Gas turbine system

Abstract

A gas turbine system (100) is provided with: an ammonia supply source (1); a gas turbine (4) connected to the ammonia supply source (1) and including a combustor (42) for combusting ammonia from the ammonia supply source (1); a water electrolysis device (6) that is operated by power generated from the output of the gas turbine (4) and that decomposes water into hydrogen and oxygen; a hydrogen tank (7) that stores hydrogen generated by the water electrolysis device (6) and is in fluid communication with the burner (42); and a control device (90) that controls the supply of hydrogen from the hydrogen tank (7) to the burner (42) and starts the supply of hydrogen to the burner (42) when the gas turbine (4) is started.

Description

Technical Field

[0001] The present disclosure relates to a gas turbine system. This application claims the benefit of priority based on Japanese Patent Application No. 2022-174057 filed on October 31, 2022, the content of which is incorporated herein by reference. Background Art

[0002] Ammonia is known as a fuel that does not emit CO 2 For example, Patent Document 1 discloses a gas turbine system that uses ammonia as a fuel. The system includes an ammonia tank and a first combustion chamber. Ammonia in the tank passes through a first mass flow separator, and a part of it is directly sent to the first combustion chamber, and the rest is sent to the first cracking chamber. In the first cracking chamber, ammonia is decomposed into a hydrogen-rich gas mixture containing nitrogen, hydrogen, and other components. Ammonia and the hydrogen-rich gas mixture are injected into the first combustion chamber and burned. The exhaust gas from the first combustion chamber contains a high level of NOx. In addition, the system includes a second combustion chamber. The exhaust gas from the first combustion chamber is guided to the second combustion chamber. Ammonia in the tank passes through a second mass flow separator, a part of it is directly sent into the second combustion chamber, and the remaining part is sent into the second cracking chamber. In the second cracking chamber, ammonia is decomposed into a hydrogen-rich gas mixture containing nitrogen, hydrogen, and other components. Ammonia and the hydrogen-rich gas mixture are injected into the second combustion chamber and burned. In the second combustion chamber, the fuel burns at a high equivalence ratio of 1.0 to 1.2. Thus, NOx is removed from the exhaust gas from the first combustion chamber.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2018-535355 Summary of the Invention

[0006] Problems to be Solved by the Invention

[0007] Ammonia is a flame-retardant fuel. Therefore, when starting a gas turbine, it is difficult to increase the pressure in the burner from atmospheric pressure to the pressure at rated speed by using only ammonia as a fuel. Therefore, in order to start the gas turbine, it is considered to prepare in advance another easily combustible fuel such as natural gas. However, this results in an increase in fuel costs.

[0008] An object of the present disclosure is to provide a gas turbine system that uses ammonia as a fuel and can facilitate the start of a gas turbine.

[0009] Solutions to the Problems

[0010] A gas turbine system according to one aspect of the present disclosure includes: an ammonia supply source; a gas turbine connected to the ammonia supply source and including a burner that burns ammonia from the ammonia supply source; a water electrolysis device that operates by electricity generated by the output of the gas turbine and decomposes water into hydrogen and oxygen; a hydrogen tank that stores hydrogen generated by the water electrolysis device and is in fluid communication with the burner; and a control device that controls the supply of hydrogen from the hydrogen tank to the burner and starts the supply of hydrogen to the burner when the gas turbine starts up.

[0011] Alternatively, the gas turbine system may include: a cracking device connected to the ammonia supply source and the gas turbine, which decomposes ammonia from the ammonia supply source into hydrogen and nitrogen and transports the gas containing the generated hydrogen to the gas turbine; and an oxygen tank that stores oxygen generated by the water electrolysis device and is in fluid communication with the cracking device, and the control device controls the supply of oxygen from the oxygen tank to the cracking device and starts the supply of oxygen to the cracking device when the gas turbine starts up.

[0012] A gas turbine system according to another aspect of the present disclosure includes: an ammonia supply source; a cracking device connected to the ammonia supply source, which decomposes ammonia into hydrogen and nitrogen; a gas turbine connected to the ammonia supply source and the cracking device and including a burner that burns ammonia from the ammonia supply source and the hydrogen-containing gas from the cracking device; a water electrolysis device that operates by electricity generated by the output of the gas turbine and decomposes water into hydrogen and oxygen; an oxygen tank that stores oxygen generated by the water electrolysis device and is in fluid communication with the cracking device; and a control device that controls the supply of oxygen from the oxygen tank to the cracking device and starts the supply of oxygen to the cracking device when the gas turbine starts up.

[0013] Alternatively, the gas turbine system may include a hydrogen tank that stores hydrogen generated by the water electrolysis device and is in fluid communication with the burner, and the control device controls the supply of hydrogen from the hydrogen tank to the burner and starts the supply of hydrogen to the burner when the gas turbine starts up.

[0014] Advantageous Effects of the Invention

[0015] According to the present disclosure, in a gas turbine system using ammonia as fuel, the startup of the gas turbine can be promoted. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram showing the gas turbine system of the first embodiment.

[0017] Figure 2 is a schematic diagram showing the gas turbine system of the second embodiment.

[0018] Figure 3 is a schematic diagram showing the gas turbine system of the third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. The specific dimensions, materials, numerical values, etc. shown in these embodiments are merely illustrative examples for easy understanding, and do not limit the present disclosure except in the case of special instructions. In addition, in this specification and the drawings, elements having substantially the same functions and structures are denoted by the same reference numerals, and redundant descriptions are omitted. Further, elements not directly related to the present disclosure are not shown.

[0020] Figure 1 is a schematic diagram showing a gas turbine system 100 according to a first embodiment. In the present disclosure, the gas turbine system 100 may also be simply referred to as "system 100". For example, the system 100 includes an ammonia tank (ammonia supply source) 1, a pressurizer 2, a cracking device 3, a gas turbine 4, a generator 5, a water electrolysis device 6, a hydrogen tank 7, an oxygen tank 8, and a control device 90. The system 100 may further include other components. In addition, the system 100 may not include one or more of the above components.

[0021] The ammonia tank 1 stores ammonia. Specifically, the ammonia tank 1 stores liquid ammonia. The ammonia tank 1 is connected to the pressurizer 2 through a pipe P1. The liquid ammonia stored in the ammonia tank 1 is supplied to the pressurizer 2 through the pipe P1. In another embodiment, for example, an ammonia production facility may be used as the ammonia supply source instead of the ammonia tank 1.

[0022] The pressurizer 2 pressurizes the ammonia from the ammonia tank 1. The pressurizer 2 is communicably connected to the control device 90 by wire or wirelessly and is controlled by the control device 90. A pipe P2 is connected to the pressurizer 2. The pressurized ammonia flows from the pressurizer 2 into the pipe P2.

[0023] In the present embodiment, ammonia is supplied to the cracking device 3 and the gas turbine 4 in a liquid state. In this case, for example, the pressurizer 2 may be a pump. In other embodiments, for example, the system 100 may include a vaporizer in at least one of the pipes P1, P2, and P21, and ammonia may be supplied to the cracking device 3 and the gas turbine 4 in a gaseous state. When the pressurizer 2 pressurizes gaseous ammonia, for example, the pressurizer 2 may be a compressor.

[0024] A valve V1 is provided in the pipe P2. The valve V1 is connected to the control device 90 in a manner capable of communicating by wire or wirelessly and is controlled by the control device 90. For example, the control device 90 controls the opening degree of the valve V1 based on the power demand and the power generation amount in the generator 5, thereby adjusting the flow rate of ammonia flowing in the pipe P2. The pipe P2 branches into a pipe P21 and a pipe P22. The pipe P21 is connected to the cracking device 3, and the pipe P22 is connected to the gas turbine 4.

[0025] At least a part of the pressurized ammonia is supplied to the gas turbine 4 via the pipe P22.

[0026] The remaining part of the pressurized ammonia is supplied to the cracking device 3 via the pipe P21. A valve V2 is provided in the pipe P21. The valve V2 is connected to the control device 90 in a manner capable of communicating by wire or wirelessly, and is controlled by the control device 90. The control device 90 adjusts the flow rate of ammonia supplied to the cracking device 3 by controlling the opening degree of the valve V2.

[0027] The cracking device 3 decomposes ammonia into hydrogen and nitrogen. The cracking device 3 includes a catalyst for decomposing ammonia into hydrogen and nitrogen. Such a catalyst contains, for example, at least one of Ru, Rh, Pt, and Pd. The cracking device 3 is connected to the gas turbine 4 via the pipe P23. The gas containing hydrogen and nitrogen (in the present disclosure, it may also be referred to as "hydrogen-rich gas") is supplied from the cracking device 3 to the gas turbine 4 via the pipe P23.

[0028] The gas turbine 4 includes a compressor 41, a burner 42, and a turbine 43. The gas turbine 4 may also have other components. The compressor 41 pressurizes air and delivers the pressurized air to the burner 42.

[0029] The burner 42 receives the pressurized air from the compressor 41. In addition, the burner 42 is fluidly connected to the ammonia tank 1 via the above-mentioned pipes P1, P2, and P22. The burner 42 receives ammonia from the ammonia tank 1. Further, the burner 42 is fluidly connected to the cracking device 3 via the above-mentioned pipe P23. The burner 42 receives the hydrogen-rich gas from the cracking device 3. In the present embodiment, the burner 42 burns ammonia and the hydrogen-rich gas. The burner 42 may also burn other fuels according to the situation.

[0030] The exhaust gas generated by combustion is supplied from the burner 42 to the turbine 43. The turbine 43 rotates by the exhaust gas. The exhaust gas is supplied to other devices (not shown) located downstream of the turbine 43, such as a waste heat recovery boiler and a denitration device. In the present embodiment, the rotational force of the turbine 43 is used for the operation of the generator 5. In other embodiments, the rotational force of the turbine 43 may also be used in other devices. The electric power generated by the generator 5 is supplied to other devices (not shown) within the system 100 or externally. In addition, a part of the electric power generated by the generator 5 is supplied to the water electrolysis device 6.

[0031] Generally, the combustion rate of ammonia is slow. Therefore, when only ammonia is burned in the burner 42, the combustion easily becomes unstable. However, in the present embodiment, a part of the ammonia from the ammonia tank 1 is decomposed into hydrogen and nitrogen in the cracking device 3 and then supplied to the burner 42. Since the combustion rate of hydrogen is fast, the combustion in the burner 42 is stable, and the amount of ammonia that can be burned also increases. As a result, the ammonia remaining in the exhaust gas from the burner 42 due to various factors (for example, unreacted ammonia in the cracking device 3 and unburned ammonia in the burner 42) is reduced. As a result, for example, the operating cost of the denitration device is reduced.

[0032] In addition, as described above, in the present embodiment, a part of the ammonia from the ammonia tank 1 is decomposed into hydrogen and nitrogen in the cracking device 3 and then supplied to the burner 42. In this case, the nitrogen atoms N combine into nitrogen molecules N in an environment where there is no oxygen atom O or little oxygen atom O in the section from the cracking device 3 to the burner 42. 2 . Nitrogen molecule N 2 is stable and is less likely to bond with oxygen atoms O compared to nitrogen atoms N. Therefore, the generation of NOx, especially fuel NOx, is suppressed.

[0033] The water electrolysis device 6 decomposes water into hydrogen and oxygen by electrolysis. The water electrolysis device 6 includes an electrolytic cell including a cathode and an anode. The water electrolysis device 6 receives water (for example, alkaline pure water) from the pipe P3. The water can be supplied from various supply sources not shown, such as the water supply line of the steam turbine. The water electrolysis device 6 receives electricity from the generator 5 and applies a voltage between the cathode and the anode placed in the water. Hydrogen is generated from the cathode and oxygen is generated from the anode.

[0034] The water electrolysis device 6 is connected to the hydrogen tank 7 through the pipe P4. In addition, the water electrolysis device 6 is connected to the oxygen tank 8 through the pipe P5. Hydrogen is transported to the hydrogen tank 7 through the pipe P4, and oxygen is transported to the oxygen tank 8 through the pipe P5.

[0035] The hydrogen tank 7 stores the hydrogen generated by the water electrolysis device 6. The hydrogen tank 7 is in fluid communication with the burner 42. Specifically, in the present embodiment, the hydrogen tank 7 is connected to the pipe P22 through the pipe P6 and is connected to the burner 42 through the pipes P6 and P22.

[0036] The hydrogen tank 7 supplies hydrogen to the burner 42. Specifically, for example, a valve V3 is provided in the pipe P6. The valve V3 is connected to the control device 90 in a manner capable of communicating by wire or wirelessly and is controlled by the control device 90. The control device 90 adjusts the flow rate of hydrogen supplied from the hydrogen tank 7 to the burner 42 by controlling the opening degree of the valve V3.

[0037] The oxygen tank 8 stores the oxygen generated by the water electrolysis device 6. The oxygen tank 8 is in fluid communication with the cracking device 3. Specifically, in the present embodiment, the oxygen tank 8 is connected to the cracking device 3 through the pipe P7.

[0038] The oxygen tank 8 supplies oxygen to the cracking device 3. Specifically, for example, a valve V4 is provided in the pipe P7. The valve V4 is connected to the control device 90 in a manner capable of communicating by wire or wirelessly, and is controlled by the control device 90. The control device 90 adjusts the flow rate of the oxygen supplied to the cracking device 3 by controlling the opening degree of the valve V4.

[0039] The control device 90 controls the whole or a part of the system 100. For example, the control device 90 may be composed of one or more PCs. The control device 90 includes constituent elements such as a processor 90a, a storage device 90b, and a connector 90c, and these constituent elements are connected to each other via a bus. For example, the processor 90a includes a CPU (Central Processing Unit). For example, the storage device 90b includes a hard disk, a ROM for storing programs, and a RAM as a work area. The control device 90 is communicably connected to each constituent element of the system 100 via the connector 90c by wire or wirelessly. For example, the control device 90 may further include other constituent elements such as a display device such as a liquid crystal display or a touch panel, and an input device such as a keyboard, a button, or a touch panel. For example, the following operations of the control device 90 can also be realized by causing the processor 90a to execute a program stored in the storage device 90b.

[0040] Next, the operation of the system 100 will be described.

[0041] The water electrolysis device 6 decomposes water into hydrogen and oxygen by the electric power generated by the generator 5 during the operation of the gas turbine 4, that is, the electric power generated by the output of the gas turbine 4. The hydrogen is stored in the hydrogen tank 7, and the oxygen is stored in the oxygen tank 8. For example, the water electrolysis device 6 may also stop operating when both or at least one of the hydrogen tank 7 and the oxygen tank 8 are filled with gas.

[0042] After the gas turbine 4 stops operating, when the control device 90 receives an instruction to restart the gas turbine 4, the processor 90a controls the pressurizer 2 in such a manner that the valves V1 and V2 are opened and the pressurizer 2 is started to supply ammonia from the ammonia tank 1 to the burner 42 and the cracking device 3.

[0043] In addition, the processor 90a opens the valve V3 and supplies hydrogen from the hydrogen tank 7 to the pipe P22. In the pipe P22, ammonia from the ammonia tank 1 is mixed with hydrogen from the hydrogen tank 7. Therefore, a mixed gas of ammonia and hydrogen is supplied to the burner 42. After the gas turbine 4 stops operating, the pressure in the burner 42 and the pipe P22 decreases to atmospheric pressure. Therefore, for example, hydrogen can also be automatically supplied from the hydrogen tank 7 to the pipe P22 due to the differential pressure between the pressure in the hydrogen tank 7 and the pressure in the pipe P22.

[0044] As described above, the burner 42 receives the mixed gas of ammonia and hydrogen from the pipe P22. Therefore, when starting the gas turbine 4, in the burner 42, the mixed gas of ammonia and hydrogen burns. Hydrogen burns more easily than ammonia. Therefore, compared with the case of using only ammonia as fuel, the combustion in the burner 42 is accelerated.

[0045] In addition, the processor 90a opens the valve V4 and supplies oxygen from the oxygen tank 8 to the cracking device 3. For example, when the gas turbine 4 stops operating, the cracking device 3 also stops operating. In addition, at the time of these stops, the valve V4 is closed, so oxygen does not flow. Therefore, after the gas turbine 4 stops operating, the pressure in the cracking device 3 also decreases to atmospheric pressure. Therefore, for example, oxygen can be automatically supplied from the oxygen tank 8 to the cracking device 3 due to the pressure difference between the pressure in the oxygen tank 8 and the pressure in the cracking device 3.

[0046] As described above, the cracking device 3 receives ammonia from the ammonia tank 1 and oxygen from the oxygen tank 8. The cracking of ammonia into nitrogen and hydrogen is an endothermic reaction, so the cracking device 3 requires energy. However, in the present embodiment, the cracking device 3 receives oxygen from the oxygen tank 8. Therefore, when starting the gas turbine 4, both ammonia and oxygen are present in the cracking device 3. The catalyst of the cracking device 3 is oxidized by the oxygen from the oxygen tank 8 and generates heat. Therefore, the cracking device 3 does not receive energy from the outside and can obtain the energy required for cracking through the self-heating of the catalyst. The generated hydrogen-rich gas containing nitrogen and hydrogen is supplied from the cracking device 3 to the burner 42. Therefore, the burner 42 also receives hydrogen from the cracking device 3. Therefore, the combustion in the burner 42 is further accelerated.

[0047] As the amount of hydrogen in the hydrogen tank 7 decreases, the pressure in the hydrogen tank 7 decreases. In addition, as the start-up (sequence) of the gas turbine 4 proceeds, the pressure in the burner 42 and the pipe P22 increases. Therefore, the differential pressure between the pressure in the hydrogen tank 7 and the pressure in the pipe P22 decreases. Therefore, for example, the supply of hydrogen can also be automatically stopped when the differential pressure decreases sufficiently. As an alternative or addition, for example, when the gas turbine 4 reaches the rated speed, the processor 90a can also close the valve V3 and stop the supply of hydrogen from the hydrogen tank 7 to the pipe P22.

[0048] Similarly, as the amount of oxygen in the oxygen tank 8 decreases, the pressure inside the oxygen tank 8 decreases. Additionally, as the cracking progresses, the pressure inside the cracking device 3 increases. Therefore, the differential pressure between the pressure inside the oxygen tank 8 and the pressure inside the cracking device 3 decreases. Thus, for example, the supply of oxygen can also be automatically stopped when the differential pressure decreases sufficiently. As an alternative or addition, for example, when the gas turbine 4 reaches its rated speed, the processor 90a can also close the valve V4 to stop the supply of oxygen from the oxygen tank 8 to the cracking device 3.

[0049] The system 100 as described above includes: an ammonia tank 1; a gas turbine 4 connected to the ammonia tank 1 and including a burner 42 that burns ammonia from the ammonia tank 1; a water electrolysis device 6 that operates by the electric power generated by the output of the gas turbine 4 and decomposes water into hydrogen and oxygen; a hydrogen tank 7 that stores the hydrogen generated by the water electrolysis device 6 and is in fluid communication with the burner 42; and a control device 90 that controls the supply of hydrogen from the hydrogen tank 7 to the burner 42 and starts the supply of hydrogen to the burner 42 when the gas turbine 4 starts. With such a configuration, when starting the gas turbine 4, in the burner 42, a mixed gas of ammonia and hydrogen burns. Hydrogen burns more easily than ammonia. Therefore, compared to the case of using only ammonia as fuel, the combustion in the burner 42 can be accelerated. Thus, the start of the gas turbine 4 can be promoted.

[0050] Furthermore, the system 100 includes: a cracking device 3 connected to the ammonia tank 1 and the gas turbine 4, which decomposes ammonia from the ammonia tank 1 into hydrogen and nitrogen and transports the generated hydrogen-rich gas to the gas turbine 4; and an oxygen tank 8 that stores the oxygen generated by the water electrolysis device 6 and is in fluid communication with the cracking device 3. The control device 90 controls the supply of oxygen from the oxygen tank 8 to the cracking device 3 and starts the supply of oxygen to the cracking device 3 when the gas turbine 4 starts. With such a configuration, when starting the gas turbine 4, both ammonia and oxygen are present inside the cracking device 3. The catalyst of the cracking device 3 is oxidized by the oxygen from the oxygen tank 8 and generates heat. Therefore, the cracking device 3 does not receive energy from the outside and can obtain the energy required for cracking through the self-heating of the catalyst. The generated hydrogen-rich gas is supplied from the cracking device 3 to the burner 42. Therefore, the burner 42 also receives hydrogen from the cracking device 3. Thus, the start of the gas turbine 4 can be further promoted.

[0051] In another aspect, the system 100 includes: an ammonia tank 1; a cracking device 3 connected to the ammonia tank 1 that decomposes ammonia into hydrogen and nitrogen; a gas turbine 4 connected to the ammonia tank 1 and the cracking device 3 and including a burner 42 that burns ammonia from the ammonia tank 1 and a hydrogen-containing gas from the cracking device 3; a water electrolysis device 6 that operates by electricity generated from the output of the gas turbine 4 and decomposes water into hydrogen and oxygen; an oxygen tank 8 that stores oxygen generated by the water electrolysis device 6 and is in fluid communication with the cracking device 3; and a control device 90 that controls the supply of oxygen from the oxygen tank 8 to the cracking device 3 and starts the supply of oxygen to the cracking device 3 when the gas turbine 4 is started. According to such a structure, when starting the gas turbine 4, both ammonia and oxygen are present in the cracking device 3. The catalyst of the cracking device 3 is oxidized by the oxygen from the oxygen tank 8 and generates heat. Therefore, the cracking device 3 does not receive energy from the outside and can obtain the energy required for cracking through the self-heating of the catalyst. The generated hydrogen-rich gas is supplied from the cracking device 3 to the burner 42. Therefore, when starting the gas turbine 4, in the burner 42, the mixed gas of ammonia and hydrogen burns. Hydrogen burns more easily than ammonia. Therefore, compared with the case of using only ammonia as fuel, the combustion in the burner 42 can be accelerated. Therefore, the start of the gas turbine 4 can be promoted.

[0052] In addition, the system 100 includes a hydrogen tank 7 that stores hydrogen generated by the water electrolysis device 6 and is in fluid communication with the burner 42. The control device 90 controls the supply of hydrogen from the hydrogen tank 7 to the burner 42 and starts the supply of hydrogen to the burner 42 when the gas turbine 4 is started. According to such a structure, when starting the gas turbine 4, the burner 42 also receives hydrogen from the hydrogen tank 7. Therefore, the start of the gas turbine 4 can be further promoted.

[0053] Next, a gas turbine system according to another embodiment will be described.

[0054] Figure 2 It is a schematic diagram showing a gas turbine system 200 according to the second embodiment. The difference between the system 200 and the system 100 of the first embodiment is that in the oxygen tank 8, oxygen is mixed with the surrounding air and stored. Regarding other structures, the system 200 may be the same as the system 100.

[0055] Specifically, a pipe P8 for taking in the surrounding air into the oxygen tank 8 is provided in the oxygen tank 8. A valve V5 and a compressor 9 are provided in the pipe P8. The valve V5 and the compressor 9 are communicably connected to the control device 90 in a wired or wireless manner and are controlled by the control device 90.

[0056] In addition, a sensor Se is provided in the oxygen tank 8. The sensor Se detects the oxygen concentration of the gas in the oxygen tank 8. The sensor Se can be, for example, an oxygen concentration meter. The sensor Se is connected to the control device 90 in a manner capable of communicating via wire or wirelessly, and transmits the detection data to the control device 90.

[0057] For example, the control device 90 controls the opening degree of the valve V5 and the output of the compressor 9, and adjusts the amount of air taken into the oxygen tank 8 so that the oxygen concentration detected by the sensor Se is within a predetermined range. For example, the lower limit value of the predetermined range can be determined in such a way that the gas in the oxygen tank 8 sufficiently promotes the heat generation in the cracking device 3, and is higher than the oxygen concentration in the general environment, which is 21%. In addition, oxygen is a gas with strong combustion-supporting properties. Therefore, for example, the upper limit value of the predetermined range can be determined in such a way as to prevent ignition in the oxygen tank 8. For example, the predetermined range can also be stored in the storage device 90b.

[0058] The system 200 of such a second embodiment has the same effect as the system 100. In addition, the system 200 includes a sensor Se for detecting the oxygen concentration of the gas in the oxygen tank 8, a compressor 9 for taking in the surrounding air into the oxygen tank 8, and a valve V5. According to such a structure, the oxygen concentration of the gas in the oxygen tank 8 can be maintained within a range that sufficiently promotes the heat generation in the cracking device 3 and can prevent ignition in the oxygen tank 8.

[0059] Next, a gas turbine system of still another embodiment will be described.

[0060] Figure 3 FIG. is a schematic diagram showing a gas turbine system 300 of a third embodiment. The difference between the system 300 and the system 100 of the first embodiment is that the pipe P6 from the hydrogen tank 7 is directly connected to the burner 42. Regarding other structures, the system 300 can be the same as the system 100.

[0061] For example, the pipe P6 can also supply hydrogen to the vicinity of an igniter (not shown) in the burner 42. According to such a structure, when starting the gas turbine 4, a flame can be quickly formed in the burner 42. The system 300 of such a third embodiment has the same effect as the system 100.

[0062] As described above, the embodiments have been described with reference to the drawings, but the present disclosure is not limited to the above embodiments. It is obvious that those skilled in the art can conceive of various modification examples or correction examples within the scope described in the claims, and of course, they are also understood to belong to the technical scope of the present disclosure.

[0063] For example, in the above-described embodiments, the systems 100, 200, and 300 include both the hydrogen tank 7 and the oxygen tank 8, and both hydrogen and oxygen generated by the water electrolysis device 6 are used to start the gas turbine 4. In other embodiments, the system may use only one of hydrogen and oxygen generated by the water electrolysis device 6 to start the gas turbine 4. For example, in other embodiments, the system may not include the oxygen tank 8 and may not use the oxygen generated by the water electrolysis device 6 to start the gas turbine 4. In this case, the system may or may not include the cracking device 3. In yet another embodiment, for example, the system may not include the hydrogen tank 7 and may not use the hydrogen generated by the water electrolysis device 6 to start the gas turbine 4.

[0064] In addition, in the system 300 of the third embodiment, the pipe P6 from the hydrogen tank 7 is directly connected to the burner 42. In other embodiments, for example, the pipe P6 may be connected to the pipe P23 that connects the cracking device 3 and the burner 42.

[0065] The present disclosure can promote the use of ammonia related to the reduction of CO 2 emissions. Therefore, for example, it can contribute to Goal 7 of the Sustainable Development Goals (SDGs), "Ensure access to affordable, reliable, sustainable and modern energy".

[0066] Reference Signs

[0067] 1 - ammonia tank (ammonia supply source); 3 - cracking device; 4 - gas turbine; 6 - water electrolysis device; 7 - hydrogen tank; 8 - oxygen tank; 42 - burner; 90 - control device; 100 - gas turbine system; 200 - gas turbine system; 300 - gas turbine system.

Claims

1. A gas turbine system, characterized in that, it comprises: an ammonia supply source; a gas turbine connected to the ammonia supply source and including a burner for burning ammonia from the ammonia supply source; a water electrolysis device that operates by electricity generated from the output of the gas turbine and decomposes water into hydrogen and oxygen; a hydrogen tank that stores hydrogen generated by the water electrolysis device and is in fluid communication with the burner; and a control device that controls the supply of hydrogen from the hydrogen tank to the burner and starts the supply of hydrogen to the burner when the gas turbine starts.

2. The gas turbine system according to claim 1, characterized in that, it comprises: a cracking device connected to the ammonia supply source and the gas turbine, which decomposes ammonia from the ammonia supply source into hydrogen and nitrogen and transports the gas containing the generated hydrogen to the gas turbine; and an oxygen tank that stores oxygen generated by the water electrolysis device and is in fluid communication with the cracking device, the control device controls the supply of oxygen from the oxygen tank to the cracking device and starts the supply of oxygen to the cracking device when the gas turbine starts.

3. A gas turbine system, characterized in that, it comprises: an ammonia supply source; a cracking device connected to the ammonia supply source and decomposing ammonia into hydrogen and nitrogen; a gas turbine connected to the ammonia supply source and the cracking device and including a burner for burning ammonia from the ammonia supply source and the hydrogen-containing gas from the cracking device; a water electrolysis device that operates by electricity generated from the output of the gas turbine and decomposes water into hydrogen and oxygen; an oxygen tank that stores oxygen generated by the water electrolysis device and is in fluid communication with the cracking device; and a control device that controls the supply of oxygen from the oxygen tank to the cracking device and starts the supply of oxygen to the cracking device when the gas turbine starts.

4. The gas turbine system according to claim 3, characterized in that, it comprises a hydrogen tank that stores hydrogen generated by the water electrolysis device and is in fluid communication with the burner, the control device controls the supply of hydrogen from the hydrogen tank to the burner and starts the supply of hydrogen to the burner when the gas turbine starts.

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