Power system

Abstract

The invention discloses a power system which comprises an air compressor, an air compressor, an air inlet and an air outlet. The first gas turbine is used for driving the gas compressor to work; the gas storage tank is used for storing hydrogen gas; an outlet of the gas storage tank is communicated with an inlet of the first gas turbine; the heat exchange assembly is arranged on a passage through which the gas storage tank communicates with the first gas turbine; an inlet of the combustion chamber communicates with an outlet of the first gas turbine and an outlet of the gas compressor; a second gas turbine for outputting a driving force; an inlet of the second gas turbine communicates with an outlet of the combustion chamber.

Description

Technical Field

[0001] The present invention relates to the field of power technology, and in particular to a power system. Background Art

[0002] A hydrogen gas turbine is an internal combustion engine that uses flowing hydrogen gas as a working fluid to drive the rotation of an impeller, converting the hydrogen gas's energy into useful work. In related technologies, a hydrogen gas turbine typically consists of a compressor, a gas turbine, and a drive mechanism. The gas turbine simultaneously drives both the compressor and drive mechanisms, making the hydrogen gas turbine inflexible to control. Summary of the Invention

[0003] In view of this, an embodiment of the present application provides a power system.

[0004] To achieve the above object, the present invention adopts the following scheme:

[0005] The present application provides a power system, comprising:

[0006] a compressor, wherein an inlet of the compressor is in communication with the external environment;

[0007] a first gas turbine, configured to drive the compressor;

[0008] A gas storage tank for storing hydrogen gas; the outlet of the gas storage tank is connected to the inlet of the first gas turbine;

[0009] a heat exchange assembly, disposed on a passage connecting the gas storage tank and the first gas turbine;

[0010] a combustion chamber, wherein an inlet of the combustion chamber is connected to an outlet of the first gas turbine and an outlet of the compressor respectively;

[0011] The second gas turbine is used to output driving force; the inlet of the second gas turbine is connected to the outlet of the combustion chamber.

[0012] In some optional implementations, the heat exchange component is disposed on an exhaust passage of the second gas turbine; and / or,

[0013] The heat exchange component is arranged in the combustion chamber.

[0014] In some optional implementations, the heat exchange component includes:

[0015] The first heat exchanger is provided on the exhaust passage of the second gas turbine.

[0016] In some optional implementations, the first heat exchanger has a first flow channel and a second flow channel disposed adjacent to each other;

[0017] The gas exhausted by the second gas turbine flows through the first flow channel; the outlet of the gas storage tank and the inlet of the first gas turbine are connected through the second flow channel.

[0018] In some optional implementations, the heat exchange component further includes:

[0019] The second heat exchanger is provided in the combustion chamber and is located on a passage connecting the first heat exchanger and the first gas turbine.

[0020] In some optional implementations, the second heat exchanger is attached to the outside of the combustion chamber; or,

[0021] At least a portion of the second heat exchanger is located within the combustion chamber.

[0022] In some optional implementations, the second heat exchanger has a third flow channel and a fourth flow channel that are adjacently arranged;

[0023] The combustion gas burned in the combustion chamber flows through the third flow passage; the first heat exchanger and the inlet of the first gas turbine are connected through the fourth flow passage.

[0024] In some optional implementations, the method further includes: an expansion valve,

[0025] The expansion valve is provided on a passage connecting the outlet of the gas storage tank and the first heat exchanger; or, the expansion valve is provided at the outlet of the gas storage tank.

[0026] In some optional implementations, the gas storage tank is used to store liquid hydrogen gas.

[0027] In some optional implementations, the method further includes:

[0028] A generator is connected to the output shaft of the second gas turbine.

[0029] In the power system of the present application, the first gas turbine is used to drive the compressor, and the second gas turbine is used to output driving force. Here, the compressor and the second gas turbine output driving force are driven by different gas turbines, which can greatly improve the adaptability of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is an optional structural diagram of a power system in a specific embodiment of the present invention;

[0031] Figure 2 This is another optional structural diagram of the power system in a specific embodiment of the present invention.

[0032] Figure numerals: 1. compressor; 2. first gas turbine; 3. combustion chamber; 4. second heat exchanger; 5. second gas turbine; 6. first heat exchanger; 7. generator; 8. gas storage tank; 9. expansion valve; 10. first rotating shaft; 11. second rotating shaft. DETAILED DESCRIPTION

[0033] The technical solution of the present application is further elaborated in detail below with reference to the accompanying drawings and specific embodiments.

[0034] In the description of the embodiments of this application, it should be noted that, unless otherwise specified and limited, the term "connection" should be understood in a broad sense. For example, it can be an electrical connection, or it can be the internal connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meaning of the above terms can be understood according to the specific circumstances.

[0035] It should be noted that the terms "first, second, and third" in the embodiments of the present application are merely used to distinguish similar objects and do not represent a specific ordering of the objects. It is understood that the terms "first, second, and third" can be interchanged to represent a specific order or precedence where permitted. It should be understood that the objects distinguished by "first, second, and third" can be interchanged where appropriate, such that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0036] The following combination Figure 1 and Figure 2 The power system described in the embodiments of the present application is described in detail.

[0037] The power system includes: a compressor 1, a first gas turbine 2, a gas storage tank 8, a heat exchange assembly, a combustion chamber 3, and a second gas turbine 5. The inlet of the compressor 1 is connected to the external environment; the first gas turbine 2 is used to drive the compressor 1; the gas storage tank 8 is used to store hydrogen gas; the outlet of the gas storage tank 8 is connected to the inlet of the first gas turbine 2; the heat exchange assembly is arranged in the passage connecting the gas storage tank 8 and the first gas turbine 2; the inlet of the combustion chamber 3 is connected to the outlet of the first gas turbine 2 and the outlet of the compressor 1 respectively; the second gas turbine 5 is used to output driving force; the inlet of the second gas turbine 5 is connected to the outlet of the combustion chamber 3.

[0038] In the prior art, hydrogen gas turbines generally consist of a compressor structure, a gas turbine, and a drive structure. The gas turbine drives both the compressor and drive structures simultaneously. This means that the speeds of the hydrogen gas turbine, the compressor structure, and the drive structure are all the same, making the hydrogen gas turbine inflexible to control. For example, the speed of the compressor structure cannot be adjusted independently. In contrast, in the power system of the present application, the first gas turbine 2 drives the compressor 1, and the second gas turbine 5 outputs driving force. Here, the compressor 1 and the second gas turbine 5 output driving force through different gas turbines, significantly improving the control flexibility of the power system. For example, the speed of the compressor 1 can be adjusted independently by the first gas turbine 2, and the driving force output by the second gas turbine 5 can also be adjusted independently by the second gas turbine 5. Furthermore, the hydrogen gas output from the gas storage tank 8 can provide power for the first gas turbine 2. In other words, the first gas turbine 2 utilizes the energy of the hydrogen gas output from the gas storage tank 8, thereby significantly improving the utilization rate of the hydrogen gas and the energy conversion rate of the power system. In addition, after the hydrogen gas output from the gas storage tank 8 passes through the first gas turbine 2, the operating temperature of the first gas turbine 2 will increase due to the driving force. The higher temperature hydrogen gas can release more energy in the combustion chamber 3, thereby further improving the combustion efficiency of the hydrogen gas in the combustion chamber 3, and thus improving the energy conversion rate of the power system.

[0039] In the embodiment of the present application, the structure of the first gas turbine 2 is not limited. For example, the first gas turbine 2 can be an axial flow gas turbine or a centripetal flow gas turbine.

[0040] Here, the gas output from the gas tank 8 has a relatively high pressure. The high-pressure gas output from the gas tank 8 can drive the first gas turbine 2 to work, and the first gas turbine 2 can drive the compressor 1 to work. The compressor 1 can provide high-pressure air to the combustion chamber 3, thereby greatly reducing the energy consumed by the compressor 1; and thus indirectly improving the energy conversion rate of the power system.

[0041] Here, the hydrogen gas is not burned in the first gas turbine 2 , and the hydrogen gas drives the first gas turbine 2 to work by the pressure.

[0042] In the embodiment of the present application, the structure of the second gas turbine 5 is not limited. For example, the second gas turbine 5 can be an axial flow gas turbine or a centripetal flow gas turbine.

[0043] In the embodiment of the present application, the compressor 1 is used to provide high-pressure air to the combustion chamber 3. The structure of the compressor 1 is not limited. For example, the compressor 1 can be an axial flow air compressor 1 or a centrifugal air compressor 1.

[0044] During operation, the high-pressure hydrogen gas output through the gas storage tank 8 can drive the first gas turbine 2 to work, and the first gas turbine 2 can drive the compressor 1 to work, and the compressor 1 can provide high-pressure air to the combustion chamber 3. The temperature of the high-pressure hydrogen gas flowing through the first gas turbine 2 increases, and it enters the combustion chamber 3 through the outlet of the first gas turbine 2, mixes with the high-pressure air in the combustion chamber 3, and burns to generate high-temperature and high-pressure hydrogen gas, which enters the second gas turbine 5, drives the second gas turbine 5 to work, and outputs driving force.

[0045] It should be noted that the power system may further include a driving engine, which can be used to drive the compressor 1. In the event that the driving force provided by the first gas turbine 2 is insufficient, the driving engine and the first gas turbine 2 can jointly provide power to the compressor 1. Of course, if the driving force provided by the first gas turbine 2 is sufficient to operate the compressor 1, the driving engine may not operate. Here, the driving engine and the compressor 1 can be connected and disconnected via a clutch.

[0046] In the embodiment of the present application, the form of hydrogen gas is not limited. For example, hydrogen gas can be in gaseous state or liquid state. As an example, the gas storage tank 8 is used to store liquid hydrogen gas.

[0047] In an embodiment of the present application, the gas storage tank 8 is used to store hydrogen gas; the outlet of the gas storage tank 8 is connected to the inlet of the first gas turbine 2, so that hydrogen gas of a set pressure is provided to the first gas turbine 2 through the gas storage tank 8, so as to drive the first gas turbine 2 to work through the hydrogen gas of the set pressure.

[0048] In an embodiment of the present application, a heat exchange component is arranged on a passage connecting the gas storage tank 8 and the first gas turbine 2. The heat exchange component is used to heat the hydrogen gas so that the first gas turbine 2 can be driven to work with greater driving force by the high-temperature and high-pressure hydrogen gas, thereby improving the working efficiency of the first gas turbine 2.

[0049] The heat exchange assembly's placement is not limited. For example, the heat exchange assembly can be located in the exhaust passage of the second gas turbine 5. This allows the exhaust gas from the second gas turbine 5 to heat the hydrogen fuel. In other words, by recovering the energy from the exhaust gas to heat the hydrogen fuel, the power system's ability to provide output driving force can be significantly improved. For another example, the heat exchange assembly can be located in the combustion chamber 3, so that the heat from the combustion chamber 3 heats the hydrogen fuel, thereby improving the power system's ability to provide output driving force. Of course, the heat exchange assembly can also be located both in the exhaust passage of the second gas turbine 5 and in the combustion chamber 3.

[0050] The structure of the heat exchange component is not limited. For example, the heat exchange component can be a plate heat exchanger, a shell and tube heat exchanger, or a heat pipe heat exchanger.

[0051] In some optional implementations of the embodiments of the present application, such as Figure 1 As shown, the heat exchange component may include: a first heat exchanger 6, which is arranged on the exhaust passage of the second gas turbine 5, so that the exhaust gas discharged from the exhaust passage of the second gas turbine 5 can be used to heat the hydrogen gas through the first heat exchanger 6, that is, by recovering the energy of the exhaust gas to heat the hydrogen gas, the ability of the power system to provide output driving force can be greatly improved.

[0052] In this implementation, the structure of the first heat exchanger 6 is not limited. For example, the first heat exchanger 6 can be a plate heat exchanger, a shell and tube heat exchanger, or a heat pipe heat exchanger.

[0053] As an example, the first heat exchanger 6 may have a first flow channel and a second flow channel disposed adjacent to each other. The exhaust gas from the second gas turbine 5 flows through the first flow channel, and the outlet of the gas storage tank 8 and the inlet of the first gas turbine 2 are connected via the second flow channel. Here, the working medium in the first flow channel is the high-temperature exhaust gas from the second gas turbine 5, that is, the exhaust gas from the second gas turbine 5. The working medium in the second flow channel is low-temperature hydrogen gas. The low-temperature hydrogen gas and the high-temperature exhaust gas exchange heat through the first heat exchanger 6.

[0054] Here, the first flow channel and the second flow channel are separated from each other and do not affect each other, but can exchange heat.

[0055] Here, the arrangement direction of the first flow channel and the second flow channel is not limited. For example, the first flow channel and the second flow channel can be arranged in parallel.

[0056] In this embodiment, the power system may further include an expansion valve 9. This valve is used to regulate the outflow of the hydrogen gas and also to reduce the pressure of the liquid hydrogen gas to form a gaseous state. By converting the liquid hydrogen gas into a gaseous state, the hydrogen gas can be burned more efficiently in the combustion chamber 3, thereby improving the energy conversion rate of the power system.

[0057] The location of the expansion valve 9 is not limited. For example, the expansion valve 9 can be located in the passage connecting the outlet of the gas storage tank 8 and the heat exchange assembly. Here, the expansion valve 9 can be located in the passage connecting the outlet of the gas storage tank 8 and the first heat exchanger 6. For another example, the expansion valve 9 can also be located at the outlet of the gas storage tank 8.

[0058] In this implementation, the power system may further include: a second heat exchanger 4, which is arranged in the combustion chamber 3 and is located on the passage connecting the first heat exchanger 6 and the first gas turbine 2, so as to further increase the temperature of the hydrogen gas through the combustion chamber 3, thereby increasing the power of the hydrogen gas to drive the first gas turbine 2 to work.

[0059] The location of the second heat exchanger 4 is not limited. For example, the second heat exchanger 4 can be located outside the combustion chamber 3 to absorb heat from the combustion chamber 3. For another example, at least a portion of the second heat exchanger 4 can be located within the combustion chamber 3 to improve the heat absorption capacity of the second heat exchanger 4.

[0060] Here, the structure of the second heat exchanger 4 is not limited. For example, the second heat exchanger 4 can be a plate heat exchanger, a shell and tube heat exchanger, or a heat pipe heat exchanger.

[0061] As an example, the second heat exchanger 4 may have adjacent third and fourth flow channels. The hydrogen gas burned in the combustion chamber 3 flows through the third flow channel. The first heat exchanger 6 and the inlet of the first gas turbine 2 are connected via the fourth flow channel, thereby significantly increasing the temperature of the hydrogen gas and, in turn, improving the ability of the hydrogen gas to drive the first gas turbine 2. Here, the working fluid in the third flow channel is a high-temperature, high-pressure hydrogen gas and air mixture. The working fluid in the fourth flow channel is low-temperature hydrogen gas. The low-temperature hydrogen gas and the high-temperature burning hydrogen gas exchange heat through the second heat exchanger 4.

[0062] In the embodiments of this application, Figure 1 and Figure 2 As shown, the output shaft of the first gas turbine 2 can drive the compressor 1 via the first rotating shaft 10 .

[0063] In some optional implementations of the embodiments of the present application, the power system may further include a generator 7, which is connected to the output shaft of the second gas turbine 5 to drive the generator 7 to generate electricity through the second gas turbine 5; here, the power system is a power generation system.

[0064] In this implementation, the output shaft of the second gas turbine 5 can be connected to the generator 7 via the second rotating shaft 11 .

[0065] Of course, in other implementations, the second gas turbine 5 can also directly drive other structures. For example, the second gas turbine 5 can be used to drive the driving wheels of the traveling equipment to rotate.

[0066] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0067] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A power system, characterized in that: include: a compressor, wherein an inlet of the compressor is in communication with the external environment; a first gas turbine, configured to drive the compressor; Gas storage tank, used to store hydrogen gas; The outlet of the gas storage tank is in communication with the inlet of the first gas turbine; a heat exchange assembly, disposed on a passage connecting the gas storage tank and the first gas turbine; a combustion chamber, wherein an inlet of the combustion chamber is connected to an outlet of the first gas turbine and an outlet of the compressor respectively; The second gas turbine is used to output driving force; the inlet of the second gas turbine is connected to the outlet of the combustion chamber.

2. The power system according to claim 1, characterized in that: The heat exchange component is arranged on the exhaust passage of the second gas turbine; and / or, The heat exchange component is arranged in the combustion chamber.

3. The power system according to claim 1, characterized in that: The heat exchange component comprises: The first heat exchanger is provided on the exhaust passage of the second gas turbine.

4. The power system according to claim 3, characterized in that: The first heat exchanger has a first flow channel and a second flow channel arranged adjacent to each other; The gas exhausted by the second gas turbine flows through the first flow channel; the outlet of the gas storage tank and the inlet of the first gas turbine are connected through the second flow channel.

5. The power system according to claim 3, characterized in that: The heat exchange component further includes: The second heat exchanger is provided in the combustion chamber and is located on a passage connecting the first heat exchanger and the first gas turbine.

6. The power system according to claim 5, characterized in that: The second heat exchanger is attached to the outside of the combustion chamber; or, At least a portion of the second heat exchanger is located within the combustion chamber.

7. The power system according to claim 5, characterized in that: The second heat exchanger has a third flow channel and a fourth flow channel arranged adjacent to each other; The combustion gas burned in the combustion chamber flows through the third flow passage; the first heat exchanger and the inlet of the first gas turbine are connected through the fourth flow passage.

8. The power system according to claim 3, characterized in that: Also includes: Expansion valve, The expansion valve is provided on a passage connecting the outlet of the gas storage tank and the first heat exchanger; or, the expansion valve is provided at the outlet of the gas storage tank.

9. The power system according to claim 1, characterized in that: The gas storage tank is used to store liquid hydrogen gas.

10. The power system according to any one of claims 1 to 9, characterized in that: Also includes: A generator is connected to the output shaft of the second gas turbine.

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