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 that supplies multi-fuel combustion fuel to a power generation system. [Background technology]

[0002] As global warming worsens, efforts are being made worldwide to reduce greenhouse gas emissions. In particular, with the 1997 Kyoto Protocol, which mandated greenhouse gas reductions for developed countries, expiring 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 boiler fuel. 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 vaporizes a mixed-fuel mixture 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 mixture is liquefied and stored, a vaporizer that vaporizes the mixed-fuel mixture 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 mixture 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 system 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 after 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 transfers the multi-fuel 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 after 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 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. [Effects of the Invention]

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

[0013] [Figure 1] FIG. 1 is a conceptual diagram of a conventional power generation system that uses mixed fuels. [Figure 2] 1 is a conceptual diagram showing a power generation system according to the present invention. [Figure 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. [Figure 5] FIG. 10 is a conceptual diagram showing a power generation system according to a third embodiment of the present invention. [Figure 6] FIG. 10 is a conceptual diagram showing a power generation system according to a fourth embodiment of the present invention. [Figure 7] FIG. 10 is a conceptual diagram showing a power generation system according to a fifth embodiment of the present invention. [Figure 8] FIG. 10 is a conceptual diagram showing a power generation system according to a sixth embodiment of the present invention. [Figure 9] FIG. 10 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. 22 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 temperature in the Samcheok region of South Korea. [Figure 14] FIG. 20 is a conceptual diagram showing a power generation system according to an eleventh embodiment of the present invention. [Figure 15] FIG. 22 is a conceptual diagram showing a power generation system according to a twelfth embodiment of the present invention. [Figure 16] FIG. 22 is a conceptual diagram showing a power generation system according to a thirteenth embodiment of the present invention. [Figure 17] FIG. 22 is a conceptual diagram showing a power generation system according to a fourteenth embodiment of the present invention. [Figure 18] FIG. 22 is a conceptual diagram showing a power generation system according to a fifteenth embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0014] Prior to the detailed description of the present invention, the terms and words used in the 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 idea of ​​the present invention, in accordance with the principle that the inventor can appropriately define the concept 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 represent the entire technical idea of ​​the present invention, and therefore, various equivalents and modifications that can replace them may exist at the time of filing of the present invention.

[0015] In the following description, the singular includes the plural unless the context clearly dictates otherwise. It should be understood that the terms "comprise" and "comprise" specify the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not preclude the presence or possibility of adding one or more other features, number, step, operation, component, part, or combination thereof.

[0016] In addition, in the following description, expressions such as upper, top, lower, bottom, side, front, and back are expressed 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 this specification and claims, terms including ordinal numbers such as "first," "second," etc. may be used to distinguish between elements. Such ordinal numbers are used to distinguish between identical or similar elements, and the use of such ordinal numbers should not be interpreted as limiting the meaning of the terms. For example, the order of use or arrangement of elements combined with such ordinal numbers should not be interpreted as being limited by the numbers. If necessary, each ordinal number may be used interchangeably.

[0018] Hereinafter, embodiments 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 illustrated embodiments. 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 clarity.

[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, and each pipe may also 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 related techniques are well 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. The fluid 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 burn a fuel to generate steam. 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, which is a mixture of two or more fuels. 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. In other words, the boiler 30 can burn ammonia or hydrogen while excluding a portion of the conventional fossil fuel. Because a portion of the fossil fuel burned in the boiler 30 is eliminated, carbon dioxide generated by combustion can be reduced compared to burning only fossil fuels.

[0023] The steam generated in the boiler 30 can be transferred to a turbine along a sixth line 6000. The turbine can be a steam turbine. The turbine can use the steam transferred via the sixth line 6000 to rotate blades. The rotation of the blades can 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 can be pressurized by a pump and transferred again to the boiler 30. The fluid transferred to the boiler 30 can be circulated through the 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 a mixed fuel. The storage tank 10 can store a 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 a 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 liquid 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 mixed-fuel stored in the storage tank 10 to the vaporizer 20.

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

[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 via 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 multi-fuel mixture. The vaporizer 20 may vaporize the multi-fuel mixture using 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 multi-fuel mixture stored in the storage tank 10 to the vaporizer 20. The multi-fuel mixture transferred through the second line 2000 may be vaporized in the vaporizer 20. The vaporizer 20 may vaporize the multi-fuel mixture using heat exchange water heated by the condenser 40 as a high-temperature heat source. The multi-fuel mixture 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 vaporized multi-fuel to the boiler. Because the technology related to the first accumulator is well known, the structure, operating principle, etc. of the first accumulator can be omitted. The first accumulator can be connected to the third line 3000. The multi-fuel evaporated in the storage tank 10 can be transferred to the first accumulator via the third line 3000. The first accumulator can be connected to the fourth line 4000. The fourth line 4000 can transfer the multi-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 gaseous multi-fuel from the first accumulator to the boiler 30.

[0034] 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, which has the effect of reducing the energy used in the vaporizer 20. 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.

[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, explanations of the same parts as those in the power generation system described above can be omitted, and differences can 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 a mixed fuel. The storage tank 10 can store a 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 a 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 mixed-fuel stored in the storage tank 10. The second line 2000 may be connected to a vaporizer 20. The second line 2000 may transport the liquid mixed-fuel stored in the storage tank 10 to the vaporizer 20.

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

[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 from the condenser 40 via the sixth line 6000. 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. If the side of the first line 1000 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 of 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. 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 evaporator 20. The first branch line 1100 may pass through the first heater 210. The heat exchange water may pass through the first heater 210 via 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 via 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 combustion fuel in the first heater 210.

[0043] The vaporizer 20 may vaporize the multi-fuel mixture. The vaporizer 20 may vaporize the multi-fuel mixture using 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 multi-fuel mixture stored in the storage tank 10 to the vaporizer 20. The multi-fuel mixture transferred through the second line 2000 may be vaporized in the vaporizer 20. The vaporizer 20 may vaporize the multi-fuel mixture using heat exchange water heated by the condenser 40 as a high-temperature heat source. The multi-fuel mixture 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 co-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-combustion fuel heated by the first heater 210. The high-temperature heat source of the second heater 220 may be an independent heat source. For example, the high-temperature heat source of the second heater 220 may be a heating element that uses electrical energy, or may be hot water or steam, for example.

[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. For example, the high-temperature heat source of the third heater 230 may be a heating element using electrical energy, or may be hot water or steam, for example.

[0047] The fourth line 4000 may transfer the multi-fuel 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 multi-fuel mixture vaporized 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 multi-fuel mixture 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 gaseous multi-fuel mixture from the first accumulator to the boiler 30.

[0049] According to the power generation system, 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, thereby reducing the energy used in the vaporizer 20 and the first heater 210. When seawater is used as the heat exchange water, the seawater absorbs heat in the condenser 40, releases the heat in the vaporizer 20 and the first heater 210, and is then released back into the sea, preventing thermal pollution of the sea. In addition, the co-fuel evaporated in the storage tank 10 is used as fuel for the boiler 30, thereby reducing the amount of co-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, explanations of the same parts as those in the power generation system described above can be omitted, and the 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 a mixed fuel. The storage tank 10 can store a 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 a 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 mixed-fuel stored in the storage tank 10. The second line 2000 may be connected to a vaporizer 20. The second line 2000 may transport the liquid mixed-fuel stored in the storage tank 10 to the vaporizer 20.

[0054] The storage tank 10 may be connected to a third line 3000. The third line 3000 may be disposed on top 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. 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 multi-fuel evaporated in the storage tank 10 from the storage tank 10 to the vaporizer 20. The multi-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 multi-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 sequentially.

[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 from the condenser 40 via the sixth line 6000. 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. If the side of the first line 1000 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 of 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. 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 evaporator 20. The first branch line 1100 may pass through the first heater 210. The heat exchange water may pass through the first heater 210 via 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 via 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 combustion fuel in the first heater 210.

[0058] The vaporizer 20 may vaporize the multi-fuel mixture. The vaporizer 20 may vaporize the multi-fuel mixture using 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 multi-fuel mixture stored in the storage tank 10 to the vaporizer 20. The multi-fuel mixture transferred through the second line 2000 may be vaporized in the vaporizer 20. The vaporizer 20 may vaporize the multi-fuel mixture using heat exchange water heated by the condenser 40 as a high-temperature heat source. The multi-fuel mixture 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 co-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-combustion fuel heated by the first heater 210. The high-temperature heat source of the second heater 220 may be an independent heat source. For example, the high-temperature heat source of the second heater 220 may be a heating element that uses electrical energy, or may be hot water or steam, for example.

[0061] The fourth line 4000 may transfer the multi-fuel 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 multi-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 gaseous multi-fuel from the first accumulator to the boiler 30.

[0063] According to the power generation system, 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, thereby reducing the energy used in the vaporizer 20 and the first heater 210. When seawater is used as the heat exchange water, the seawater absorbs heat in the condenser 40, releases the heat in the vaporizer 20 and the first heater 210, and is then released back into the sea, preventing thermal pollution of the sea. In addition, the co-fuel evaporated in the storage tank 10 is used as fuel for the boiler 30, thereby reducing the amount of co-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, explanations of the same parts as those in the power generation system described above can 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 a mixed fuel. The storage tank 10 can store a 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 a 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 multi-fuel stored in the storage tank 10 in a liquid state. The second line 2000 may be connected to a vaporizer 20. The second line 2000 may transfer the multi-fuel stored in the storage tank 10 to the vaporizer 20 in a liquid state.

[0068] The storage tank 10 may be connected to a third line 3000. The third line 3000 may be disposed on top 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 a fourth line 4000. The third line 3000 may transport the multi-fuel evaporated in the storage tank 10 from the storage tank 10 to the fourth line 4000. The multi-fuel transported to the fourth line 4000 via the third line 3000 may be mixed with the multi-fuel vaporized 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 sequentially.

[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 from the condenser 40 via the sixth line 6000. 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. If the side of the first line 1000 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 of 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. 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 evaporator 20. The first branch line 1100 may pass through the first heater 210. The heat exchange water may pass through the first heater 210 via 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 via 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 combustion fuel in the first heater 210.

[0072] The vaporizer 20 may vaporize the multi-fuel mixture. The vaporizer 20 may vaporize the multi-fuel mixture using 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 multi-fuel mixture stored in the storage tank 10 to the vaporizer 20. The multi-fuel mixture transferred through the second line 2000 may be vaporized in the vaporizer 20. The vaporizer 20 may vaporize the multi-fuel mixture using heat exchange water heated by the condenser 40 as a high-temperature heat source. The multi-fuel mixture 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 co-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-combustion fuel heated by the first heater 210. The high-temperature heat source of the second heater 220 may be an independent heat source. For example, the high-temperature heat source of the second heater 220 may be a heating element that uses electrical energy, or may be hot water or steam, for example.

[0075] The fourth line 4000 may transfer the multi-fuel fuel evaporated in the vaporizer 20 to the first accumulator. The fourth line 4000 may transfer the multi-fuel 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 multi-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 gaseous multi-fuel from the first accumulator to the boiler 30.

[0077] According to the power generation system, 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 absorbs heat in the condenser 40, releases the heat in the vaporizer 20 and the first heater 210, and is then released back into the sea, which prevents thermal pollution of the sea. In addition, the co-fuel evaporated in the storage tank 10 is used as fuel for the boiler 30, which has the effect of reducing the amount of co-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, explanations of the same parts as in the power generation systems described above can be omitted, and differences can 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 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.

[0080] The low-pressure storage tank 100 (or storage tank) can store a mixed fuel. The low-pressure storage tank 100 (or storage tank) can store a 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 a fossil fuel. The mixed fuel may be ammonia, for example.

[0081] The low-pressure storage tank 100 (or storage tank) may be connected to a second line 2000. The second line 2000 may transfer the liquid-state multi-fuel stored in the low-pressure storage tank 100 (or storage tank). The second line 2000 may be connected to the vaporizer 20. The second line 2000 may transfer the liquid-state multi-fuel 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 liquid-state multi-fuel stored in the low-pressure storage tank 100 (or storage tank) to the vaporizer 20.

[0082] The low-pressure storage tank 100 (or storage tank) may be connected to a third line 3000. The third line 3000 may be disposed on top 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 a third heater 230. The third line 3000 may transport the multi-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 multi-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 multi-fuel pressurized by the first pump 110 can be transferred to the vaporizer 20 via the second line 2000.

[0084] 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 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 sequentially.

[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 from the condenser 40 via the sixth line 6000. 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. If the side of the first line 1000 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 of 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. 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 evaporator 20. The first branch line 1100 may pass through the first heater 210. The heat exchange water may pass through the first heater 210 via 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 via 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 combustion fuel in the first heater 210.

[0088] The vaporizer 20 may vaporize the multi-fuel mixture. The vaporizer 20 may vaporize the multi-fuel mixture using 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 multi-fuel mixture stored in the low-pressure storage tank 100 (or a storage tank) to the vaporizer 20. The multi-fuel mixture transferred through the second line 2000 may be vaporized in the vaporizer 20. The vaporizer 20 may vaporize the multi-fuel mixture using heat exchange water heated by the condenser 40 as a high-temperature heat source. The multi-fuel mixture 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 co-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-combustion fuel heated by the first heater 210. The high-temperature heat source of the second heater 220 may be an independent heat source. For example, the high-temperature heat source of the second heater 220 may be a heating element that uses electrical energy, or may be hot water or steam, for example.

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

[0092] The fourth line 4000 may transfer the multi-fuel 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 multi-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 gaseous multi-fuel 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 absorbs heat in the condenser 40, releases the heat in the vaporizer 20 and the first heater 210, and is then released back into the sea, which prevents thermal pollution of the sea. In addition, the co-fuel evaporated in the low-pressure storage tank 100 (or storage tank) is used as fuel for the boiler 30, which has the effect of reducing the amount of co-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, explanations of the same parts as those in the power generation systems described above can be omitted, and the 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 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.

[0097] The low-pressure storage tank 100 (or storage tank) can store a mixed fuel. The low-pressure storage tank 100 (or storage tank) can store a 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 a fossil fuel. The mixed fuel may be ammonia, for example.

[0098] The low-pressure storage tank 100 (or storage tank) may be connected to a second line 2000. The second line 2000 may transfer the liquid-state multi-fuel stored in the low-pressure storage tank 100 (or storage tank). The second line 2000 may be connected to the vaporizer 20. The second line 2000 may transfer the liquid-state multi-fuel 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 liquid-state multi-fuel stored in the low-pressure storage tank 100 (or storage tank) to the vaporizer 20.

[0099] The low-pressure storage tank 100 (or storage tank) may be connected to a third line 3000. The third line 3000 may be disposed on top 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 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 multi-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 multi-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 multi-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 multi-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 vaporized 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 a 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 sequentially.

[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 from the condenser 40 via the sixth line 6000. 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. If the side of the first line 1000 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 of 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. 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 evaporator 20. The first branch line 1100 may pass through the first heater 210. The heat exchange water may pass through the first heater 210 via 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 via 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 combustion fuel in the first heater 210.

[0105] The vaporizer 20 may vaporize the multi-fuel mixture. The vaporizer 20 may vaporize the multi-fuel mixture using 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 multi-fuel mixture stored in the low-pressure storage tank 100 (or a storage tank) to the vaporizer 20. The multi-fuel mixture transferred through the second line 2000 may be vaporized in the vaporizer 20. The vaporizer 20 may vaporize the multi-fuel mixture using heat exchange water heated by the condenser 40 as a high-temperature heat source. The multi-fuel mixture 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 co-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-combustion fuel heated by the first heater 210. The high-temperature heat source of the second heater 220 may be an independent heat source. For example, the high-temperature heat source of the second heater 220 may be a heating element that uses electrical energy, or may be hot water or steam, for example.

[0108] The fourth line 4000 may transfer the multi-fuel 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 multi-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 gaseous multi-fuel 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 absorbs heat in the condenser 40, releases the heat in the vaporizer 20 and the first heater 210, and is then released back into the sea, which prevents thermal pollution of the sea. In addition, the co-fuel evaporated in the low-pressure storage tank 100 (or storage tank) is used as fuel for the boiler 30, which has the effect of reducing the amount of co-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, explanations of the same parts as those in the power generation systems described above can be omitted, and differences will 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 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.

[0113] The low-pressure storage tank 100 (or storage tank) can store a mixed fuel. The low-pressure storage tank 100 (or storage tank) can store a 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 a fossil fuel. The mixed fuel may be ammonia, for example.

[0114] The low-pressure storage tank 100 (or storage tank) may be connected to a second line 2000. The second line 2000 may transfer the liquid-state multi-fuel stored in the low-pressure storage tank 100 (or storage tank). The second line 2000 may be connected to the vaporizer 20. The second line 2000 may transfer the liquid-state multi-fuel 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 liquid-state multi-fuel stored in the low-pressure storage tank 100 (or storage tank) 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 top 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 fourth line 4000. The third line 3000 may transport the multi-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 multi-fuel transported to the fourth line 4000 via the third line 3000 may be mixed with the multi-fuel vaporized in the vaporizer 20.

[0116] The first pump 110 can pressurize the liquid-state multi-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 multi-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 sequentially.

[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 from the condenser 40 via the sixth line 6000. 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. If the side of the first line 1000 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 of 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. 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 evaporator 20. The first branch line 1100 may pass through the first heater 210. The heat exchange water may pass through the first heater 210 via 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 via 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 combustion fuel in the first heater 210.

[0121] The vaporizer 20 may vaporize the multi-fuel mixture. The vaporizer 20 may vaporize the multi-fuel mixture using 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 multi-fuel mixture stored in the low-pressure storage tank 100 (or a storage tank) to the vaporizer 20. The multi-fuel mixture transferred through the second line 2000 may be vaporized in the vaporizer 20. The vaporizer 20 may vaporize the multi-fuel mixture using heat exchange water heated by the condenser 40 as a high-temperature heat source. The multi-fuel mixture 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 co-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-combustion fuel heated by the first heater 210. The high-temperature heat source of the second heater 220 may be an independent heat source. For example, the high-temperature heat source of the second heater 220 may be a heating element that uses electrical energy, or may be hot water or steam, for example.

[0124] The fourth line 4000 may transfer the multi-fuel 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 multi-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 gaseous multi-fuel 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 absorbs heat in the condenser 40, releases the heat in the vaporizer 20 and the first heater 210, and is then released back into the sea, which prevents thermal pollution of the sea. In addition, the co-fuel evaporated in the low-pressure storage tank 100 (or storage tank) is used as fuel for the boiler 30, which has the effect of reducing the amount of co-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, explanations of the same parts as those in the power generation systems described above can 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 a mixed fuel. The storage tank 10 can store a 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 a 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 liquid mixed-fuel stored in the storage tank 10. The second line 2000 may be connected to a vaporizer 20. The second line 2000 may transport the liquid mixed-fuel stored in the storage tank 10 to the vaporizer 20.

[0131] The storage tank 10 may be connected to a third line 3000. The third line 3000 may be disposed on top of the storage tank 10. The third line 3000 may transfer the multi-fuel stored in the storage tank 10 in a gaseous state. The third line 3000 may transfer the multi-fuel evaporated in the storage tank 10. The third line 3000 may be connected to the first accumulator via a reformer 50, which will be described later. The third line 3000 may transfer the multi-fuel evaporated in the storage tank 10 from the storage tank 10 to the first accumulator via 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 sequentially.

[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 from the condenser 40 via the sixth line 6000. 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. If the side of the first line 1000 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 of 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. 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 evaporator 20. The first branch line 1100 may pass through the first heater 210. The heat exchange water may pass through the first heater 210 via 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 via 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 combustion fuel in the first heater 210.

[0135] The vaporizer 20 may vaporize the multi-fuel mixture. The vaporizer 20 may vaporize the multi-fuel mixture using 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 multi-fuel mixture stored in the storage tank 10 to the vaporizer 20. The multi-fuel mixture transferred through the second line 2000 may be vaporized in the vaporizer 20. The vaporizer 20 may vaporize the multi-fuel mixture using heat exchange water heated by the condenser 40 as a high-temperature heat source. The multi-fuel mixture 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 co-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-combustion fuel heated by the first heater 210. The high-temperature heat source of the second heater 220 may be an independent heat source. For example, the high-temperature heat source of the second heater 220 may be a heating element that uses electrical energy, or may be hot water or steam, for example.

[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 well known, 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 multi-fuel vaporized in the storage tank 10 to the reformer 50. The reformer 50 may produce hydrogen using the multi-fuel transferred via the third line 3000. In this case, the multi-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 multi-fuel transferred via the fourth line 4000 to the reformer 50. The reformer 50 may produce hydrogen using the multi-fuel transferred from the fourth branch line. In this case, the multi-fuel may be ammonia.

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

[0142] The fourth line 4000 may transfer the multi-fuel vaporized 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 multi-fuel transferred via 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 multi-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 gaseous multi-fuel from the first accumulator to the boiler 30.

[0144] According to the power generation system, heat exchange water heated in 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 and the first heater 210. When seawater is used as the heat exchange water, the seawater absorbs heat in the condenser 40, releases the heat in the vaporizer 20 and the first heater 210, and is then released back into the sea, preventing thermal pollution of the sea. In addition, hydrogen is produced using a mixed fuel, and the produced hydrogen is used as fuel for the boiler 30, which allows for more active combustion reactions to 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, explanations of the same parts as those in the power generation systems described above can 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 a mixed fuel. The storage tank 10 can store a 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 a 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 liquid mixed-fuel stored in the storage tank 10. The second line 2000 may be connected to a vaporizer 20. The second line 2000 may transport the liquid mixed-fuel stored in the storage tank 10 to the vaporizer 20.

[0149] The storage tank 10 may be connected to a third line 3000. The third line 3000 may be disposed on top of the storage tank 10. The third line 3000 may transfer the multi-fuel stored in the storage tank 10 in a gaseous state. The third line 3000 may transfer the multi-fuel evaporated in the storage tank 10. The third line 3000 may be connected to the first accumulator via a reformer 50, which will be described later. The third line 3000 may transfer the multi-fuel evaporated in the storage tank 10 from the storage tank 10 to the first accumulator via 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 sequentially.

[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 from the condenser 40 via the sixth line 6000. 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. If the side of the first line 1000 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 of 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. 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 evaporator 20. The first branch line 1100 may pass through the first heater 210. The heat exchange water may pass through the first heater 210 via 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 via 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 combustion fuel in the first heater 210.

[0153] The vaporizer 20 may vaporize the multi-fuel mixture. The vaporizer 20 may vaporize the multi-fuel mixture using 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 multi-fuel mixture stored in the storage tank 10 to the vaporizer 20. The multi-fuel mixture transferred through the second line 2000 may be vaporized in the vaporizer 20. The vaporizer 20 may vaporize the multi-fuel mixture using heat exchange water heated by the condenser 40 as a high-temperature heat source. The multi-fuel mixture 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 co-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-combustion fuel heated by the first heater 210. The high-temperature heat source of the second heater 220 may be an independent heat source. For example, the high-temperature heat source of the second heater 220 may be a heating element that uses electrical energy, or may be hot water or steam, for example.

[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 well-known technology, a 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 multi-fuel vaporized in the storage tank 10 to the reformer 50. The reformer 50 may produce hydrogen using the multi-fuel transferred via the third line 3000. In this case, the multi-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 multi-fuel transferred via the fourth line 4000 to the reformer 50. The reformer 50 may produce hydrogen using the multi-fuel transferred from the fourth branch line 4100. In this case, the multi-fuel may be ammonia.

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

[0160] The fourth line 4000 may transfer the multi-fuel vaporized 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 multi-fuel transferred via the fourth line 4000 to the reformer 50.

[0161] According to the power generation system, 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, thereby reducing the energy used in the vaporizer 20. When seawater is used as the heat exchange water, the seawater absorbs heat in the condenser 40, releases the heat in the vaporizer 20 and the first heater 210, and is then released back into the sea, preventing thermal pollution of the sea. In addition, hydrogen is produced using a mixed fuel, and the produced hydrogen is used as fuel for the boiler 30, allowing for more active combustion reactions to be utilized.

[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, explanations of the same parts as those in the power generation systems described above can 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 vaporizer 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 a mixed fuel. The low-pressure storage tank 100 (or storage tank) can store a 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 a fossil fuel. The mixed fuel may be ammonia, for example.

[0165] The low-pressure storage tank 100 (or storage tank) may be connected to a second line 2000. The second line 2000 may transfer the liquid-state multi-fuel stored in the low-pressure storage tank 100 (or storage tank). The second line 2000 may be connected to the vaporizer 20. The second line 2000 may transfer the liquid-state multi-fuel 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 liquid-state multi-fuel transferred to the first pump 110 to the first heater 210. The second line 2000 may transfer the liquid-state multi-fuel 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 a third line 3000. The third line 3000 may be disposed on top 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 vaporizer 20. The third line 3000 may pass through the first compressor 120. The third line 3000 may transport the multi-fuel to the first compressor 120 and the vaporizer 20. The third line 3000 can transfer the mixed fuel vaporized 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.

[0167] The first pump 110 can pressurize the liquid-state multi-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 multi-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 sequentially.

[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 from the condenser 40 via the sixth line 6000. 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 downstream 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 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 multi-fuel combustion fuel in the vaporizer 20.

[0173] The first branch line 1100 may include a first branch detour line 1200. The first branch detour line 1200 may pass through the first heater 210. When the heat exchange water passes through the first branch detour 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 via the first branch detour line 1200. The multi-combustion fuel transferred via 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 can be transferred to the first branch detour line 1200. Therefore, in this case, the heat exchange water can be used as a high-temperature heat source for the first heater 210. The heat exchange water transferred to the first branch detour line 1200 can be transferred to the first line 1000, and the heat exchange water transferred to the first branch detour line 1200 can 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 multi-fuel transferred through the second line 2000.

[0177] The vaporizer 20 may vaporize the multi-fuel mixture. The vaporizer 20 may vaporize the multi-fuel mixture using 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 multi-fuel mixture stored in the low-pressure storage tank 100 (or a storage tank) to the vaporizer 20. The multi-fuel mixture transferred through the second line 2000 may be vaporized in the vaporizer 20. The vaporizer 20 may vaporize the multi-fuel mixture using heat exchange water heated by the condenser 40 as a high-temperature heat source. The multi-fuel mixture 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-combustion 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 pass 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 multi-fuel 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 multi-fuel transferred via 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 gaseous multi-fuel 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 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 absorbs heat in the condenser 40, releases the heat in the vaporizer 20 or the first heater 210, and is then released back into the sea, which prevents thermal pollution of the sea. The blowdown water generated in the boiler 30 is used as the high-temperature heat source for the second heater 220, which has the effect of reducing the energy used in the second heater 220. In addition, the co-fuel fuel evaporated in the low-pressure storage tank 100 (or storage tank) is used as fuel for the boiler 30, which has the effect of reducing the amount of co-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, explanations of the same parts as those in the power generation systems described above can be omitted, and differences will 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 vaporizer 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 a mixed fuel. The low-pressure storage tank 100 (or storage tank) can store a 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 a fossil fuel. The mixed fuel may be ammonia, for example.

[0187] The low-pressure storage tank 100 (or storage tank) may be connected to a second line 2000. The second line 2000 may transfer the liquid-state multi-fuel stored in the low-pressure storage tank 100 (or storage tank). The second line 2000 may be connected to the vaporizer 20. The second line 2000 may transfer the liquid-state multi-fuel 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 liquid-state multi-fuel transferred to the first pump 110 to the first heater 210. The second line 2000 may transfer the liquid-state multi-fuel 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 multi-fuel pressurized by the first pump 110. The first heater 210 can heat the multi-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 a third line 3000. The third line 3000 may be disposed on top 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 a fourth line 4000. The multi-fuel transported via 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 multi-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 multi-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 sequentially.

[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 if 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 refers to 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 before the condenser 40. Therefore, when the first valve 1310 is opened, the heat exchange water may flow into the condenser 40. The second valve 1320 may be disposed after the condenser 40 and before the evaporator 20. Therefore, when the second valve 1320 is opened, the heat exchange water may flow from the condenser 40 to the evaporator 20. The third valve 1330 may be disposed after the evaporator 20. Therefore, 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, which will be described later, must be closed.

[0197] The first line 1000 may transport the heat exchange water through a second path. Here, the second path refers to 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 before the vaporizer 20. The fourth valve 1340 may also be disposed before 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 after the vaporizer 20, and may be disposed before the condenser 40. Therefore, 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 after 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 can be opened. By opening the fourth valve 1340, the fifth valve 1350, and the sixth valve 1360, the heat exchange water can flow through the second path. The heat exchange water can 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 heat exchange water flowing through the first or second path will be described with reference to Figure 13. Figure 13 is a graph showing the annual seawater temperature distribution in the Samcheok region of South Korea. While the seawater temperature distribution in the Samcheok region is used as an example, it is obvious that the same effect will be obtained in any location where the seawater temperature distribution varies depending on the season, regardless of the region.

[0201] 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. When the temperature of the 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 the seawater serving as heat exchange water is flowed through the first path, the heat can be effectively absorbed in the condenser and released in the evaporator 20.

[0202] On the other hand, when the temperature of the seawater used as heat exchange water is high, the temperature of the seawater is high and the seawater can be used as a heat source for the vaporizer 20 without being heated by the condenser 40. Therefore, when the seawater serving as 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 heat. Therefore, the heat absorption efficiency of the condenser 40 is improved even when the temperature of the seawater is high.

[0203] The effects of operating 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 as a function of pressure, and Figure 13 is a graph showing the annual seawater temperature distribution in the Samcheok region of South Korea. While the saturation temperature of ammonia and the seawater temperature distribution in the Samcheok region are used as examples, it is clear that the same effect can be achieved regardless of region or time of year, as long as the seawater temperature is higher than the saturation temperature of the co-fuel gas. Referring to Figure 13, it can be seen that the annual seawater temperature distribution ranges from a minimum of 2.1°C to a maximum of 28°C. This shows that, regardless of region or date, as long as the seawater temperature is higher than the saturation temperature of the co-fuel stored in the storage tank 10, seawater can be used to heat the co-fuel. In winter, when the temperature of seawater used as heat exchange water in the condenser 40 is low, the low seawater temperature increases the heat absorption efficiency of the condenser 40. Therefore, in this case, seawater can be transported via the first route. When seawater is transported via the first route, it is heated in the condenser 40 and then used as a high-temperature heat source in the vaporizer 20. Since seawater is used to vaporize the multi-fuel mixture in the vaporizer 20, there is an effect of reducing energy consumption. Furthermore, since the seawater heated in the condenser 40 is cooled in the vaporizer 20, there is an effect of preventing thermal pollution of the ocean. In summer, when the temperature of the seawater used as heat exchange water in the condenser 40 is high, the heat absorption efficiency of the condenser 40 decreases due to the high seawater temperature. Therefore, in such cases, seawater can be transported via the second path. When seawater is transported via the second path, it can be used as a low-temperature heat source in the condenser 40 after being cooled in the vaporizer 20. Since seawater is used to vaporize the multi-fuel mixture in the vaporizer 20, there is an effect of reducing energy consumption. Furthermore, 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 flows 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 co-combustion fuel is at 5 bar, the vaporization temperature of ammonia is 4.2°C. The temperature of seawater in vaporizer 20 is sufficient as long as it is high enough to vaporize ammonia. Therefore, if the temperature of seawater is higher than 4.2°C and 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 not to vaporize ammonia, the seawater can flow through the first route.

[0207] The vaporizer 20 can vaporize the mixed-fuel mixture. The vaporizer 20 can vaporize the mixed-fuel mixture using 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 mixture that flows into the vaporizer 20 via the second line 2000. The mixed-fuel mixture vaporized in the vaporizer 20 can flow out of the vaporizer 20 via 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-combustion 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 the removal of 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 pass 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 gaseous multi-fuel 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 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 absorbs heat in the condenser 40, releases the heat in the vaporizer 20 or the first heater 210, and is then released back into the sea, which prevents thermal pollution of the sea. The blowdown water generated in the boiler 30 is used as the high-temperature heat source for the second heater 220, which has the effect of reducing the energy used in the second heater 220. In addition, the co-fuel fuel evaporated in the low-pressure storage tank 100 (or storage tank) is used as fuel for the boiler 30, which has the effect of reducing the amount of co-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, explanations of the same parts as those in the power generation systems described above can 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 vaporizer 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 a mixed fuel. The low-pressure storage tank 100 (or storage tank) can store a 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 a fossil fuel. The mixed fuel may be ammonia, for example.

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

[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 that passes through the turbine and condenses in the condenser 40. Heat may be transferred to the heat exchange water from steam transported from the condenser 40 via a sixth line 6000. 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 a heat medium. The heat released by the heat exchange water in the third heater 230 may be transferred to a heat medium circulating via a ninth line 9000.

[0223] The vaporizer 20 can vaporize the mixed-fuel mixture. The vaporizer 20 can vaporize the mixed-fuel mixture using a heat medium flowing through the ninth line 9000 as a high-temperature heat source. The vaporizer 20 can vaporize the mixed-fuel mixture that flows into the vaporizer 20 via the second line 2000. The mixed-fuel mixture vaporized in the vaporizer 20 can flow out of the vaporizer 20 via 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 transfer medium may circulate through the ninth line 9000. The heat transfer medium circulating through the ninth line 9000 may be heated in the third heater 230. The heat exchange water passing through the third heater 230 may heat the heat transfer medium passing through the third heater 230. The heat transfer medium circulating through the ninth line 9000 may be cooled in the vaporizer 20. The heat transfer medium circulating through the ninth line 9000 may transfer heat to the multi-fuel combustion fuel in the vaporizer 20. The heat transfer medium circulating through the ninth line 9000 may heat the multi-fuel combustion fuel in the vaporizer 20. Here, the heat transfer 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 transport 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 between the heat exchange water and the co-firing fuel is not performed directly but indirectly via a heat medium, corrosion, freezing, or damage to pipes and the like that may occur due to a drop 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-combustion 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 the removal of 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 pass 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 gaseous multi-fuel from the first accumulator to the boiler 30.

[0231] According to the power generation system, heat exchange water heated in the condenser 40 is used as the high-temperature heat source for the vaporizer 20, thereby reducing the energy used in the vaporizer 20. When seawater is used as the heat exchange water, the seawater absorbs heat in the condenser 40, releases the heat in the vaporizer 20 or the first heater 210, and is then released back into the sea, preventing thermal pollution of the sea. Since heat exchange between the heat exchange water and the multi-fuel fuel is not performed directly but indirectly via a heat medium, corrosion, freezing, or damage to pipes and the like that may occur due to a decrease in seawater temperature can be prevented. Furthermore, since indirect heat exchange between seawater and ammonia is performed via a heat medium, seawater contamination can be prevented in the event of damage to the ammonia pipe.

[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 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, explanations of the same parts as those in the power generation systems described above can be omitted, and the 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 vaporizer 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 a mixed fuel. The low-pressure storage tank 100 (or storage tank) can store a 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 a fossil fuel. The mixed fuel may be ammonia, for example.

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

[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 that passes through the turbine and condenses in the condenser 40. Heat may be transferred to the heat exchange water from steam transported from the condenser 40 via a sixth line 6000. 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 a heat medium. The heat released by the heat exchange water in the third heater 230 may be transferred to a heat medium circulating via 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 refers to 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 before the condenser 40. Therefore, when the first valve 1310 is opened, the heat exchange water may flow into the condenser 40. The second valve 1320 may be disposed after the condenser 40 and before the third heater 230. Therefore, when the second valve 1320 is opened, the heat exchange water may flow from the condenser 40 into the third heater 230. The third valve 1330 may be disposed after the third heater 230. Therefore, 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 can flow through the first path. The heat exchange water can 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, which will be described later, must be closed.

[0247] The first line 1000 may transport the heat exchange water through a second path. Here, the second path refers to 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 before the third heater 230. The fourth valve 1340 may also be disposed before 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 after the third heater 230, and may be disposed before the condenser 40. Therefore, 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 after 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 can be opened. By opening the fourth valve 1340, the fifth valve 1350, and the sixth valve 1360, the heat exchange water can flow through the second path. The heat exchange water can 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 heat exchange water flowing through the first or second path will be described with reference to Figure 13. Figure 13 is a graph showing the annual seawater temperature distribution in the Samcheok region of South Korea. While the seawater temperature distribution in the Samcheok region is used as an example, it is obvious that the same effect will be obtained in any location where the seawater temperature distribution varies depending on the season, regardless of the region.

[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. When the temperature of seawater used as heat exchange water is low, the low temperature of the seawater increases the heat absorption efficiency in the condenser 40. Therefore, when seawater as heat exchange water flows through the first path, 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 the seawater used as heat exchange water is high, the temperature of the seawater is high and 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 serving as heat exchange water is caused to flow through the second path, the seawater releases heat in the third heater 230 and then flows 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 mixture. The vaporizer 20 can vaporize the mixed-fuel mixture using a heat medium flowing through the ninth line 9000 as a high-temperature heat source. The vaporizer 20 can vaporize the mixed-fuel mixture that flows into the vaporizer 20 via the second line 2000. The mixed-fuel mixture vaporized in the vaporizer 20 can flow out of the vaporizer 20 via 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 transfer medium may circulate through the ninth line 9000. The heat transfer medium circulating through the ninth line 9000 may be heated in the third heater 230. The heat exchange water passing through the third heater 230 may heat the heat transfer medium passing through the third heater 230. The heat transfer medium circulating through the ninth line 9000 may be cooled in the vaporizer 20. The heat transfer medium circulating through the ninth line 9000 may transfer heat to the multi-fuel combustion fuel in the vaporizer 20. The heat transfer medium circulating through the ninth line 9000 may heat the multi-fuel combustion fuel in the vaporizer 20. Here, the heat transfer 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 transport 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 between the heat exchange water and the co-firing fuel is not performed directly but indirectly via a heat medium, corrosion, freezing, or damage to pipes and the like that may occur due to a drop 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-combustion 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 the removal of 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 pass 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 gaseous multi-fuel from the first accumulator to the boiler 30.

[0261] According to the power generation system, heat exchange water heated in the condenser 40 is used as the high-temperature heat source for the vaporizer 20, thereby reducing the energy used in the vaporizer 20. When seawater is used as the heat exchange water, the seawater absorbs heat in the condenser 40, releases the heat in the vaporizer 20 or the first heater 210, and is then released back into the sea, preventing thermal pollution of the sea. Since heat exchange between the heat exchange water and the multi-fuel fuel is not performed directly but indirectly via a heat medium, corrosion, freezing, or damage to pipes and the like that may occur due to a decrease in seawater temperature can be prevented. Furthermore, since indirect heat exchange between seawater and ammonia is performed via a heat medium, seawater contamination can be prevented in the event of damage to the ammonia pipe.

[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 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, explanations of the same parts as those in the power generation systems described above can be omitted, and the differences will 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 multi-fuel mixture. The storage tank 100 can store the liquefied multi-fuel mixture. The multi-fuel mixture can be combusted in the boiler 30. The multi-fuel mixture can be combusted in the boiler 30 together with the fossil fuel. The multi-fuel mixture can be ammonia, for example.

[0266] The low-pressure storage tank 100 (or storage tank) may be connected to a 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 a first pump 110, a condenser 40, and a 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 in 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 top 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 and the first accumulator. The third line 3000 may transport the multi-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 may transport the multi-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 the 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 steam transported 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 occur within the condenser 40. The steam transferred via the sixth line 6000 may be condensed in the condenser 40 and release heat. The multi-fuel transferred via the second line 2000 may be vaporized by heat transfer in the condenser 40. In this case, the heat transferred to the multi-fuel may be heat released by condensing the steam transferred via the sixth line 6000. Heat may be transferred from the condenser 40 to the heat exchange water transferred via the first line 1000. In this case, heat released by condensing the steam transferred via the sixth line 6000 may be transferred to the heat exchange water. However, if 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 within the condenser 40.

[0271] The first accumulator may be connected to a third line 3000. The multi-fuel mixture vaporized in the low-pressure storage tank 100 (or a 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 mixture 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 mixture from the first accumulator to the boiler 30.

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

[0273] Furthermore, since the mixed fuel evaporated in the low-pressure storage tank 100 (or 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, explanations of the same parts as those in the power generation systems described above can be omitted, and the 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 multi-fuel mixture. The storage tank 100 can store the liquefied multi-fuel mixture. The multi-fuel mixture can be combusted in the boiler 30. The multi-fuel mixture can be combusted in the boiler 30 together with the fossil fuel. The multi-fuel mixture can be ammonia, for example.

[0277] The low-pressure storage tank 100 (or storage tank) may be connected to a 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 a first pump 110, a condenser 40, and a 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 in the condenser 40 to the first accumulator.

[0278] The low-pressure storage tank 100 (or storage tank) may be connected to a third line 3000. The third line 3000 may be disposed on top 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 transfer 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, transfer the mixed fuel compressed in the first compressor 120 to the first heater 210, and transfer 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 the 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 transported from the condenser 40 via a sixth line 6000.

[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 occur within the condenser 40. The steam transferred via the sixth line 6000 may be condensed in the condenser 40 and release heat. The multi-fuel transferred via the second line 2000 may be vaporized by heat transfer in the condenser 40. In this case, the heat transferred to the multi-fuel may be heat released by condensing the steam transferred via the sixth line 6000. Heat may be transferred from the condenser 40 to the heat exchange water transferred via the first line 1000. In this case, heat released by condensing the steam transferred via the sixth line 6000 may be transferred to the heat exchange water. However, if 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 within 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 via 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 an electric heat source.

[0283] The first accumulator may be connected to a third line 3000. The multi-fuel mixture vaporized in the low-pressure storage tank 100 (or a 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 mixture 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 mixture from the first accumulator to the boiler 30.

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

[0285] Furthermore, since the mixed fuel evaporated in the low-pressure storage tank 100 (or 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, explanations of the same parts as those in the power generation systems described above can be omitted, and the 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 a mixed fuel. The low-pressure storage tank 100 (or storage tank) can store a 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 a fossil fuel. The mixed fuel may be ammonia, for example.

[0289] The low-pressure storage tank 100 (or storage tank) may be connected to a 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 a first pump 110, a first heater 210, a condenser 40, and a 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. The second line 2000 may also transfer the mixed-fuel heated by the first heater 210 to the condenser 40, and transfer the mixed-fuel vaporized in 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 top 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 and the first accumulator. The third line 3000 may transport the multi-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 may transport the multi-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 that passes through the turbine and condenses in the condenser 40. Heat may be transferred to the heat exchange water from steam transported from the condenser 40 via a sixth line 6000. 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 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 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 occur within the condenser 40. The steam transferred via the sixth line 6000 may be condensed in the condenser 40 and release heat. The multi-fuel transferred via the second line 2000 may be vaporized by heat transfer in the condenser 40. In this case, the heat transferred to the multi-fuel may be heat released by condensing the steam transferred via the sixth line 6000. Heat may be transferred from the condenser 40 to the heat exchange water transferred via the first line 1000. In this case, heat released by condensing the steam transferred via the sixth line 6000 may be transferred to the heat exchange water. However, if 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 within 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 multi-fuel mixture transported via the second line 2000. The high-temperature heat source of the first heater 210 may be heat exchange water transported 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 mixture vaporized in the low-pressure storage tank 100 (or a 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 mixture 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 mixture from the first accumulator to the boiler 30.

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

[0297] Furthermore, since the mixed fuel evaporated in the low-pressure storage tank 100 (or 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 mixed combustion fuel exchange heat in the first heater, the heat exchange load can be adjusted and designed with the sixth line 6000 of condensed water that has passed through the turbine in the vaporizer.

[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 those skilled in the art that various modifications and variations are possible within the scope of the technical idea of ​​the present invention as set forth in the claims. In addition, some components of the above-described embodiments may be omitted, or the embodiments may be combined with each other.

Claims

1. A fuel supply system that vaporizes a mixed fuel to be supplied to a power generation system, a condenser for condensing steam transferred from a turbine of the power generation system; a storage tank in which the mixed-combustion fuel is liquefied and stored; a vaporizer that vaporizes the mixed-combustion fuel transferred from the storage tank; a first line passing through the condenser and the vaporizer; a fourth line for transporting the mixed-fuel fuel vaporized in the vaporizer; a first heater disposed between the vaporizer and a boiler of the power generation system; Heat exchange water is transferred through the first line, The heat exchange water is heated in the condenser, The vaporizer vaporizes the mixed-fuel combustion fuel with the heat exchange water heated by the condenser, The mixed-combustion fuel vaporized in the vaporizer is supplied to the power generation system; the first line includes a first branch line; the first branch line is disposed on one side of the condenser from which the heat exchange water flows out and transfers at least a portion of the heat exchange water heated in the condenser to the first heater; The first heater heats the mixed-fuel mixture transferred via the fourth line.

2. a second line and a third line connected to the storage tank; The second line transfers the liquid mixed-fuel mixture to the vaporizer; The third line transports the mixed-fuel fuel evaporated in the storage tank, The fuel supply system according to claim 1 , wherein the multi-fuel vaporized in the vaporizer and the multi-fuel transferred via the third line are supplied to the power generation system.

3. 2. The fuel supply system according to claim 1, further comprising a second heater for reheating the mixed-combustion fuel heated by the first heater.

4. the third line passes through a third heater; The fuel supply system according to claim 2 , wherein the multi-combustion fuel transferred through the third line is heated by the third heater.

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

6. The fourth line transfers the mixed-combustion 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 mixture vaporized in the storage tank to the fourth line.

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