Hydrogen energy storage power station heat management system based on solid hydrogen storage

Abstract

The utility model provides a hydrogen energy storage power station heat management system based on solid hydrogen storage, which is characterized in that 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 bath 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 utility model 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 utility model relates to the technical field of hydrogen energy storage power stations, and in particular provides a heat management system for a hydrogen energy storage power station based on solid-state hydrogen storage. Background Art

[0002] As a large-scale, long-term energy storage medium and a key energy carrier, hydrogen will play a vital role in future energy supply systems. Hydrogen production through water electrolysis using renewable energy, particularly wind and solar power, will become a primary method of hydrogen production. Solid-state hydrogen storage is a safe storage method at room temperature and pressure. Combined with fuel cell power generation technology, it can facilitate the absorption of renewable energy, improve the grid's peak-shaving capacity, and maintain power system stability.

[0003] In conventional hydrogen energy storage power stations, the water electrolysis hydrogen production and fuel cell power generation processes 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 hydrogen production mode; the solid-state hydrogen storage device requires a large amount of low-temperature cooling water and hot water during the hydrogen absorption and release processes, respectively, resulting in a large amount of energy waste.

[0004] The shortcomings of existing hydrogen energy storage power station thermal management systems are that they fail to integrate thermal management with the system's own heating and cooling needs, nor do they incorporate solid-state hydrogen storage devices. Instead, they solely recover waste heat from water electrolysis or hydrogen fuel cell power generation. This waste heat is primarily used for external supply rather than for self-consumption. Without external heat users, this waste heat is largely wasted, failing to effectively improve system energy efficiency. A hydrogen energy storage power station thermal management system based on solid-state hydrogen storage and its operating method are urgently needed to address this issue. Utility Model Content

[0005] Based on this, the utility model provides a heat management system for a hydrogen energy storage power station based on solid-state hydrogen storage, which realizes heat 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 objectives, in a 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 circuit of the power generation device; the power interface of the electrochemical energy storage device is connected to the power supply circuit 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;

[0007] 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-circulation cooling water of the solid-state hydrogen storage device is circulated with the hydrogen charging heat exchanger, and the closed-circulation hot water is circulated with the hydrogen decompression 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-circulation 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.

[0008] Furthermore, the hydrogen charging heat exchanger includes a low-temperature closed-circuit cooling water inlet and a low-temperature closed-circuit cooling water outlet, the low-temperature closed-circuit cooling water inlet is connected to the low-temperature closed-circuit cooling water outlet of the solid-state hydrogen storage device, and the low-temperature closed-circuit cooling water outlet is connected to the low-temperature closed-circuit cooling water inlet of the solid-state hydrogen storage device.

[0009] Furthermore, the hydrogen decomposition 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.

[0010] Furthermore, the fuel cell heat exchanger includes a closed-circuit cooling water inlet and a closed-circuit cooling water outlet, the closed-circuit cooling water inlet is connected to the closed-circuit cooling water outlet of the fuel cell power generation device, and the closed-circuit cooling water outlet is connected to the closed-circuit cooling water inlet of the fuel cell power generation device.

[0011] 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.

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

[0013] 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 cooling interface. The circulating hot water inlet is connected to the circulating hot water outlet of the heat recovery and heat storage device, and the circulating hot water outlet is connected to the circulating hot water inlet of the heat recovery and heat storage device. The cooling interface supplies cooling to the outside.

[0014] In order to achieve the above objectives, in a second aspect, the present invention provides a method for operating a heat management system for a hydrogen energy storage power station based on solid-state hydrogen storage. The hydrogen production mode of the heat management system includes:

[0015] The power generation device transmits electricity 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 supplied to the outside.

[0016] The transformer and rectifier device transmits direct current to the electrolyzer to produce hydrogen. The generated hydrogen-alkali mixture and oxygen-alkali mixture are separated into gas and liquid by the gas-liquid processor to obtain crude hydrogen. The crude hydrogen enters the hydrogen purification device for purification to obtain high-purity hydrogen, which is then stored in the solid-state hydrogen storage device.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] During the operation of the hydrogen purification device and the hydrogen charging process of the solid-state hydrogen storage device, low-temperature circulating cooling water is introduced to cool the hydrogen purification device and the solid-state hydrogen storage device.

[0021] Furthermore, the fuel cell power generation mode of the thermal management system includes:

[0022] 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 to generate electricity, and the generated electricity is used to supply power to the outside world;

[0023] During the hydrogen release process of 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;

[0024] The fuel cell power generation device generates a lot of heat during power generation. Circulating cooling water is introduced to cool the fuel cell power generation device, and the circulating cooling water temperature increases.

[0025] 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.

[0026] 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 processor to perform hot standby on the electrolyzer to speed up the startup speed of the system switching to hydrogen production mode, and the remaining heat is supplied to the outside.

[0027] Furthermore, the thermal management system has a shutdown hot standby mode:

[0028] When the electrolyzer stops operating, hot water is circulated through the gas-liquid processor for hot standby, which speeds up the system's startup when switching to hydrogen production mode.

[0029] Circulating hot water is provided through heat recovery and heat storage devices to keep the hydrogen production system hot and ready.

[0030] The technical advantages of the heat management system for a hydrogen energy storage power station based on solid-state hydrogen storage and its working method provided by the present invention are at least reflected in:

[0031] By setting up solid-state hydrogen storage, heat recovery and heat storage devices and heat pump refrigeration devices, and conducting heat management of the hydrogen energy storage power station in the three working modes of hydrogen production, fuel cell power generation and shutdown hot standby, the waste heat generated in the process of water electrolysis hydrogen production and fuel cell power generation is recovered and stored. The heat is used for hydrogen discharge of the solid-state hydrogen storage device and hot standby of the electrolyzer, 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 surplus heat and cooling capacity can be used for external heating and cooling, thereby efficiently utilizing the waste heat generated in the process of water electrolysis hydrogen production and fuel cell power generation at the level of the hydrogen energy storage power station itself, and realizing surplus trigeneration of heat, cooling and electricity, thereby improving the energy efficiency and economy of the system operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] 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:

[0033] Figure 1This is a block diagram of a thermal management system for a hydrogen energy storage power station based on solid-state hydrogen storage.

[0034] Description of the accompanying drawings:

[0035] 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-state 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 storage device;

[0036] 15-first valve, 16-second valve, 17-third valve, 18-fourth valve, 19-fifth valve, 20-sixth valve, 21-seventh valve, 22-eighth valve, 23-ninth valve, 24-tenth valve, 25-eleventh valve, 26-twelfth valve. DETAILED DESCRIPTION

[0037] 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.

[0038] like Figure 1 As shown, a heat management system for 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 decomposition 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 interfaces of the transformer and rectifier device 2 and the electrochemical energy storage device 3, and supplies power to the outside.

[0039] The transformer and rectifier device 2 includes a power supply interface and a DC power supply interface. The power supply 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 supply interface of the electrolyzer 4.

[0040] 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.

[0041] The electrolytic cell 4 includes a power supply interface, a hydrogen-alkali mixture outlet, an oxygen-alkali mixture outlet, and an alkaline solution inlet. 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 alkaline solution inlet is connected to the alkaline solution outlet of the gas-liquid processor 5.

[0042] The gas-liquid processor 5 includes a hydrogen-alkali mixture inlet, an oxygen-alkali mixture inlet, an alkaline 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 alkaline solution outlet is connected to the alkaline 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.

[0043] 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-state 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.

[0044] The solid-state hydrogen storage device 7 includes a hydrogen inlet, a hydrogen outlet, a low-temperature closed-circuit cooling water inlet, a low-temperature closed-circuit cooling water outlet, a closed-circuit hot water inlet, and a closed-circuit 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-circuit cooling water inlet is connected to the low-temperature closed-circuit cooling water outlet of the hydrogen charging heat exchanger 8, the low-temperature closed-circuit cooling water outlet is connected to the low-temperature closed-circuit cooling water inlet of the hydrogen charging heat exchanger 8, the closed-circuit hot water inlet is connected to the closed-circuit hot water outlet of the hydrogen degassing heat exchanger 9, and the closed-circuit hot water outlet is connected to the closed-circuit hot water inlet of the hydrogen degassing heat exchanger 9.

[0045] 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-circuit cooling water inlet, and a low-temperature closed-circuit 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-circuit cooling water inlet is connected to the low-temperature closed-circuit cooling water outlet of the solid-state hydrogen storage device 7, and the low-temperature closed-circuit cooling water outlet is connected to the low-temperature closed-circuit cooling water inlet of the solid-state hydrogen storage device 7.

[0046] The hydrogen degassing heat exchanger 9 includes a circulating hot water inlet, a circulating hot water outlet, a closed-circuit hot water inlet, and a closed-circuit hot water outlet. The circulating hot water inlet is connected to a ninth valve 23, the circulating hot water outlet is connected to a tenth valve 24, the closed-circuit hot water inlet is connected to the closed-circuit hot water outlet of the solid-state hydrogen storage device 7, and the closed-circuit hot water outlet is connected to the closed-circuit hot water inlet of the solid-state hydrogen storage device 7.

[0047] 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-state 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, and the closed-circuit cooling water outlet is connected to the closed-circuit cooling water inlet of the fuel cell heat exchanger 11. The power supply interface provides external power.

[0048] The fuel cell heat exchanger 11 includes a circulating cooling water inlet, a circulating cooling water outlet, a closed-circuit cooling water inlet, and a closed-circuit 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-circuit cooling water inlet is connected to the closed-circuit cooling water outlet of the fuel cell power generation device 10, and the closed-circuit cooling water outlet is connected to the closed-circuit cooling water inlet of the fuel cell power generation device 10.

[0049] 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.

[0050] The heat pump refrigeration unit 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 cooling 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, and the circulating hot water outlet is connected to the circulating hot water inlet of the heat recovery and heat storage device 14. The cooling interface provides external cooling.

[0051] 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 heat supply 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 cooling water device 12. The circulating hot water inlet is connected to the circulating hot water outlet of 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 heat pump refrigeration device 13, the first valve 15, and the ninth valve 23. The heat supply interface supplies heat to the outside.

[0052] In the provided heat management system for a hydrogen energy storage power station based on solid-state hydrogen storage, the utility model 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 hydrogen discharge in the solid-state hydrogen storage device and hot standby of the electrolyzer, 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 through chemical adsorption and physical adsorption. Hydrogen fuel cells are chemical batteries that use the catalytic reaction of hydrogen and oxygen to generate water, and directly convert the released energy into electrical energy.

[0053] During implementation, the working method of the hydrogen energy storage power station heat management system based on solid-state hydrogen storage of the utility model 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:

[0054] (1) Hydrogen production mode

[0055] Power generation device 1 generates electricity and transmits it to transformer and rectifier device 2 for hydrogen production. The remaining electricity is preferentially stored in electrochemical energy storage device 3, and the remaining electricity is used to supply external power. Transformer and rectifier device 2 transmits direct current to electrolyzer 4 to begin hydrogen production. The resulting hydrogen-alkali mixture and oxygen-alkali mixture are separated by gas-liquid processor 5 to produce crude hydrogen. The crude hydrogen is then purified by hydrogen purification device 6 to produce high-purity hydrogen, which is then stored in a solid-state hydrogen storage device.

[0056] The hydrogen production process generates a large amount of heat, requiring circulating cooling water to cool the alkaline solution within the gas-liquid processor 5. Open the second valve 16 and the third valve 17, close the first valve 15 and the fourth valve 18, and allow circulating cooling water to cool the alkaline solution. This increases the outlet temperature of the circulating cooling water. The heated circulating cooling water enters the heat recovery and heat storage device 14, where it recovers and stores heat. After heat recovery, the circulating cooling water enters the cooling water device 12 for cooling. The heat recovery and heat storage device 14 delivers hot water to the heat pump refrigeration device 13, producing low-temperature circulating cooling water for external cooling, while the remaining heat is used for external heating.

[0057] The operation process of the hydrogen purification device 6 and the hydrogen charging process of the solid-state 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 allow low-temperature circulating cooling water to cool the hydrogen purification device 6 and the solid-state hydrogen storage device 7.

[0058] In the hydrogen production mode, the ninth valve 23 , the tenth valve 24 , the eleventh valve 25 , and the twelfth valve 26 remain closed.

[0059] (2) Fuel cell power generation mode

[0060] 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.

[0061] 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 stable release of hydrogen.

[0062] The fuel cell power generation device 10 generates a large amount of heat during power generation, requiring cooling. The eleventh and twelfth valves 25 and 26 are opened to allow circulating cooling water to cool the fuel cell power generation device 10, while simultaneously increasing the temperature of the circulating cooling water. The heated circulating cooling water enters the heat recovery and heat storage device 14, where it recovers and stores heat. After heat recovery, the circulating cooling water enters the cooling water device 12 for cooling. The heat recovery and heat storage device 14 delivers hot water to the heat pump refrigeration device 13, producing low-temperature circulating cooling water for external cooling. At the same time, circulating hot water is introduced into the gas-liquid processor 5 to provide hot standby for the electrolyzer 4, accelerating the system's startup when switching to hydrogen production mode. The first and fourth valves 15 and 18 are opened to allow the remaining heat to be supplied externally.

[0063] 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 closed.

[0064] (3) Shutdown hot standby mode

[0065] When the electrolyzer 4 stops operating, 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.

[0066] Open the first valve 15 and the fourth valve 18, and provide circulating hot water through the heat recovery and heat storage device 14 to keep the hydrogen production system hot.

[0067] In 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.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and not to limit it; although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents; without departing from the spirit of the technical solution of the utility model, they should all be included in the scope of the technical solution for protection of the utility model.

Claims

1. A heat 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), the power interface of which is connected to the power supply line of the power generation device (1); The electrochemical energy storage device (3) has a power supply interface connected to the power supply line of the power generation device (1), and a discharge interface connected to the 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 processor (5) has a hydrogen-alkali mixture inlet connected to a hydrogen-alkali mixture outlet of the electrolytic cell (4), an oxygen-alkali mixture inlet connected to an oxygen-alkali mixture outlet of the electrolytic cell (4), and an alkali solution outlet connected to an 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-state 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-state 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 The fuel cell power generation device (10) has a hydrogen inlet connected to a hydrogen outlet of a solid-state hydrogen storage device (7), the closed-loop cooling water of the fuel cell power generation device (10) is circulated with the fuel cell heat exchanger (11), and the power supply interface supplies power to the outside.

2. The heat management system for a hydrogen energy storage power station based on solid-state hydrogen storage according to claim 1, characterized in that: The hydrogen charging heat exchanger (8) includes a low-temperature closed-circulation cooling water inlet and a low-temperature closed-circulation cooling water outlet, wherein 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 for a hydrogen energy storage power station based on solid-state hydrogen storage according to claim 1, characterized in that: The hydrogen degassing heat exchanger (9) includes a closed-circulation hot water inlet and a closed-circulation hot water outlet, wherein 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, characterized in that: The fuel cell heat exchanger (11) comprises a closed-circulation cooling water inlet and a closed-circulation cooling water outlet, wherein 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), wherein the cooling water device (12) comprises a circulating cooling water inlet and a circulating cooling water outlet, wherein the circulating cooling water inlet is 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, 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 the circulating cooling water inlet of the cooling water device (12), and the heat supply interface supplying heat to the outside.

7. The heat management system for a hydrogen energy storage power station based on solid-state hydrogen storage according to claim 6, 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 cooling interface, the circulating hot water inlet being connected to the circulating hot water outlet of the heat recovery and heat storage device (14), the circulating hot water outlet being connected to the circulating hot water inlet of the heat recovery and heat storage device (14), and the cooling interface supplying cooling to the outside.

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