Gas turbine power generation system utilizing liquefied hydrogen

Abstract

A gas turbine power generation system utilizing liquefied hydrogen, according to the present invention, comprises: a heat exchanger which cools the air passing through a high-temperature side by allowing liquefied hydrogen to pass through a low-temperature side; a compressor which compresses the fluid having passed through the heat exchanger; a combustor which combusts the fluid having passed through the compressor; and a turbine which generates power by using the fluid having passed through the combustor.

Description

Gas turbine power generation system using liquefied hydrogen

[0001] The present invention relates to a gas turbine power generation system that utilizes liquefied hydrogen as a refrigerant.

[0002] Air can be used as a working fluid for gas turbine power generation. This air can be readily obtained through various methods, including atmospheric suction. Furthermore, other types of gases, such as hydrogen and LNG (Liquefied Natural Gas), can also be mixed with the working fluid, as needed.

[0003] In this regard, prior Korean Patent Publication No. 10-2019-0044944 discloses an H2 fuel injection system for a gas turbine. Furthermore, the prior document discloses exemplary system operating conditions for reducing environmental pollutants such as nitrogen oxides (NOx) in a gas turbine-based power generation system.

[0004] Meanwhile, the air injected for power generation must maintain consistent conditions, including temperature and humidity, which directly impacts the stability of power generation efficiency. However, due to various external factors, such as season and weather, it becomes difficult to maintain constant temperature and humidity levels in the air collected from the atmosphere.

[0005] As part of solving the above-described problem, the present invention aims to provide a gas turbine power generation system utilizing liquefied hydrogen that allows air to be supplied to a gas turbine generator while maintaining a constant temperature / humidity.

[0006] A gas turbine power generation system utilizing liquefied hydrogen according to the present invention is characterized by including a heat exchanger that cools air passing through a high-temperature side by allowing liquefied hydrogen to pass through a low-temperature side, a compressor that compresses the fluid that has passed through the heat exchanger, a combustor that combusts the fluid that has passed through the compressor, and a turbine that generates power using the fluid that has passed through the combustor.

[0007] In addition, the low-temperature part of the heat exchanger is formed with a multi-folded structure, the liquefied hydrogen flows along the inner side of the low-temperature part, and the high-temperature part of the heat exchanger passes through the outer surface of the low-temperature part.

[0008] In addition, the combustor is characterized in that it combusts the hydrogen and the air that have passed through the heat exchanger together.

[0009] In addition, it is characterized by including an evaporator installed between the low-temperature section of the heat exchanger and the combustor and evaporating the hydrogen.

[0010] In addition, the evaporator is characterized by further evaporating LNG.

[0011] In addition, it is characterized by further including a hydrogen detection sensor that detects whether or not the hydrogen leaks.

[0012] According to the gas turbine power generation system utilizing liquefied hydrogen according to the present invention, air is cooled by liquefied hydrogen at a constant temperature to maintain its liquid state. Through this pre-cooling action, the air supplied to the gas turbine maintains a constant temperature and humidity, thereby maintaining consistent power generation efficiency.

[0013] Additionally, hydrogen used for air cooling can be mixed with air in a turbine, further enhancing resource utilization.

[0014] FIG. 1 is a conceptual diagram of a gas turbine power generation system utilizing liquefied hydrogen according to a first embodiment of the present invention.

[0015] Figure 2 is a conceptual diagram of a gas turbine power generation system utilizing liquefied hydrogen according to a second embodiment of the present invention.

[0016] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0017] In describing the embodiments of the present invention, descriptions of components that would be readily apparent to those skilled in the art will be omitted. Furthermore, the embodiments described in this specification and the concepts depicted in the drawings represent only the most preferred embodiments of the present invention and do not fully represent the technical scope of the present invention. Therefore, it should be understood that various equivalents and modifications may be substituted for them.

[0018] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. In the attached drawings, some components are exaggerated, omitted, or schematically illustrated.

[0019] Below, a gas turbine power generation system utilizing liquefied hydrogen according to an embodiment of the present invention is described.

[0020] FIG. 1 is a conceptual diagram of a gas turbine power generation system utilizing liquefied hydrogen according to a first embodiment of the present invention.

[0021] Referring to FIG. 1, the gas turbine power generation system (1000) utilizing liquefied hydrogen of the present invention includes an air inlet (100), a liquefied hydrogen storage tank (200), a heat exchanger (300), a compressor (400), a combustor (500), an evaporator (600), an LNG storage tank (700), and a turbine (800).

[0022] In addition, a first hydrogen transfer line (10) is installed between the liquid hydrogen storage tank (200) and the heat exchanger (300), a second hydrogen transfer line (20) is installed between the heat exchanger (300) and the evaporator (400), and a third hydrogen transfer line (30) is installed between the combustor (500) and the evaporator (600). A hydrogen detection sensor capable of checking the state of hydrogen is attached to the above transfer lines to prevent hydrogen leakage. In addition, a hydrogen detection sensor is also attached inside the heat exchanger (300).

[0023] The air inlet (100) injects air from the outside into the heat exchanger (300), and the liquid hydrogen storage tank (200) injects stored liquid hydrogen into the heat exchanger (300).

[0024] The heat exchanger (300) includes a high temperature section (310) and a low temperature section (320). Air supplied from an air inlet (100) passes through the high temperature section (310) of the heat exchanger (300). Liquid hydrogen supplied from a liquid hydrogen storage tank (200) passes through the low temperature section (320) of the heat exchanger (300). In addition, the air on the high temperature section (310) side is cooled to a constant temperature by the cold heat of the liquid hydrogen on the low temperature section (320) side.

[0025] Additionally, the low-temperature section (320) can be formed as a multi-folded tubular structure. In this case, the high-temperature section (310) is provided on the outer surface of the low-temperature section (320).

[0026] The compressor (400) compresses the air discharged from the high temperature section (310).

[0027] The evaporator (600) receives hydrogen that has passed through the low-temperature section (320) through the second hydrogen transfer line (20). In addition, the evaporator (600) receives LNG from the LNG storage tank (700). Then, the evaporator (600) evaporates the supplied hydrogen and LNG and transfers them to the combustor (500).

[0028] The combustor (500) receives compressed air from the compressor (400) and hydrogen and LNG evaporated from the evaporator (600). In addition, the combustor (500) combusts air, hydrogen, and LNG and supplies them to the turbine (800). At this time, at least one of the hydrogen and LNG may be selectively combusted together with air, if necessary.

[0029] In the first embodiment, air passes through the air inlet (100) and is supplied to the high temperature section (310) of the heat exchanger. Thereafter, it is compressed through the compressor (400), and then combusted through the combustor (500) to be used as fuel for the turbine (800).

[0030] In addition, in the first embodiment, liquefied hydrogen is injected from a liquefied hydrogen storage tank (200) and supplied to a low-temperature section (320) of a heat exchanger. At this time, the liquefied hydrogen serves to cool the air and is supplied to an evaporator (600). Then, LNG is supplied from an LNG storage tank (700) within the evaporator (600), and the liquefied hydrogen and LNG are evaporated. Thereafter, the liquefied hydrogen and LNG evaporated in the evaporator (600) are combusted through a combustor (500) and used as fuel for a turbine (800).

[0031] Below, a gas turbine power generation system utilizing liquefied hydrogen according to a second embodiment of the present invention is described.

[0032] Figure 2 is a conceptual diagram of a gas turbine power generation system utilizing liquefied hydrogen according to a second embodiment of the present invention.

[0033] Unlike the first embodiment, the second embodiment does not include an LNG storage tank (700).

[0034] Accordingly, unlike the first embodiment, the liquefied hydrogen is evaporated in the evaporator (600) after going through the previous process and is then burned in the combustor (500) without being mixed with other fluids and used as fuel for the turbine (800).

[0035] The gas turbine power generation system utilizing liquefied hydrogen according to the present invention has been described above. Those skilled in the art will readily appreciate that the technical configuration of the present invention can be implemented in other specific forms without altering the technical concept or essential features of the present invention.

[0036] Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. Furthermore, the present invention may be modified and altered by adding, altering, deleting, or adding components, without departing from the spirit of the invention, and such modifications are also included within the scope of the rights.

Claims

1. A heat exchanger that cools air passing through the high-temperature side by passing liquid hydrogen through the low-temperature side; A compressor that compresses the fluid that has passed through the heat exchanger; A combustor that combusts the fluid that has passed through the compressor; and A gas turbine power generation system utilizing liquefied hydrogen, characterized by including a turbine that generates power using the fluid passing through the above combustor.

2. In paragraph 1, The low temperature section of the above heat exchanger is: It is formed with a multi-folded structure, The above liquefied hydrogen is, It flows along the inner side of the above low temperature section, The high temperature section of the above heat exchanger is A gas turbine power generation system utilizing liquefied hydrogen, characterized in that it passes through the outer surface of the above low-temperature section.

3. In paragraph 1, The above combustion chamber, A gas turbine power generation system utilizing liquefied hydrogen, characterized in that the hydrogen and the air that have passed through the heat exchanger are combusted together.

4. In paragraph 3, A gas turbine power generation system utilizing liquefied hydrogen, characterized in that it includes an evaporator installed between the low-temperature section of the heat exchanger and the combustor and evaporating the hydrogen.

5. In paragraph 4, The above evaporator, A gas turbine power generation system utilizing liquefied hydrogen characterized by further evaporation of LNG.

6. In paragraph 1, A gas turbine power generation system utilizing liquefied hydrogen, characterized in that it includes a hydrogen detection sensor that detects whether or not the hydrogen leaks.

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