Hydrogen energy storage power station heat management system based on solid hydrogen storage and working method thereof

Abstract

The invention provides a hydrogen energy storage power station heat management system based on solid hydrogen storage and a working method thereof. A transformation rectifying device and an electrochemical energy storage device are in power supply connection with a power generation device, and a power interface of an electrolytic cell is connected with a direct current power supply interface of the transformation rectifying device; the gas-liquid treater is respectively connected with a hydrogen-alkali mixture, an oxygen-alkali mixture and an alkali liquor interface of the electrolytic bath; the hydrogen purification device is connected with a hydrogen interface of the gas-liquid processor; the solid hydrogen storage device is connected with a hydrogen interface of the hydrogen purification device, low-temperature closed circulating cooling water is circularly connected with the hydrogen charging heat exchanger, and closed circulating hot water is circularly connected with the hydrogen discharging heat exchanger; the fuel cell power generation device is connected with a hydrogen interface of the solid hydrogen storage device; and closed circulating cooling water is circularly connected with the fuel cell heat exchanger. The system provided by the invention can realize heat management in modes of hydrogen production, fuel cell power generation, shutdown hot standby and the like of the hydrogen energy storage power station, and the operation energy efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen energy storage power stations, and in particular to a heat management system for a hydrogen energy storage power station based on solid-state hydrogen storage and a working method thereof. Background Art

[0002] As a large-scale, long-term energy storage medium and important energy carrier, hydrogen energy will play an important role in the future energy supply system. Using renewable energy, especially wind and solar power generation, water electrolysis to produce hydrogen will become one of the main ways to produce hydrogen energy. Solid-state hydrogen storage is a safe storage method at room temperature and pressure. Combined with fuel cell power generation technology, it can promote the consumption of new energy electricity, improve the peak-shaving capacity of the power grid, and maintain the stability of the power system.

[0003] In conventional hydrogen energy storage power stations, the water electrolysis hydrogen production and fuel cell power generation processes will generate a large amount of waste heat, requiring a large amount of circulating cooling water for cooling, and the electricity-hydrogen-electricity energy conversion efficiency is less than 40%; in the intermittent operation mode of the water electrolysis hydrogen production device, an external heat source is required for hot standby to speed up the startup speed of the system switching to the hydrogen production mode; the solid-state hydrogen storage device requires a large amount of low-temperature cooling water and hot water during the process of hydrogen absorption and release, respectively, resulting in a large waste of energy.

[0004] The disadvantage of the existing thermal management system of hydrogen energy storage power stations is that it does not integrate the heating and cooling needs of the system itself for comprehensive thermal management, nor does it introduce solid-state hydrogen storage devices. It only recovers the waste heat generated by water electrolysis hydrogen production devices or hydrogen fuel cell power generation, and the waste heat is mainly used for external supply rather than self-consumption. In the absence of external heat users, a large amount of waste heat will be wasted, and the energy efficiency of the system operation cannot be effectively improved. At present, there is an urgent need for a thermal management system for hydrogen energy storage power stations based on solid-state hydrogen storage and its working method to solve this problem. Summary of the invention

[0005] Based on this, the present invention provides a thermal management system for a hydrogen energy storage power station based on solid-state hydrogen storage and a working method thereof, which realizes thermal management of the hydrogen energy storage power station in three working modes: hydrogen production, fuel cell power generation and shutdown hot standby, so as to efficiently utilize the waste heat generated in the process of water electrolysis hydrogen production and fuel cell power generation, and realize surplus trigeneration of cooling, heating and electricity, thereby improving the energy efficiency and economy of system operation.

[0006] In order to achieve the above-mentioned purpose, in the first aspect, the present invention provides a heat management system for a hydrogen energy storage power station based on solid-state hydrogen storage, comprising a power generation device, a transformer and rectifier device, an electrochemical energy storage device, an electrolyzer, a gas-liquid processor, a hydrogen purification device, a solid-state hydrogen storage device, and a fuel cell power generation device; the power generation device supplies power to the outside; the power interface of the transformer and rectifier device is connected to the power supply line of the power generation device; the power interface of the electrochemical energy storage device is connected to the power supply line of the power generation device, and the discharge interface is connected to the power interface of the transformer and rectifier device; the power interface of the electrolyzer is connected to the DC power supply interface of the transformer and rectifier device; The hydrogen-alkali mixture inlet of the gas-liquid processor is connected to the hydrogen-alkali mixture outlet of the electrolyzer, the oxygen-alkali mixture inlet is connected to the oxygen-alkali mixture outlet of the electrolyzer, and the alkali liquid outlet is connected to the alkali liquid inlet of the electrolyzer; the hydrogen inlet of the hydrogen purification device is connected to the hydrogen outlet of the gas-liquid processor; the hydrogen inlet of the solid-state hydrogen storage device is connected to the hydrogen outlet of the hydrogen purification device, the low-temperature closed-loop cooling water of the solid-state hydrogen storage device is circulated with the hydrogen charging heat exchanger, and the closed-loop hot water is circulated with the hydrogen degassing heat exchanger; the hydrogen inlet of the fuel cell power generation device is connected to the hydrogen outlet of the solid-state hydrogen storage device, the closed-loop cooling water of the fuel cell power generation device is circulated with the fuel cell heat exchanger, and the power supply interface supplies power to the outside.

[0007] Furthermore, the hydrogen charging heat exchanger includes a low-temperature closed-loop cooling water inlet and a low-temperature closed-loop cooling water outlet, the low-temperature closed-loop cooling water inlet is connected to the low-temperature closed-loop cooling water outlet of the solid-state hydrogen storage device, and the low-temperature closed-loop cooling water outlet is connected to the low-temperature closed-loop cooling water inlet of the solid-state hydrogen storage device.

[0008] Furthermore, the hydrogen degassing heat exchanger includes a closed-circulation hot water inlet and a closed-circulation hot water outlet, the closed-circulation hot water inlet is connected to the closed-circulation hot water outlet of the solid-state hydrogen storage device, and the closed-circulation hot water outlet is connected to the closed-circulation hot water inlet of the solid-state hydrogen storage device.

[0009] Furthermore, the fuel cell heat exchanger includes a closed-loop cooling water inlet and a closed-loop cooling water outlet, the closed-loop cooling water inlet is connected to the closed-loop cooling water outlet of the fuel cell power generation device, and the closed-loop cooling water outlet is connected to the closed-loop cooling water inlet of the fuel cell power generation device.

[0010] Furthermore, the heat management system also includes a cooling water device, which includes a circulating cooling water inlet and a circulating cooling water outlet, and the circulating cooling water inlet is connected to the circulating cooling water outlet of the heat recovery and heat storage device.

[0011] Furthermore, the heat management system also includes a heat recovery and heat storage device, which includes a circulating cooling water outlet and a heating interface, the circulating cooling water outlet is connected to the circulating cooling water inlet of the cooling water device, and the heating interface supplies heat to the outside.

[0012] Furthermore, the heat management system also includes a heat pump refrigeration device, which includes a circulating hot water inlet, a circulating hot water outlet and a cold supply interface, the circulating hot water inlet is connected to the circulating hot water outlet of the heat recovery and heat storage device, the circulating hot water outlet is connected to the circulating hot water inlet of the heat recovery and heat storage device, and the cold supply interface supplies cold to the outside.

[0013] In order to achieve the above object, in a second aspect, the present invention provides a working method of a heat management system for a hydrogen energy storage power station based on solid-state hydrogen storage, and the hydrogen production mode of the heat management system includes: The power generation device generates electricity and transmits it to the transformer and rectifier device for hydrogen production. The remaining electricity is first stored in the electrochemical energy storage device, and the remaining electricity is used for external power supply. The transformer and rectifier device transmits direct current to the electrolyzer for hydrogen production. The generated hydrogen-alkali mixture and oxygen-alkali mixture are separated into gas and liquid by a gas-liquid processor to obtain crude hydrogen. The crude hydrogen enters the hydrogen purification device for purification to obtain high-purity hydrogen. The high-purity hydrogen enters the solid-state hydrogen storage device for storage. A large amount of heat is generated during the hydrogen production process. The circulating cooling water is used to cool the alkali solution inside the gas-liquid processor. The circulating cooling water is introduced to cool the alkali solution, and the outlet temperature of the circulating cooling water increases at the same time. The circulating cooling water with increased temperature enters the heat recovery and heat storage device to recover and store the heat. The circulating cooling water after heat recovery enters the cooling water device for cooling. The heat recovery and heat storage device transports hot water to the heat pump refrigeration device to produce low-temperature circulating cooling water and supply it to the outside for cooling, and the remaining heat is used for heating. During the operation of the hydrogen purification device and the hydrogen charging process of the solid hydrogen storage device, low-temperature circulating cooling water is introduced to cool the hydrogen purification device and the solid hydrogen storage device.

[0014] Furthermore, the fuel cell power generation mode of the thermal management system includes: The hydrogen stored in the solid-state hydrogen storage device is released through the hydrogen release process and transported to the fuel cell power generation device for power generation, and the generated electricity is used to supply power to the outside. During the release of hydrogen from the solid-state hydrogen storage device, circulating hot water is introduced to heat the solid-state hydrogen storage device to ensure the stable release of hydrogen; A large amount of heat is generated during the power generation process of the fuel cell power generation device, and circulating cooling water is introduced to cool the fuel cell power generation device, while the temperature of the circulating cooling water increases; The circulating cooling water with increased temperature enters the heat recovery and heat storage device to recover and store the heat. The circulating cooling water after heat recovery enters the cooling water device for cooling. The heat recovery and heat storage device transports hot water to the heat pump refrigeration device to produce low-temperature circulating cooling water and supply it to the outside. At the same time, circulating hot water is introduced into the gas-liquid treatment device to perform hot standby on the electrolyzer to speed up the startup of the system switching to hydrogen production mode, and the remaining heat is supplied to the outside.

[0015] Furthermore, the shutdown hot standby mode of the thermal management system: When the electrolyzer stops running, hot water is circulated in the gas-liquid processor for hot standby to speed up the system's startup when switching to hydrogen production mode. Circulating hot water is provided through heat recovery and heat storage devices to keep the hydrogen production system hot.

[0016] The technical advantages of a hydrogen energy storage power station heat management system based on solid-state hydrogen storage and its working method provided by the present invention are at least reflected in: By setting up solid-state hydrogen storage, heat recovery and heat storage devices and heat pump refrigeration devices, and conducting heat management in the three working modes of hydrogen storage power station, namely hydrogen production, fuel cell power generation and shutdown hot standby, the waste heat generated in the process of water electrolysis to produce hydrogen and fuel cell power generation is recovered and stored, and the heat is used for hydrogen discharge of solid-state hydrogen storage device and hot standby of electrolyzer, and for heat pump refrigeration. The produced low-temperature cooling water is used for hydrogen purification and hydrogen filling of solid-state hydrogen storage device. The surplus heat and cooling capacity can be used for external heating and cooling, so as to efficiently utilize the waste heat generated in the process of water electrolysis to produce hydrogen and fuel cell power generation at the level of hydrogen storage power station itself, and realize the surplus trigeneration of cooling, heating and electricity, thereby improving the energy efficiency and economy of system operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 The present invention provides a block diagram of a heat management system for a hydrogen energy storage power station based on solid-state hydrogen storage.

[0018] Description of the accompanying drawings: 1- power generation device, 2- voltage transformation and rectification device, 3- electrochemical energy storage device, 4- electrolyzer, 5- gas-liquid processor, 6- hydrogen purification device, 7- solid hydrogen storage device, 8- hydrogen charging heat exchanger, 9- hydrogen decompression heat exchanger, 10- fuel cell power generation device, 11- fuel cell heat exchanger, 12- cooling water device, 13- heat pump refrigeration device, 14- heat recovery and heat storage device; 15-the first valve, 16-the second valve, 17-the third valve, 18-the fourth valve, 19-the fifth valve, 20-the sixth valve, 21-the seventh valve, 22-the eighth valve, 23-the ninth valve, 24-the tenth valve, 25-the eleventh valve, 26-the twelfth valve. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] like Figure 1 As shown, a heat management system of a hydrogen energy storage power station based on solid-state hydrogen storage includes a power generation device 1, a transformer and rectifier device 2, an electrochemical energy storage device 3, an electrolyzer 4, a gas-liquid processor 5, a hydrogen purification device 6, a solid-state hydrogen storage device 7, a hydrogen charging heat exchanger 8, a hydrogen decompression heat exchanger 9, a fuel cell power generation device 10, a fuel cell heat exchanger 11, a cooling water device 12, a heat pump refrigeration device 13, and a heat recovery and heat storage device 14. The power supply line of the power generation device 1 is respectively connected to the power supply interface of the transformer and rectifier device 2 and the electrochemical energy storage device 3, and supplies power to the outside.

[0021] The transformer and rectifier device 2 includes a power interface and a DC power supply interface. The power interface is connected to the power supply lines of the power generation device 1 and the electrochemical energy storage device 3 respectively, and the DC power supply interface is connected to the power interface of the electrolyzer 4.

[0022] The electrochemical energy storage device 3 includes a power interface and a discharge interface. The power interface is connected to the power supply line of the power generation device 1, and the discharge interface is connected to the power interface of the transformer and rectifier device 2.

[0023] The electrolytic cell 4 includes a power supply interface, a hydrogen-alkali mixture outlet, an oxygen-alkali mixture outlet, and an alkali liquid inlet, etc. The power supply interface is connected to the DC power supply interface of the transformer and rectifier device 2, the hydrogen-alkali mixture outlet is connected to the hydrogen-alkali mixture inlet of the gas-liquid processor 5, the oxygen-alkali mixture outlet is connected to the oxygen-alkali mixture inlet of the gas-liquid processor 5, and the alkali liquid inlet is connected to the alkali liquid outlet of the gas-liquid processor 5.

[0024] The gas-liquid processor 5 includes a hydrogen-alkali mixture inlet, an oxygen-alkali mixture inlet, an alkali solution outlet, a circulating water inlet, and a circulating water outlet. The hydrogen-alkali mixture inlet is connected to the hydrogen-alkali mixture outlet of the electrolytic cell 4, the oxygen-alkali mixture inlet is connected to the oxygen-alkali mixture outlet of the electrolytic cell 4, the alkali solution outlet is connected to the alkali solution inlet of the electrolytic cell 4, the circulating water inlet is connected to the first valve 15 and the second valve 16, and the circulating water outlet is connected to the third valve 17 and the fourth valve 18.

[0025] The hydrogen purification device 6 includes a hydrogen inlet, a hydrogen outlet, a low-temperature circulating cooling water inlet, and a low-temperature circulating cooling water outlet. The hydrogen inlet is connected to the hydrogen outlet of the gas-liquid processor 5, the hydrogen outlet is connected to the hydrogen inlet of the solid hydrogen storage device 7, the low-temperature circulating cooling water inlet is connected to the fifth valve 19, and the low-temperature circulating cooling water outlet is connected to the sixth valve 20.

[0026] The solid hydrogen storage device 7 includes a hydrogen inlet, a hydrogen outlet, a low-temperature closed-cycle cooling water inlet, a low-temperature closed-cycle cooling water outlet, a closed-cycle hot water inlet, and a closed-cycle hot water outlet. The hydrogen inlet is connected to the hydrogen outlet of the hydrogen purification device 6, the hydrogen outlet is connected to the hydrogen inlet of the fuel cell power generation device 10, the low-temperature closed-cycle cooling water inlet is connected to the low-temperature closed-cycle cooling water outlet of the hydrogen charging heat exchanger 8, the low-temperature closed-cycle cooling water outlet is connected to the low-temperature closed-cycle cooling water inlet of the hydrogen charging heat exchanger 8, the closed-cycle hot water inlet is connected to the closed-cycle hot water outlet of the hydrogen degassing heat exchanger 9, and the closed-cycle hot water outlet is connected to the closed-cycle hot water inlet of the hydrogen degassing heat exchanger 9.

[0027] The hydrogen charging heat exchanger 8 includes a low-temperature circulating cooling water inlet, a low-temperature circulating cooling water outlet, a low-temperature closed-circulation cooling water inlet, and a low-temperature closed-circulation cooling water outlet. The low-temperature circulating cooling water inlet is connected to the seventh valve 21, the low-temperature circulating cooling water outlet is connected to the eighth valve 22, the low-temperature closed-circulation cooling water inlet is connected to the low-temperature closed-circulation cooling water outlet of the solid-state hydrogen storage device 7, and the low-temperature closed-circulation cooling water outlet is connected to the low-temperature closed-circulation cooling water inlet of the solid-state hydrogen storage device 7.

[0028] The dehydrogenation heat exchanger 9 includes a circulating hot water inlet, a circulating hot water outlet, a closed-circulation hot water inlet, and a closed-circulation hot water outlet. The circulating hot water inlet is connected to the ninth valve 23, the circulating hot water outlet is connected to the tenth valve 24, the closed-circulation hot water inlet is connected to the closed-circulation hot water outlet of the solid-state hydrogen storage device 7, and the closed-circulation hot water outlet is connected to the closed-circulation hot water inlet of the solid-state hydrogen storage device 7.

[0029] The fuel cell power generation device 10 includes a hydrogen inlet, a closed-circuit cooling water inlet, a closed-circuit cooling water outlet, and a power supply interface. The hydrogen inlet is connected to the hydrogen outlet of the solid hydrogen storage device 7, the closed-circuit cooling water inlet is connected to the closed-circuit cooling water outlet of the fuel cell heat exchanger 11, the closed-circuit cooling water outlet is connected to the closed-circuit cooling water inlet of the fuel cell heat exchanger 11, and the power supply interface supplies power to the outside.

[0030] The fuel cell heat exchanger 11 includes a circulating cooling water inlet, a circulating cooling water outlet, a closed circulating cooling water inlet, and a closed circulating cooling water outlet. The circulating cooling water inlet is connected to the eleventh valve 25, the circulating cooling water outlet is connected to the twelfth valve 26, the closed circulating cooling water inlet is connected to the closed circulating cooling water outlet of the fuel cell power generation device 10, and the closed circulating cooling water outlet is connected to the closed circulating cooling water inlet of the fuel cell power generation device 10.

[0031] The cooling water device 12 includes a circulating cooling water inlet and a circulating cooling water outlet. The circulating cooling water inlet is connected to the circulating cooling water outlet of the heat recovery and heat storage device, and the circulating cooling water outlet is connected to the second valve 16 and the eleventh valve 25.

[0032] The heat pump refrigeration device 13 includes a low-temperature circulating cooling water inlet, a low-temperature circulating cooling water outlet, a circulating hot water inlet, a circulating hot water outlet, and a cold supply interface. The low-temperature circulating cooling water inlet is connected to the sixth valve 20 and the eighth valve 22, the low-temperature circulating cooling water outlet is connected to the fifth valve 19 and the seventh valve 21, the circulating hot water inlet is connected to the circulating hot water outlet of the heat recovery and heat storage device 14, the circulating hot water outlet is connected to the circulating hot water inlet of the heat recovery and heat storage device 14, and the cold supply interface supplies cold to the outside.

[0033] The heat recovery and heat storage device 14 includes a circulating cooling water inlet, a circulating cooling water outlet, a circulating hot water inlet, a circulating hot water outlet, and a heating interface. The circulating cooling water inlet is connected to the third valve 17 and the twelfth valve 26, the circulating cooling water outlet is connected to the circulating cooling water inlet of the cooling water device 12, the circulating hot water inlet is connected to the circulating hot water outlet of the heat pump refrigeration device 13, the fourth valve 18 and the tenth valve 24, the circulating hot water outlet is connected to the circulating hot water inlet of the heat pump refrigeration device 13, the first valve 15 and the ninth valve 23, and the heating interface supplies heat to the outside.

[0034] In the provided heat management system for a hydrogen energy storage power station based on solid-state hydrogen storage, the present invention provides a working method for the heat management system for a hydrogen energy storage power station based on solid-state hydrogen storage. The basic working principle is: the waste heat generated in the process of water electrolysis to produce hydrogen and fuel cell power generation is recovered and stored, and the heat is used for the solid-state hydrogen storage device to release hydrogen and the electrolyzer to be hot-standby, and for heat pump refrigeration. The produced low-temperature cooling water is used for hydrogen purification and hydrogen filling of the solid-state hydrogen storage device. The remaining heat and cooling capacity can be used for external heating and cooling. Among them, water electrolysis produces hydrogen, and direct current is connected to the electrolyzer to electrolyze water to obtain hydrogen and oxygen. Solid-state hydrogen storage uses metal hydrides, chemical hydrides or nanomaterials as hydrogen storage carriers to achieve hydrogen storage by chemical adsorption and physical adsorption. Hydrogen fuel cells use the catalytic reaction of hydrogen and oxygen to generate water, and directly convert the released energy into electrical energy. Chemical battery.

[0035] In the implementation process, the working method of the heat management system of the hydrogen energy storage power station based on solid-state hydrogen storage of the present invention includes a hydrogen production mode, a fuel cell power generation mode and a shutdown hot standby mode. The working process of each mode is as follows: 1. Hydrogen production mode The power generation device 1 generates electricity and transmits it to the transformer and rectifier device 2 for hydrogen production. The remaining electricity is preferentially stored in the electrochemical energy storage device 3, and the remaining electricity is used to supply electricity to the outside. The transformer and rectifier device 2 transmits direct current to the electrolyzer 4 to start hydrogen production. The generated hydrogen-alkali mixture and oxygen-alkali mixture are separated by gas-liquid treatment device 5 to obtain crude hydrogen. The crude hydrogen enters the hydrogen purification device 6 for purification to obtain high-purity hydrogen. The high-purity hydrogen enters the solid-state hydrogen storage device for storage.

[0036] A large amount of heat is generated during the hydrogen production process, and circulating cooling water is needed to cool the alkali solution inside the gas-liquid processor 5. The second valve 16 and the third valve 17 are opened, and the first valve 15 and the fourth valve 18 are closed. Circulating cooling water is introduced to cool the alkali solution, and the outlet temperature of the circulating cooling water increases. The circulating cooling water with increased temperature enters the heat recovery and heat storage device 14 to recover and store the heat. The circulating cooling water after heat recovery enters the cooling water device 12 for cooling. The heat recovery and heat storage device 14 transports hot water to the heat pump refrigeration device 13, produces low-temperature circulating cooling water and supplies cold to the outside, and the remaining heat is supplied to the outside for heating.

[0037] The operation process of the hydrogen purification device 6 and the hydrogen charging process of the solid hydrogen storage device 7 require low-temperature circulating cooling water. Open the fifth valve 19, the sixth valve 20, the seventh valve 21, and the eighth valve 22 to pass low-temperature circulating cooling water to cool the hydrogen purification device 6 and the solid hydrogen storage device 7.

[0038] In the hydrogen production mode, the ninth valve 23, the tenth valve 24, the eleventh valve 25 and the twelfth valve 26 remain in a closed state.

[0039] 2. Fuel cell power generation mode The hydrogen stored in the solid-state hydrogen storage device 7 is released through a hydrogen release process and transported to the fuel cell power generation device 10 for power generation, and the generated electricity is used to supply power to the outside.

[0040] The solid-state hydrogen storage device 7 needs to absorb heat during the hydrogen release process. The ninth valve 23 and the tenth valve 24 are opened to allow circulating hot water to be introduced to heat the solid-state hydrogen storage device 7 to ensure the stable release of hydrogen.

[0041] The fuel cell power generation device 10 generates a large amount of heat during the power generation process and needs to be cooled. The eleventh valve 25 and the twelfth valve 26 are opened to pass circulating cooling water to cool the fuel cell power generation device 10, and the temperature of the circulating cooling water increases. The circulating cooling water with increased temperature enters the heat recovery and heat storage device 14 to recover and store the heat. The circulating cooling water after heat recovery enters the cooling water device 12 for cooling. The heat recovery and heat storage device 14 transports hot water to the heat pump refrigeration device 13 to produce low-temperature circulating cooling water and supply cold to the outside. At the same time, the electrolyzer 4 is hot-ready by passing circulating hot water into the gas-liquid processor 5, which can speed up the startup speed of the system switching to the hydrogen production mode. The first valve 15 and the fourth valve 18 are opened, and the remaining heat is supplied to the outside.

[0042] In the fuel cell power generation mode, the second valve 16 , the third valve 17 , the fifth valve 19 , the sixth valve 20 , the seventh valve 21 , and the eighth valve 22 remain in a closed state.

[0043] (III) Shutdown hot standby mode When the electrolyzer 4 stops running, hot water is introduced into the gas-liquid processor 5 for hot standby, which can speed up the startup speed of the system switching to the hydrogen production mode.

[0044] The first valve 15 and the fourth valve 18 are opened, and circulating hot water is provided through the heat recovery and heat storage device 14 to keep the hydrogen production system hot.

[0045] In the shutdown hot standby mode, the second valve 16, the third valve 17, the fifth valve 19, the sixth valve 20, the seventh valve 21, the eighth valve 22, the ninth valve 23, the tenth valve 24, the eleventh valve 25, and the twelfth valve 26 remain closed.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A thermal management system for a hydrogen energy storage power station based on solid-state hydrogen storage, characterized in that: include: A power generation device (1) for supplying power to the outside; A transformer and rectifier device (2), wherein the power interface is connected to a power supply line of the power generation device (1); The electrochemical energy storage device (3) has a power supply interface connected to a power supply line of the power generation device (1), and a discharge interface connected to a power supply interface of the transformer and rectifier device (2); The electrolytic cell (4) has a power supply interface connected to a DC power supply interface of the transformer and rectifier device (2); A gas-liquid treatment device (5), wherein the hydrogen-alkali mixture inlet is connected to the hydrogen-alkali mixture outlet of the electrolytic cell (4), the oxygen-alkali mixture inlet is connected to the oxygen-alkali mixture outlet of the electrolytic cell (4), and the alkali solution outlet is connected to the alkali solution inlet of the electrolytic cell (4); A hydrogen purification device (6), wherein the hydrogen inlet is connected to the hydrogen outlet of the gas-liquid processor (5); A solid hydrogen storage device (7), the hydrogen inlet of which is connected to the hydrogen outlet of the hydrogen purification device (6), the low-temperature closed-circulation cooling water of the solid hydrogen storage device (7) is circulated with the hydrogen charging heat exchanger (8), and the closed-circulation hot water is circulated with the hydrogen degassing heat exchanger (9); and A fuel cell power generation device (10) has a hydrogen inlet connected to a hydrogen outlet of a solid hydrogen storage device (7), a closed-loop cooling water circuit of the fuel cell power generation device (10) is connected to a fuel cell heat exchanger (11), and a power supply interface supplies power to the outside.

2. The heat management system of a hydrogen energy storage power station based on solid-state hydrogen storage according to claim 1 is characterized in that: The hydrogen charging heat exchanger (8) comprises a low-temperature closed-circulation cooling water inlet and a low-temperature closed-circulation cooling water outlet, the low-temperature closed-circulation cooling water inlet is connected to the low-temperature closed-circulation cooling water outlet of the solid-state hydrogen storage device (7), and the low-temperature closed-circulation cooling water outlet is connected to the low-temperature closed-circulation cooling water inlet of the solid-state hydrogen storage device (7).

3. The heat management system of a hydrogen energy storage power station based on solid-state hydrogen storage according to claim 1 is characterized in that: The dehydrogenation heat exchanger (9) comprises a closed-circulation hot water inlet and a closed-circulation hot water outlet, the closed-circulation hot water inlet is connected to the closed-circulation hot water outlet of the solid-state hydrogen storage device (7), and the closed-circulation hot water outlet is connected to the closed-circulation hot water inlet of the solid-state hydrogen storage device (7).

4. The heat management system for a hydrogen energy storage power station based on solid-state hydrogen storage according to claim 1 is characterized in that: The fuel cell heat exchanger (11) comprises a closed-circulation cooling water inlet and a closed-circulation cooling water outlet, the closed-circulation cooling water inlet is connected to the closed-circulation cooling water outlet of the fuel cell power generation device (10), and the closed-circulation cooling water outlet is connected to the closed-circulation cooling water inlet of the fuel cell power generation device (10).

5. The thermal management system for a hydrogen energy storage power station based on solid-state hydrogen storage according to any one of claims 1 to 4, characterized in that: The heat management system further comprises a cooling water device (12), the cooling water device (12) comprising a circulating cooling water inlet and a circulating cooling water outlet, the circulating cooling water inlet being connected to the circulating cooling water outlet of the heat recovery and heat storage device.

6. The heat management system for a hydrogen energy storage power station based on solid-state hydrogen storage according to claim 5 is characterized in that: The heat management system further comprises a heat recovery and heat storage device (14), the heat recovery and heat storage device (14) comprising a circulating cooling water outlet and a heat supply interface, the circulating cooling water outlet being connected to a circulating cooling water inlet of the cooling water device (12), and the heat supply interface supplies heat to the outside.

7. The heat management system of a hydrogen energy storage power station based on solid-state hydrogen storage according to claim 6 is characterized in that: The heat management system further comprises a heat pump refrigeration device (13), the heat pump refrigeration device (13) comprising a circulating hot water inlet, a circulating hot water outlet and a cold supply interface, the circulating hot water inlet is connected to the circulating hot water outlet of the heat recovery and heat storage device (14), the circulating hot water outlet is connected to the circulating hot water inlet of the heat recovery and heat storage device (14), and the cold supply interface supplies cold to the outside.

8. A method for operating a heat management system of a hydrogen energy storage power station based on solid-state hydrogen storage, using the heat management system according to any one of claims 1 to 7, characterized in that: Hydrogen production modes include: The power generation device (1) generates electricity and transmits it to the transformer and rectifier device (2) for hydrogen production, and the remaining electricity is preferentially stored in the electrochemical energy storage device (3), and the remaining electricity is used to supply electricity externally; The transformer rectifier device (2) transmits direct current to the electrolyzer (4) to produce hydrogen. The generated hydrogen-alkali mixture and oxygen-alkali mixture are separated into gas and liquid by a gas-liquid processor (5) to obtain crude hydrogen. The crude hydrogen enters a hydrogen purification device (6) to obtain high-purity hydrogen after purification. The high-purity hydrogen enters a solid hydrogen storage device for storage. A large amount of heat is generated during the hydrogen production process, and circulating cooling water is used to cool the alkaline solution inside the gas-liquid treatment device (5). The circulating cooling water is introduced to cool the alkaline solution, thereby increasing the outlet water temperature; The circulating cooling water with increased temperature enters the heat recovery and heat storage device (14) to recover and store heat, and the circulating cooling water after heat recovery enters the cooling water device (12) to be cooled; The heat recovery and heat storage device (14) transports the hot water to the heat pump refrigeration device (13), produces low-temperature circulating cooling water and supplies it to the outside for cooling, and supplies the remaining heat to the outside for heating; During the operation of the hydrogen purification device (6) and the hydrogen charging process of the solid hydrogen storage device (7), low-temperature circulating cooling water is introduced to cool the hydrogen purification device (6) and the solid hydrogen storage device (7).

9. A method for operating a heat management system of a hydrogen energy storage power station based on solid-state hydrogen storage, using the heat management system according to any one of claims 1 to 7, characterized in that: Fuel cell power generation modes include: The hydrogen stored in the solid-state hydrogen storage device (7) is released through a hydrogen release process and transported to the fuel cell power generation device (10) for power generation, and the generated electricity is used to supply power to the outside; During the hydrogen release process of the solid hydrogen storage device (7), circulating hot water is introduced to heat the solid hydrogen storage device (7) to ensure stable release of hydrogen; The fuel cell power generation device (10) generates a large amount of heat during power generation, and circulating cooling water is introduced to cool the fuel cell power generation device (10), while the temperature of the circulating cooling water increases; The circulating cooling water with increased temperature enters the heat recovery and heat storage device (14) to recover and store heat, and the circulating cooling water after heat recovery enters the cooling water device (12) to be cooled; The heat recovery and heat storage device (14) transports the hot water to the heat pump refrigeration device (13) to produce low-temperature circulating cooling water and supply it to the outside. At the same time, circulating hot water is introduced into the gas-liquid treatment device (5) to perform hot standby on the electrolyzer (4) to accelerate the startup speed of the system switching to the hydrogen production mode, and the remaining heat is supplied to the outside for heating.

10. A method for operating a heat management system of a hydrogen energy storage power station based on solid-state hydrogen storage, using the heat management system according to any one of claims 1 to 7, characterized in that: Shutdown hot standby modes include: When the electrolyzer (4) stops running, hot water is circulated in the gas-liquid processor (5) for hot standby, so as to accelerate the startup speed of the system switching to the hydrogen production mode; The heat recovery and heat storage device (14) provides circulating hot water to keep the hydrogen production system hot.

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