 12, and it is sufficient as long as they can form the path of the heat exchange water described below.

[0194] The first line 1000 may transport the heat exchange water through a first path. Here, the first path means a path through which the heat exchange water is transported by the first line 1000, and may be a path through which the heat exchange water is discharged after sequentially passing through the condenser 40 and the evaporator 20. When the heat exchange water is transported through the first path, the heat exchange water may absorb heat in the condenser 40 and release heat in the evaporator 20.

[0195] A first valve 1310, a second valve 1320, and a third valve 1330 may be disposed on the first path. The first valve 1310 may be disposed in front of the condenser 40. Thus, when the first valve 1310 is opened, the heat exchange water may flow into the condenser 40. The second valve 1320 may be disposed in rear of the condenser 40 and in front of the vaporizer 20. Thus, when the second valve 1320 is opened, the heat exchange water may flow from the condenser 40 to the vaporizer 20. The third valve 1330 may be disposed in rear of the vaporizer 20. Thus, when the third valve 1330 is opened, the heat exchange water may be discharged to the outside.

[0196] When the heat exchange water flows through the first path, the first valve 1310, the second valve 1320, and the third valve 1330 may be opened. By opening the first valve 1310, the second valve 1320, and the third valve 1330, the heat exchange water can flow through the first path. That is, the heat exchange water can sequentially pass through the first valve 1310, the condenser 40, the second valve 1320, the evaporator 20, and the third valve 1330. In order for the heat exchange water to flow through the first path, the fourth valve 1340, the fifth valve 1350, and the sixth valve 1360 described below must be closed.

[0197] The first line 1000 may transport the heat exchange water through a second path. Here, the second path means a path through which the heat exchange water is transported by the first line 1000, and may be a path through which the heat exchange water is discharged after sequentially passing through the evaporator 20 and the condenser 40. When the heat exchange water is transported through the second path, the heat exchange water may release heat in the evaporator 20 and absorb heat in the condenser 40.

[0198] A fourth valve 1340, a fifth valve 1350, and a sixth valve 1360 may be disposed on the second path. The fourth valve 1340 may be disposed in front of the vaporizer 20. Also, the fourth valve 1340 may be disposed in front of the first valve 1310. When the fourth valve 1340 is opened, the heat exchange water may flow into the vaporizer 20. When the fourth valve 1340 is closed and the first valve 1310 is opened, the heat exchange water may flow into the first valve 1310. The fifth valve 1350 may be disposed in the rear of the vaporizer 20, and the fifth valve 1350 may be disposed in front of the condenser 40. Thus, when the fifth valve 1350 is opened, the heat exchange water flowing out of the vaporizer 20 may flow into the condenser 40. The sixth valve 1360 may be disposed in the rear of the condenser 40. When the sixth valve 1360 is opened, the heat exchange water flowing out from the condenser 40 can be discharged to the outside.

[0199] When the heat exchange water flows through the second path, the fourth valve 1340, the fifth valve 1350, and the sixth valve 1360 may be opened. By opening the fourth valve 1340, the fifth valve 1350, and the sixth valve 1360, the heat exchange water may flow through the second path. The heat exchange water may sequentially pass through the fourth valve 1340, the evaporator 20, the fifth valve 1350, the condenser 40, and the sixth valve 1360. In order for the heat exchange water to flow through the second path, the first valve 1310, the second valve 1320, and the third valve 1330 must be closed.

[0200] The effect of the heat exchange water flowing through the first or second path will be described with reference to Fig. 13. Fig. 13 is a graph showing the annual seawater temperature distribution in the Samcheok area of ​​South Korea. Although the seawater temperature distribution in the Samcheok area is used as an example, it is obvious that the same effect can be obtained in any location where the seawater temperature distribution varies depending on the season, regardless of the area.

[0201] 13, it can be seen that the annual seawater temperature distribution is a minimum of 2.1°C and a maximum of 28°C. When the temperature of seawater used as heat exchange water is low, the heat absorption efficiency in the condenser 40 is high because the temperature of the seawater is low. Therefore, when seawater, which is heat exchange water, is caused to flow through the first path, the heat can be effectively absorbed in the condenser and released in the evaporator 20.

[0202] In contrast, when the temperature of seawater used as heat exchange water is high, the temperature of the seawater is high and therefore the seawater can be used as a heat source for the vaporizer 20 without being heated by the condenser 40. Therefore, when the seawater, which is heat exchange water, is caused to flow through the second path, the seawater can release heat in the vaporizer 20 and then flow into the condenser 40 to absorb the heat. Therefore, even when the temperature of the seawater is high, the heat absorption efficiency of the condenser 40 is improved.

[0203] The effects of the operation of the first line 1000 and the first detour line 1300 will be described with reference to Table 1 and FIG.

[0204] [Table 1]

[0205] Table 1 shows the saturation temperature of ammonia according to pressure, and FIG. 13 is a graph showing the annual seawater temperature distribution in the Samcheok region of South Korea. Although the saturation temperature of ammonia and the seawater temperature distribution in the Samcheok region are used as examples, it is obvious that the same effect can be obtained regardless of the region or the time of year as long as the temperature of the seawater is higher than the saturation temperature of the mixed-fuel gas. Referring to FIG. 13, it can be seen that the annual seawater temperature distribution is a minimum of 2.1° C. and a maximum of 28° C. Referring to this, it can be seen that the mixed-fuel fuel can be heated using seawater as long as the temperature of the seawater is higher than the saturation temperature of the mixed-fuel fuel stored in the storage tank 10 regardless of the region or the date. In the winter season when the temperature of the seawater used as the heat exchange water of the condenser 40 is low, the heat absorption efficiency of the condenser 40 increases because the temperature of the seawater is low. Therefore, in this case, the seawater can be transported through the first route. When the seawater is transported through the first route, the seawater can be used as a high-temperature heat source in the vaporizer 20 after being heated in the condenser 40. Since seawater is used when vaporizing the mixed fuel in the vaporizer 20, there is an effect of reducing energy. In addition, since the seawater heated in the condenser 40 is cooled in the vaporizer 20, there is an effect of preventing thermal pollution of the sea. In the summer, when the temperature of the seawater used as the heat exchange water of the condenser 40 is high, the heat absorption efficiency of the condenser 40 decreases due to the high temperature of the seawater. Therefore, in that case, the seawater can be transported through the second path. When the seawater is transported through the second path, the seawater can be used as a low-temperature heat source in the condenser 40 after being cooled in the vaporizer 20. Since seawater is used when vaporizing the mixed fuel in the vaporizer 20, there is an effect of reducing energy. In addition, since the seawater cooled in the vaporizer 20 is used as a low-temperature heat source in the condenser 40, there is an effect of increasing the heat transfer coefficient of the condenser 40.

[0206] Whether seawater is caused to flow through the first route or the second route is not determined by a specific date or a specific season. As an example, when ammonia used as the co-fuel fuel is in a 5 bar state, the vaporization temperature of ammonia is 4.2°C. The temperature of seawater in the vaporizer 20 is sufficient as long as it is a temperature that vaporizes ammonia. Therefore, if the temperature of seawater is higher than 4.2°C and is a temperature that is high enough to vaporize ammonia, the seawater can flow through the second route. On the other hand, if the temperature of seawater is low enough to vaporize ammonia, the seawater can flow through the first route.

[0207] The vaporizer 20 can vaporize the mixed fuel. The vaporizer 20 can vaporize the mixed fuel by using the heat exchange water flowing through the first line 1000 or the first bypass line 1300 as a high-temperature heat source. The vaporizer 20 can vaporize the mixed fuel flowing into the vaporizer 20 through the second line 2000. The mixed fuel vaporized in the vaporizer 20 can flow out of the vaporizer 20 through the fourth line 4000.

[0208] The fourth line 4000 may transfer the mixed fuel vaporized in the vaporizer 20 to the first accumulator. The fourth line 4000 may pass through the second heater 220 and the second compressor 140. The mixed fuel transferred through the fourth line 4000 may be heated by the second heater 220. The mixed fuel heated by the second heater 220 and transferred through the fourth line 4000 may be compressed by the second compressor 140.

[0209] The second heater 220 may heat the co-fuel transferred via the fourth line 4000. The high temperature heat source of the second heater 220 may be blowdown water discharged from the boiler 30. The blowdown water may be a portion of the water discharged from the boiler 30 for removing impurities. The blowdown water may be a portion of the water heated in the boiler 30.

[0210] The eighth line 8000 may be connected to the boiler 30. The eighth line 8000 may pass through the second heater 220. The eighth line 8000 may transport blowdown water. The blowdown water may be routed through the second heater 220 via the eighth line 8000, and the blowdown water may be used as a high temperature heat source for the second heater 220.

[0211] The first accumulator may be connected to a fifth line 5000. The fifth line 5000 may transport the co-fuel in a gaseous state from the first accumulator to the boiler 30.

[0212] According to the power generation system, the heat exchange water heated in the condenser 40 is used as the high-temperature heat source of the vaporizer 20, which has the effect of reducing the energy used in the vaporizer 20. When seawater is used as the heat exchange water, the seawater that absorbs heat in the condenser 40 releases the heat in the vaporizer 20 or the first heater 210 and is discharged back into the sea, which can prevent thermal pollution of the sea. The blowdown water generated in the boiler 30 is used as the high-temperature heat source of the second heater 220, which can reduce the energy used in the second heater 220. In addition, the mixed fuel evaporated in the low-pressure storage tank 100 (or the storage tank) is used as fuel for the boiler 30, which has the effect of reducing the amount of mixed fuel used.

[0213] <Eleventh embodiment> 14 is a conceptual diagram showing a power generation system according to an eleventh embodiment of the present invention. In the following, a description of the same parts as those in the power generation system described above may be omitted, and differences will be mainly described.

[0214] The fuel supply system may include a low pressure storage tank 100 (or storage tank), a first pump 110, a first compressor 120, a second pump 130, a carburetor 20, a first line 1000, a second line 2000, a third line 3000, a fourth line 4000, a fifth line 5000, a first heater 210, a second heater 220, an eighth line 8000, a ninth line 9000, a third heater 230, a second compressor 140 and a first accumulator.

[0215] The low pressure storage tank 100 (or storage tank) can store the mixed fuel. The low pressure storage tank 100 (or storage tank) can store the liquefied mixed fuel. The mixed fuel can be combusted in the boiler 30. The mixed fuel can be combusted in the boiler 30 together with the fossil fuel. The mixed fuel may be ammonia, as an example.

[0216] The low pressure storage tank 100 (or storage tank) may be connected to the second line 2000. The second line 2000 may transfer the mixed fuel stored in the low pressure storage tank 100 (or storage tank) in a liquid state. The second line 2000 may be connected to the vaporizer 20. The second line 2000 may transfer the mixed fuel in a liquid state stored in the low pressure storage tank 100 (or storage tank) to the first pump 110 and then to the vaporizer 20. The second line 2000 may transfer the mixed fuel in a liquid state transferred to the first pump 110 to the first heater 210. The second line 2000 may transfer the mixed fuel in a liquid state stored in the low pressure storage tank 100 (or storage tank) to the first pump 110, the first heater 210 and the vaporizer 20.

[0217] The first heater 210 can heat the mixed fuel pressurized by the first pump 110. The first heater 210 can heat the mixed fuel transferred to the second line 2000. In this case, the high-temperature heat source of the first heater 210 can be a heat medium circulating through the ninth line 9000. The high-temperature heat source of the first heater 210 can be a heat medium flowing through the ninth bypass line 9100 of the ninth line 9000.

[0218] The low pressure storage tank 100 (or storage tank) may be connected to the third line 3000. The third line 3000 may be disposed on the upper part of the low pressure storage tank 100 (or storage tank). The third line 3000 may be connected to the vaporizer 20 through the first compressor 120. The third line 3000 may transport the mixed fuel stored in the low pressure storage tank 100 (or storage tank) in a gaseous state. The third line 3000 may transport the mixed fuel evaporated in the low pressure storage tank 100 (or storage tank). The mixed fuel transported through the third line 3000 may be compressed through the first compressor 120 and transported to the vaporizer 20.

[0219] The first pump 110 can pressurize the liquid-state mixed fuel transferred from the low-pressure storage tank 100 (or a storage tank). The first pump 110 can be disposed on the second line 2000. The liquid-state mixed fuel pressurized by the first pump 110 can be transferred to the vaporizer 20 via the second line 2000.

[0220] The first compressor 120 may compress the mixed fuel evaporated in the low pressure storage tank 100 (or a storage tank). The first compressor 120 may be disposed on the third line 3000. The mixed fuel compressed by the first compressor 120 may be transferred to the vaporizer 20.

[0221] The first line 1000 may transport heat exchange water. The heat exchange water may be seawater. The first line 1000 may be connected to the condenser 40 and the third heater 230. The heat exchange water transported through the first line 1000 may pass through the condenser 40 and the third heater 230. The heat exchange water transported through the first line 1000 may pass through the condenser 40 and the third heater 230 in sequence.

[0222] The heat exchange water may be heated in the condenser 40. The heat exchange water may absorb heat in the condenser 40. The heat absorbed by the heat exchange water in the condenser 40 may be heat generated from steam passing through the turbine and condensed in the condenser 40. Heat may be transferred to the heat exchange water from steam transferred through a sixth line 6000 in the condenser 40. The heat exchange water may release heat in the third heater 230. The heat released by the heat exchange water in the third heater 230 may be heat transferred in the condenser 40. The heat released by the heat exchange water in the third heater 230 may be transferred to the heat medium. The heat released by the heat exchange water in the third heater 230 may be transferred to the heat medium circulating through a ninth line 9000.

[0223] The vaporizer 20 can vaporize the mixed fuel. The vaporizer 20 can vaporize the mixed fuel by using the heat medium flowing through the ninth line 9000 as a high-temperature heat source. The vaporizer 20 can vaporize the mixed fuel flowing into the vaporizer 20 through the second line 2000. The mixed fuel vaporized in the vaporizer 20 can flow out of the vaporizer 20 through the fourth line 4000.

[0224] The ninth line 9000 may be a line that circulates through the vaporizer 20 and the third heater 230. The ninth line 9000 may pass through the vaporizer 20 and the third heater 230. A heat medium may circulate through the ninth line 9000. The heat medium circulating through the ninth line 9000 may be heated by the third heater 230. The heat exchange water passing through the third heater 230 may heat the heat medium passing through the third heater 230. The heat medium circulating through the ninth line 9000 may be cooled by the vaporizer 20. The heat medium circulating through the ninth line 9000 may transfer heat to the mixed fuel in the vaporizer 20. The heat medium circulating through the ninth line 9000 may heat the mixed fuel in the vaporizer 20. Here, the heat medium may be triethylene glycol, for example.

[0225] The ninth line 9000 may include a ninth bypass line 9100. The ninth bypass line 9100 may pass through the first heater 210. The ninth bypass line 9100 may transfer the heat medium that has passed through the vaporizer 20 to the first heater 210. The ninth line 9000 may include a 9-1 valve 9110. The ninth bypass line 9100 may include a 9-2 valve 9120 and a 9-3 valve 9130. When the 9-1 valve 9110 is closed and the 9-2 valve 9120 and the 9-3 valve 9130 are opened, the heat medium may pass through the ninth bypass line 9100. That is, the heat medium may pass through the ninth bypass line 9100 and circulate through the ninth line 9000. When the 9-1 valve 9110 is opened and the 9-2 valve 9120 and the 9-3 valve 9130 are closed, the heat medium can circulate through the 9th line 9000 without passing through the 9th bypass line 9100.

[0226] Since heat exchange is not performed directly between the heat exchange water and the co-firing fuel but indirectly via a heat medium, corrosion, freezing, or damage to pipes, etc. that may occur due to a decrease in seawater temperature can be prevented.

[0227] The fourth line 4000 may transfer the mixed fuel vaporized in the vaporizer 20 to the first accumulator. The fourth line 4000 may pass through the second heater 220 and the second compressor 140. The mixed fuel transferred through the fourth line 4000 may be heated by the second heater 220. The mixed fuel heated by the second heater 220 and transferred through the fourth line 4000 may be compressed by the second compressor 140.

[0228] The second heater 220 may heat the co-fuel transferred via the fourth line 4000. The high temperature heat source of the second heater 220 may be blowdown water discharged from the boiler 30. The blowdown water may be a portion of the water discharged from the boiler 30 for removing impurities. The blowdown water may be a portion of the water heated in the boiler 30.

[0229] The eighth line 8000 may be connected to the boiler 30. The eighth line 8000 may pass through the second heater 220. The eighth line 8000 may transport blowdown water. The blowdown water may be routed through the second heater 220 via the eighth line 8000, and the blowdown water may be used as a high temperature heat source for the second heater 220.

[0230] The first accumulator may be connected to a fifth line 5000. The fifth line 5000 may transport the co-fuel in a gaseous state from the first accumulator to the boiler 30.

[0231] According to the power generation system, the heat exchange water heated by the condenser 40 is used as a high-temperature heat source for the vaporizer 20, which has the effect of reducing the energy used in the vaporizer 20. When seawater is used as the heat exchange water, the seawater that absorbs heat in the condenser 40 releases the heat in the vaporizer 20 or the first heater 210 and is discharged back into the sea, which can prevent thermal pollution of the sea. Since the heat exchange water and the co-fuel do not directly exchange heat with each other but indirectly exchange heat with each other using a heat medium, it is possible to prevent corrosion, freezing, or damage of piping and the like that may occur due to a reduction in seawater temperature. Furthermore, since the seawater and ammonia indirectly exchange heat with each other using a heat medium, it is possible to prevent contamination of the seawater in the event of damage to the ammonia piping.

[0232] Since the blowdown water generated in the boiler 30 is used as a high-temperature heat source for the second heater 220, it is possible to reduce the energy used for the second heater 220. In addition, since the mixed fuel evaporated in the low-pressure storage tank 100 (or the storage tank) is used as fuel for the boiler 30, there is an effect of reducing the amount of mixed fuel used.

[0233] <Twelfth embodiment> 15 is a conceptual diagram showing a power generation system according to a twelfth embodiment of the present invention. In the following, a description of the same parts as those in the power generation system described above may be omitted, and differences will be mainly described.

[0234] The fuel supply system may include a low pressure storage tank 100 (or storage tank), a first pump 110, a first compressor 120, a second pump 130, a carburetor 20, a first line 1000, a second line 2000, a third line 3000, a fourth line 4000, a fifth line 5000, a first heater 210, a second heater 220, an eighth line 8000, a ninth line 9000, a third heater 230, a second compressor 140 and a first accumulator.

[0235] The low pressure storage tank 100 (or storage tank) can store the mixed fuel. The low pressure storage tank 100 (or storage tank) can store the liquefied mixed fuel. The mixed fuel can be combusted in the boiler 30. The mixed fuel can be combusted in the boiler 30 together with the fossil fuel. The mixed fuel may be ammonia, as an example.

[0236] The low pressure storage tank 100 (or storage tank) may be connected to the second line 2000. The second line 2000 may transfer the mixed fuel stored in the low pressure storage tank 100 (or storage tank) in a liquid state. The second line 2000 may be connected to the vaporizer 20. The second line 2000 may transfer the mixed fuel in a liquid state stored in the low pressure storage tank 100 (or storage tank) to the first pump 110 and then to the vaporizer 20. The second line 2000 may transfer the mixed fuel in a liquid state transferred to the first pump 110 to the first heater 210. The second line 2000 may transfer the mixed fuel in a liquid state stored in the low pressure storage tank 100 (or storage tank) to the first pump 110, the first heater 210 and the vaporizer 20.

[0237] The first heater 210 can heat the mixed fuel pressurized by the first pump 110. The first heater 210 can heat the mixed fuel transferred to the second line 2000. In this case, the high-temperature heat source of the first heater 210 can be a heat medium circulating through the ninth line 9000. The high-temperature heat source of the first heater 210 can be a heat medium flowing through the ninth bypass line 9100 of the ninth line 9000.

[0238] The low pressure storage tank 100 (or storage tank) may be connected to the third line 3000. The third line 3000 may be disposed on the upper part of the low pressure storage tank 100 (or storage tank). The third line 3000 may be connected to the vaporizer 20 through the first compressor 120. The third line 3000 may transport the mixed fuel stored in the low pressure storage tank 100 (or storage tank) in a gaseous state. The third line 3000 may transport the mixed fuel evaporated in the low pressure storage tank 100 (or storage tank). The mixed fuel transported through the third line 3000 may be compressed through the first compressor 120 and transported to the vaporizer 20.

[0239] The first pump 110 can pressurize the liquid-state mixed fuel transferred from the low-pressure storage tank 100 (or a storage tank). The first pump 110 can be disposed on the second line 2000. The liquid-state mixed fuel pressurized by the first pump 110 can be transferred to the vaporizer 20 via the second line 2000.

[0240] The first compressor 120 may compress the mixed fuel evaporated in the low pressure storage tank 100 (or a storage tank). The first compressor 120 may be disposed on the third line 3000. The mixed fuel compressed by the first compressor 120 may be transferred to the vaporizer 20.

[0241] The first line 1000 may transport heat exchange water. The heat exchange water may be seawater. The first line 1000 may be connected to the condenser 40 and the third heater 230. The heat exchange water transported through the first line 1000 may pass through the condenser 40 and the third heater 230. The heat exchange water transported through the first line 1000 may pass through the condenser 40 and the third heater 230 in sequence.

[0242] The heat exchange water may be heated in the condenser 40. The heat exchange water may absorb heat in the condenser 40. The heat absorbed by the heat exchange water in the condenser 40 may be heat generated from steam passing through the turbine and condensed in the condenser 40. Heat may be transferred to the heat exchange water from steam transferred through a sixth line 6000 in the condenser 40. The heat exchange water may release heat in the third heater 230. The heat released by the heat exchange water in the third heater 230 may be heat transferred in the condenser 40. The heat released by the heat exchange water in the third heater 230 may be transferred to the heat medium. The heat released by the heat exchange water in the third heater 230 may be transferred to the heat medium circulating through a ninth line 9000.

[0243] The first line 1000 may include a first path or a second path. The first line 1000 may include a plurality of valves. The first line 1000 may change the flow path of the heat exchange water to the first path or the second path by combining a plurality of lines and a plurality of valves. Here, the plurality of lines and valves included in the first line 1000 are not limited to the lines and valves shown in FIG. 15, and it is sufficient if they can form the path of the heat exchange water described below.

[0244] The first line 1000 may transport the heat exchange water through a first path. Here, the first path means a path through which the heat exchange water is transported by the first line 1000, and may be a path through which the heat exchange water is discharged after sequentially passing through the condenser 40 and the third heater 230. When the heat exchange water is transported through the first path, the heat exchange water may absorb heat in the condenser 40 and release heat in the third heater 230.

[0245] A first valve 1310, a second valve 1320, and a third valve 1330 may be disposed on the first path. The first valve 1310 may be disposed in front of the condenser 40. Thus, when the first valve 1310 is opened, the heat exchange water may flow into the condenser 40. The second valve 1320 may be disposed in rear of the condenser 40 and in front of the third heater 230. Thus, when the second valve 1320 is opened, the heat exchange water may flow from the condenser 40 to the third heater 230. The third valve 1330 may be disposed in rear of the third heater 230. Thus, when the third valve 1330 is opened, the heat exchange water may be discharged to the outside.

[0246] When the heat exchange water flows through the first path, the first valve 1310, the second valve 1320, and the third valve 1330 may be opened. By opening the first valve 1310, the second valve 1320, and the third valve 1330, the heat exchange water may flow through the first path. The heat exchange water may sequentially pass through the first valve 1310, the condenser 40, the second valve 1320, the third heater 230, and the third valve 1330. In order for the heat exchange water to flow through the first path, the fourth valve 1340, the fifth valve 1350, and the sixth valve 1360 described below must be closed.

[0247] The first line 1000 may transport the heat exchange water through a second path. Here, the second path means a path through which the heat exchange water is transported by the first line 1000, and may be a path through which the heat exchange water is discharged after sequentially passing through the third heater 230 and the condenser 40. When the heat exchange water is transported through the second path, the heat exchange water may release heat in the third heater 230 and absorb heat in the condenser 40.

[0248] A fourth valve 1340, a fifth valve 1350, and a sixth valve 1360 may be disposed on the second path. The fourth valve 1340 may be disposed in front of the third heater 230. Also, the fourth valve 1340 may be disposed in front of the first valve 1310. When the fourth valve 1340 is opened, the heat exchange water may flow into the third heater 230. When the fourth valve 1340 is closed and the first valve 1310 is opened, the heat exchange water may flow into the first valve 1310. The fifth valve 1350 may be disposed in the rear of the third heater 230, and the fifth valve 1350 may be disposed in front of the condenser 40. Thus, when the fifth valve 1350 is opened, the heat exchange water flowing out of the third heater 230 may flow into the condenser 40. The sixth valve 1360 may be disposed in the rear of the condenser 40. When the sixth valve 1360 is opened, the heat exchange water flowing out from the condenser 40 can be discharged to the outside.

[0249] When the heat exchange water flows through the second path, the fourth valve 1340, the fifth valve 1350, and the sixth valve 1360 may be opened. By opening the fourth valve 1340, the fifth valve 1350, and the sixth valve 1360, the heat exchange water may flow through the second path. The heat exchange water may sequentially pass through the fourth valve 1340, the third heater 230, the fifth valve 1350, the condenser 40, and the sixth valve 1360. In order for the heat exchange water to flow through the second path, the first valve 1310, the second valve 1320, and the third valve 1330 must be closed.

[0250] The effect of the heat exchange water flowing through the first or second path will be described with reference to Fig. 13. Fig. 13 is a graph showing the annual seawater temperature distribution in the Samcheok area of ​​South Korea. Although the seawater temperature distribution in the Samcheok area is used as an example, it is obvious that the same effect can be obtained in any location where the seawater temperature distribution varies depending on the season, regardless of the area.

[0251] 13, it can be seen that the annual seawater temperature distribution is a minimum of 2.1° C. and a maximum of 28° C. In the season when the temperature of seawater used as heat exchange water is low, the heat absorption efficiency in the condenser 40 is high because the temperature of the seawater is low. Therefore, when seawater, which is heat exchange water, is caused to flow through the first path, the heat can be effectively absorbed in the condenser and then released in the third heater 230.

[0252] On the other hand, when the temperature of seawater used as heat exchange water is high, the temperature of the seawater is high and therefore the seawater can be used as a heat source for the third heater 230 without being heated by the condenser 40. Therefore, when the seawater, which is heat exchange water, is caused to flow through the second path, the seawater can release heat in the third heater 230 and then flow into the condenser 40 to absorb heat. Therefore, even when the temperature of the seawater is high, the heat absorption efficiency of the condenser 40 is improved.

[0253] The vaporizer 20 can vaporize the mixed fuel. The vaporizer 20 can vaporize the mixed fuel by using the heat medium flowing through the ninth line 9000 as a high-temperature heat source. The vaporizer 20 can vaporize the mixed fuel flowing into the vaporizer 20 through the second line 2000. The mixed fuel vaporized in the vaporizer 20 can flow out of the vaporizer 20 through the fourth line 4000.

[0254] The ninth line 9000 may be a line that circulates through the vaporizer 20 and the third heater 230. The ninth line 9000 may pass through the vaporizer 20 and the third heater 230. A heat medium may circulate through the ninth line 9000. The heat medium circulating through the ninth line 9000 may be heated by the third heater 230. The heat exchange water passing through the third heater 230 may heat the heat medium passing through the third heater 230. The heat medium circulating through the ninth line 9000 may be cooled by the vaporizer 20. The heat medium circulating through the ninth line 9000 may transfer heat to the mixed fuel in the vaporizer 20. The heat medium circulating through the ninth line 9000 may heat the mixed fuel in the vaporizer 20. Here, the heat medium may be triethylene glycol, for example.

[0255] The ninth line 9000 may include a ninth bypass line 9100. The ninth bypass line 9100 may pass through the first heater 210. The ninth bypass line 9100 may transfer the heat medium that has passed through the vaporizer 20 to the first heater 210. The ninth line 9000 may include a 9-1 valve 9110. The ninth bypass line 9100 may include a 9-2 valve 9120 and a 9-3 valve 9130. When the 9-1 valve 9110 is closed and the 9-2 valve 9120 and the 9-3 valve 9130 are opened, the heat medium may pass through the ninth bypass line 9100. That is, the heat medium may pass through the ninth bypass line 9100 and circulate through the ninth line 9000. When the 9-1 valve 9110 is opened and the 9-2 valve 9120 and the 9-3 valve 9130 are closed, the heat medium can circulate through the 9th line 9000 without passing through the 9th bypass line 9100.

[0256] Since heat exchange is not performed directly between the heat exchange water and the co-firing fuel but indirectly via a heat medium, corrosion, freezing, or damage to pipes, etc. that may occur due to a decrease in seawater temperature can be prevented.

[0257] The fourth line 4000 may transfer the mixed fuel vaporized in the vaporizer 20 to the first accumulator. The fourth line 4000 may pass through the second heater 220 and the second compressor 140. The mixed fuel transferred through the fourth line 4000 may be heated by the second heater 220. The mixed fuel heated by the second heater 220 and transferred through the fourth line 4000 may be compressed by the second compressor 140.

[0258] The second heater 220 may heat the co-fuel transferred via the fourth line 4000. The high temperature heat source of the second heater 220 may be blowdown water discharged from the boiler 30. The blowdown water may be a portion of the water discharged from the boiler 30 for removing impurities. The blowdown water may be a portion of the water heated in the boiler 30.

[0259] The eighth line 8000 may be connected to the boiler 30. The eighth line 8000 may pass through the second heater 220. The eighth line 8000 may transport blowdown water. The blowdown water may be routed through the second heater 220 via the eighth line 8000, and the blowdown water may be used as a high temperature heat source for the second heater 220.

[0260] The first accumulator may be connected to a fifth line 5000. The fifth line 5000 may transport the co-fuel in a gaseous state from the first accumulator to the boiler 30.

[0261] According to the power generation system, the heat exchange water heated by the condenser 40 is used as a high-temperature heat source for the vaporizer 20, which has the effect of reducing the energy used in the vaporizer 20. When seawater is used as the heat exchange water, the seawater that absorbs heat in the condenser 40 releases the heat in the vaporizer 20 or the first heater 210 and is discharged back into the sea, which can prevent thermal pollution of the sea. Since the heat exchange water and the co-fuel do not directly exchange heat with each other but indirectly exchange heat with each other using a heat medium, it is possible to prevent corrosion, freezing, or damage of piping and the like that may occur due to a reduction in seawater temperature. Furthermore, since the seawater and ammonia indirectly exchange heat with each other using a heat medium, it is possible to prevent contamination of the seawater in the event of damage to the ammonia piping.

[0262] Since the blowdown water generated in the boiler 30 is used as a high-temperature heat source for the second heater 220, it is possible to reduce the energy used for the second heater 220. In addition, since the mixed fuel evaporated in the low-pressure storage tank 100 (or the storage tank) is used as fuel for the boiler 30, there is an effect of reducing the amount of mixed fuel used.

[0263] <Thirteenth embodiment> 16 is a conceptual diagram showing a power generation system according to a thirteenth embodiment of the present invention. In the following, a description of the same parts as those in the above-mentioned power generation system may be omitted, and the differences may be mainly described.

[0264] The fuel supply system may include a low pressure storage tank 100 , a first accumulator, a first line 1000 , a second line 2000 , a third line 3000 and a fifth line 5000 .

[0265] The low pressure storage tank 100 (or storage tank) can store the mixed fuel. The storage tank 100 can store the liquefied mixed fuel. The mixed fuel can be combusted in the boiler 30. The mixed fuel can be combusted in the boiler 30 together with the fossil fuel. The mixed fuel can be ammonia, as an example.

[0266] The low pressure storage tank 100 (or storage tank) may be connected to the second line 2000. The second line 2000 may transfer the mixed fuel stored in the low pressure storage tank 100 (or storage tank) in a liquid state. The second line 2000 may be connected to the first pump 110, the condenser 40, and the first accumulator. The second line 2000 may transfer the mixed fuel stored in the low pressure storage tank 100 (or storage tank) in a liquid state to the first pump 110, transfer the mixed fuel pressurized by the first pump 110 to the condenser 40, and transfer the mixed fuel vaporized by the condenser 40 to the first accumulator.

[0267] The low pressure storage tank 100 (or storage tank) may be connected to the third line 3000. The third line 3000 may be disposed on the upper part of the low pressure storage tank 100 (or storage tank). The third line 3000 may transport the mixed fuel stored in the low pressure storage tank 100 (or storage tank) in a gaseous state. The third line 3000 may transport the mixed fuel evaporated in the low pressure storage tank 100 (or storage tank). The third line 3000 may be connected to the first compressor 120 and the first accumulator. The third line 3000 may transport the mixed fuel evaporated in the low pressure storage tank 100 (or storage tank) from the low pressure storage tank 100 (or storage tank) to the first compressor 120, and transport the mixed fuel compressed in the first compressor 120 to the first accumulator.

[0268] The first line 1000 can transport heat exchange water. The heat exchange water may be seawater. The first line 1000 can pass through a condenser 40. The heat exchange water transported through the first line 1000 can pass through the condenser 40.

[0269] The heat exchange water may be heated in the condenser 40. The heat exchange water may absorb heat in the condenser 40. The heat absorbed by the heat exchange water in the condenser 40 may be heat released by steam that passes through the turbine and is condensed in the condenser 40. Heat may be transferred to the heat exchange water from the steam transferred through the sixth line 6000 in the condenser 40.

[0270] The condenser 40 may condense steam discharged from the turbine. A first line 1000, a second line 2000, and a sixth line 6000 may pass through the condenser 40. Heat exchange may be performed in the condenser 40. The steam transferred through the sixth line 6000 may be condensed in the condenser 40 and release heat. The mixed fuel transferred through the second line 2000 may be vaporized by heat transfer in the condenser 40. In this case, the heat transferred to the mixed fuel may be heat released by condensing the steam transferred through the sixth line 6000. Heat may be transferred from the condenser 40 to the heat exchange water transferred through the first line 1000. In this case, heat released by condensing the steam transferred through the sixth line 6000 may be transferred to the heat exchange water. However, when the heat released when the steam transported through the sixth line 6000 is condensed is entirely transferred to the mixed fuel transported through the second line 2000, the heat exchange water can be discharged without heat exchange in the condenser 40.

[0271] The first accumulator may be connected to a third line 3000. The multi-fuel vaporized in the low pressure storage tank 100 (or the storage tank) may be transferred to the first accumulator via the third line 3000. The first accumulator may be connected to a second line 2000. The second line 2000 may transfer the multi-fuel vaporized in the condenser 40 to the first accumulator. The first accumulator may be connected to a fifth line 5000. The fifth line 5000 may transfer the gaseous multi-fuel from the first accumulator to the boiler 30.

[0272] According to the power generation system, the mixed fuel is vaporized using heat released from the steam condensed in the condenser 40, which has the effect of reducing the energy used for vaporizing the mixed fuel.

[0273] In addition, since the mixed fuel evaporated in the low pressure storage tank 100 (or the storage tank) is used as fuel for the boiler 30, there is an effect of reducing the amount of mixed fuel used.

[0274] <Fourteenth embodiment> 17 is a conceptual diagram showing a power generation system according to a fourteenth embodiment of the present invention. In the following, a description of the same parts as those in the power generation system described above may be omitted, and differences will be mainly described.

[0275] The fuel supply system may include a low pressure storage tank 100 , a first accumulator, a first line 1000 , a second line 2000 , a third line 3000 , a fifth line 5000 , and a first heater 210 .

[0276] The low pressure storage tank 100 (or storage tank) can store the mixed fuel. The storage tank 100 can store the liquefied mixed fuel. The mixed fuel can be combusted in the boiler 30. The mixed fuel can be combusted in the boiler 30 together with the fossil fuel. The mixed fuel can be ammonia, as an example.

[0277] The low pressure storage tank 100 (or storage tank) may be connected to the second line 2000. The second line 2000 may transfer the mixed fuel stored in the low pressure storage tank 100 (or storage tank) in a liquid state. The second line 2000 may be connected to the first pump 110, the condenser 40, and the first accumulator. The second line 2000 may transfer the mixed fuel stored in the low pressure storage tank 100 (or storage tank) in a liquid state to the first pump 110, transfer the mixed fuel pressurized by the first pump 110 to the condenser 40, and transfer the mixed fuel vaporized by the condenser 40 to the first accumulator.

[0278] The low pressure storage tank 100 (or storage tank) may be connected to the third line 3000. The third line 3000 may be disposed on the upper part of the low pressure storage tank 100 (or storage tank). The third line 3000 may transport the multi-fuel stored in the low pressure storage tank 100 (or storage tank) in a gaseous state. The third line 3000 may transport the multi-fuel evaporated in the low pressure storage tank 100 (or storage tank). The third line 3000 may be connected to the first compressor 120, the first heater 210, and the first accumulator. The third line 3000 can transport the mixed fuel evaporated in the low-pressure storage tank 100 (or storage tank) from the low-pressure storage tank 100 (or storage tank) to the first compressor 120, transport the mixed fuel compressed in the first compressor 120 to the first heater 210, and transport the mixed fuel heated in the first heater 210 to the first accumulator.

[0279] The first line 1000 can transport heat exchange water. The heat exchange water may be seawater. The first line 1000 can pass through a condenser 40. The heat exchange water transported through the first line 1000 can pass through the condenser 40.

[0280] The heat exchange water may be heated in the condenser 40. The heat exchange water may absorb heat in the condenser 40. The heat absorbed by the heat exchange water in the condenser 40 may be heat generated from steam that passes through the turbine and is condensed in the condenser 40. Heat may be transferred to the heat exchange water from steam transferred through the sixth line 6000 in the condenser 40.

[0281] The condenser 40 may condense steam discharged from the turbine. A first line 1000, a second line 2000, and a sixth line 6000 may pass through the condenser 40. Heat exchange may be performed in the condenser 40. The steam transferred through the sixth line 6000 may be condensed in the condenser 40 and release heat. The mixed fuel transferred through the second line 2000 may be vaporized by heat transfer in the condenser 40. In this case, the heat transferred to the mixed fuel may be heat released by condensing the steam transferred through the sixth line 6000. Heat may be transferred from the condenser 40 to the heat exchange water transferred through the first line 1000. In this case, heat released by condensing the steam transferred through the sixth line 6000 may be transferred to the heat exchange water. However, when the heat released when the steam transported through the sixth line 6000 is condensed is entirely transferred to the mixed fuel transported through the second line 2000, the heat exchange water can be discharged without heat exchange in the condenser 40.

[0282] The first heater 210 may be disposed on the third line 3000. The third line 3000 may pass through the first heater 210. The first heater 210 may heat the co-combustion fuel transferred through the third line 3000. The heat source of the first heater 210 may be an external heat source. For example, the heat source of the first heater 210 may be a heat source using electricity.

[0283] The first accumulator may be connected to a third line 3000. The multi-fuel vaporized in the low pressure storage tank 100 (or the storage tank) may be transferred to the first accumulator via the third line 3000. The first accumulator may be connected to a second line 2000. The second line 2000 may transfer the multi-fuel vaporized in the condenser 40 to the first accumulator. The first accumulator may be connected to a fifth line 5000. The fifth line 5000 may transfer the gaseous multi-fuel from the first accumulator to the boiler 30.

[0284] According to the power generation system, the mixed fuel is vaporized using heat released from the steam condensed in the condenser 40, which has the effect of reducing the energy used for vaporizing the mixed fuel.

[0285] In addition, since the mixed fuel evaporated in the low pressure storage tank 100 (or the storage tank) is used as fuel for the boiler 30, there is an effect of reducing the amount of mixed fuel used.

[0286] <Fifteenth embodiment> 18 is a conceptual diagram showing a power generation system according to a fifteenth embodiment of the present invention. In the following, a description of the same parts as those in the power generation systems described above may be omitted, and differences will be mainly described.

[0287] The fuel supply system may include a low pressure storage tank 100 , a first accumulator, a first line 1000 , a second line 2000 , a third line 3000 , a fifth line 5000 , and a first heater 210 .

[0288] The low pressure storage tank 100 (or storage tank) can store the mixed fuel. The low pressure storage tank 100 (or storage tank) can store the liquefied mixed fuel. The mixed fuel can be combusted in the boiler 30. The mixed fuel can be combusted in the boiler 30 together with the fossil fuel. The mixed fuel may be ammonia, as an example.

[0289] The low pressure storage tank 100 (or storage tank) may be connected to the second line 2000. The second line 2000 may transfer the mixed fuel stored in the low pressure storage tank 100 (or storage tank) in a liquid state. The second line 2000 may be connected to the first pump 110, the first heater 210, the condenser 40, and the first accumulator. The second line 2000 may transfer the mixed fuel stored in the low pressure storage tank 100 (or storage tank) in a liquid state to the first pump 110, and transfer the mixed fuel pressurized by the first pump 110 to the first heater 210. In addition, the second line 2000 may transfer the mixed fuel heated by the first heater 210 to the condenser 40, and transfer the mixed fuel vaporized by the condenser 40 to the first accumulator.

[0290] The low pressure storage tank 100 (or storage tank) may be connected to the third line 3000. The third line 3000 may be disposed on the upper part of the low pressure storage tank 100 (or storage tank). The third line 3000 may transport the mixed fuel stored in the low pressure storage tank 100 (or storage tank) in a gaseous state. The third line 3000 may transport the mixed fuel evaporated in the low pressure storage tank 100 (or storage tank). The third line 3000 may be connected to the first compressor 120 and the first accumulator. The third line 3000 may transport the mixed fuel evaporated in the low pressure storage tank 100 (or storage tank) from the low pressure storage tank 100 (or storage tank) to the first compressor 120, and transport the mixed fuel compressed in the first compressor 120 to the first accumulator.

[0291] The first line 1000 can transport heat exchange water. The heat exchange water may be seawater. The first line 1000 can sequentially pass through the condenser 40 and the first heater 210. The heat exchange water can sequentially pass through the condenser 40 and the first heater 210 via the first line 1000.

[0292] The heat exchange water may be heated in the condenser 40. The heat exchange water may absorb heat in the condenser 40. The heat absorbed by the heat exchange water in the condenser 40 may be heat generated from steam passing through the turbine and condensed in the condenser 40. Heat may be transferred to the heat exchange water from steam transferred through the sixth line 6000 in the condenser 40. The heat exchange water heated in the condenser 40 may release heat in the first heater 210. The heat exchange water heated in the condenser 40 may be used as a high-temperature heat source for the first heater 210. The heat released by the heat exchange water in the first heater 210 may be transferred to the multi-fuel passing through the first heater 210. The heat released by the heat exchange water in the first heater 210 may heat the multi-fuel passing through the first heater 210.

[0293] The condenser 40 may condense steam discharged from the turbine. A first line 1000, a second line 2000, and a sixth line 6000 may pass through the condenser 40. Heat exchange may be performed in the condenser 40. The steam transferred through the sixth line 6000 may be condensed in the condenser 40 and release heat. The mixed fuel transferred through the second line 2000 may be vaporized by heat transfer in the condenser 40. In this case, the heat transferred to the mixed fuel may be heat released by condensing the steam transferred through the sixth line 6000. Heat may be transferred from the condenser 40 to the heat exchange water transferred through the first line 1000. In this case, heat released by condensing the steam transferred through the sixth line 6000 may be transferred to the heat exchange water. However, when the heat released when the steam transported through the sixth line 6000 is condensed is entirely transferred to the mixed fuel transported through the second line 2000, the heat exchange water can be discharged without heat exchange in the condenser 40.

[0294] The first heater 210 may be disposed on the second line 2000. The second line 2000 may pass through the first heater 210. The first heater 210 may heat the co-combustion fuel transferred via the second line 2000. The high-temperature heat source of the first heater 210 may be heat exchange water transferred via the first line 1000. The heat exchange water heated in the condenser 40 may be used as the high-temperature heat source of the first heater 210.

[0295] The first accumulator may be connected to a third line 3000. The multi-fuel vaporized in the low pressure storage tank 100 (or the storage tank) may be transferred to the first accumulator via the third line 3000. The first accumulator may be connected to a second line 2000. The second line 2000 may transfer the multi-fuel vaporized in the condenser 40 to the first accumulator. The first accumulator may be connected to a fifth line 5000. The fifth line 5000 may transfer the gaseous multi-fuel from the first accumulator to the boiler 30.

[0296] According to the power generation system, the mixed fuel is vaporized using heat released from the steam condensed in the condenser 40, which has the effect of reducing the energy used for vaporizing the mixed fuel.

[0297] In addition, since the mixed fuel evaporated in the low pressure storage tank 100 (or the storage tank) is used as fuel for the boiler 30, there is an effect of reducing the amount of mixed fuel used.

[0298] Furthermore, since heat exchange water and the co-fuel fuel exchange heat in the first heater, the heat exchange load with the sixth line 6000 of the condensed water that has passed through the turbine in the vaporizer can be adjusted and designed.

[0299] Although various embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and it is obvious to a person having average knowledge in the art that various modifications and variations are possible within the scope of the technical idea of ​​the present invention described in the claims. In addition, some components in the above-mentioned embodiments may be omitted, and each embodiment may be combined with each other.

Claims

1. 1. A fuel supply system for vaporizing a mixed fuel to be supplied to a power generation system, comprising: a condenser for condensing steam transferred from a turbine of the power generation system; A storage tank in which the mixed fuel is liquefied and stored; A vaporizer that vaporizes the mixed fuel transferred from the storage tank; a first line passing through the condenser and the vaporizer; Heat exchange water is transferred through the first line, The heat exchange water is heated in the condenser, The vaporizer vaporizes the mixed fuel with the heat exchange water heated by the condenser, a fuel supply system that supplies the mixed fuel vaporized in the vaporizer to the power generation system;

2. a second line and a third line connected to the storage tank; The second line transports the mixed fuel in a liquid state to the vaporizer, The third line transports the mixed fuel evaporated in the storage tank, The fuel supply system according to claim 1 , further comprising: a fuel supply unit configured to supply the multi-fuel vaporized in the vaporizer and the multi-fuel transferred via the third line to the power generation system.

3. A fourth line for transporting the mixed fuel vaporized in the vaporizer; a first heater disposed between the vaporizer and a boiler of the power generation system; the first line includes a first branch line, The first branch line is disposed behind the condenser and transports at least a portion of the heat exchange water heated by the condenser to the first heater; The fuel supply system according to claim 1 , wherein the first heater heats the multi-fuel mixture transferred via the fourth line.

4. 3. The fuel delivery system of claim 2 including a second heater disposed aft of said first heater.

5. the third line passes through a third heater; The fuel supply system according to claim 4 , wherein the multi-fuel mixture transferred through the third line is heated by the third heater.

6. The fuel supply system according to claim 2 , wherein the third line transports the multi-fuel vaporized in the storage tank to the vaporizer.

7. A fourth line for transporting the mixed fuel vaporized in the vaporizer; a first heater disposed between the vaporizer and a boiler of the power generation system; the first line includes a first branch line, The first branch line is disposed behind the condenser and transports at least a portion of the heat exchange water heated by the condenser to the first heater; The fuel supply system according to claim 6 , wherein the first heater heats the multi-fuel mixture transferred via the fourth line.

8. a fourth line for transferring the mixed fuel vaporized in the vaporizer to a first accumulator; The fuel supply system according to claim 2 , wherein the third line is connected to the fourth line to transfer the multi-fuel vaporized in the storage tank to the fourth line.

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