Photovoltaic-hydrogen energy comprehensive circulation and heat energy utilization device

Abstract

The invention aims to provide a photovoltaic-hydrogen energy comprehensive circulation and heat energy utilization device, which belongs to the field of clean energy heat energy utilization and comprises a photovoltaic energy storage system, a proton exchange membrane electrolytic cell hydrogen production system, a solid hydrogen storage system, a proton exchange membrane fuel cell power generation system and a heat energy recycling system. The photovoltaic energy storage system converts solar energy into electric energy to provide driving power for the proton exchange membrane electrolytic cell hydrogen production system, the proton exchange membrane electrolytic cell hydrogen production system produces hydrogen and stores the hydrogen in the solid hydrogen storage system, and the proton exchange membrane fuel cell power generation system uses the hydrogen in the solid hydrogen storage system as fuel to generate electric energy and generate water. And heat energy collected by the proton exchange membrane electrolytic cell hydrogen production system and the photovoltaic energy storage system is combined to provide high-temperature steam for the heat energy recycling system.

Description

TECHNICAL FIELD

[0001] The present application relates to a heat energy utilization device, in particular a clean energy heat energy utilization device. BACKGROUND

[0002] In today's global energy pattern, the contradiction between the rapid increase in energy demand and the unsustainable traditional energy mode is prominent. Industrialization and population growth drive energy demand to soar, while the depletion of fossil energy and the environmental problems it brings pose a serious challenge. Burning fossil fuels leads to greenhouse gas emissions, triggering global climate warming and other ecological crises, threatening human survival and development.

[0003] To seek sustainable energy solutions, the development and utilization of renewable energy has become an important development direction in the global energy field. Solar energy, as one of the most potential energies, has attracted much attention due to its widespread distribution and non-pollution. Photovoltaic power generation technology has made significant progress in recent years, but its power generation process is greatly affected by natural conditions such as light intensity, time, etc., and there are problems of intermittency and instability, which makes it difficult to rely solely on photovoltaic power generation to meet the continuous and stable energy demand.

[0004] At the same time, hydrogen energy, as a highly efficient and clean secondary energy, has high energy density, can be stored and transported, etc., and its position in the energy field is gradually rising. Proton exchange membrane electrolytic cell hydrogen production technology can use electric energy to decompose water into hydrogen and oxygen, providing an effective way to obtain hydrogen energy. Proton exchange membrane fuel cell can directly convert the chemical energy of hydrogen into electrical energy, with high energy conversion efficiency, zero emission, etc., and has broad application prospects in many fields.

[0005] However, the existing energy systems are independent of each other, lack of integration and collaboration, and the energy conversion and utilization efficiency is low, which cannot meet the complex energy demand. SUMMARY

[0006] The purpose of the present application is to provide a photovoltaic-hydrogen energy comprehensive cycle and heat energy utilization device that can realize efficient recycling of energy, improve system stability and reliability, and meet the energy demand of different fields.

[0007] The purpose of the present application is achieved as follows: The application discloses a photovoltaic-hydrogen energy comprehensive cycle and heat energy utilization device.

[0008] The application can further comprise: 1. The hydrogen production system of the proton exchange membrane electrolytic tank comprises a proton exchange membrane electrolytic tank, a first water tank, a heat dissipation pipeline, a hydrogen bypass pipeline, the proton exchange membrane electrolytic tank is provided with a hydrogen outlet, a hydrogen outlet, a water inlet, a heat dissipation water inlet, a heat dissipation water outlet, two ends of the heat dissipation pipeline are connected with the heat dissipation water inlet and the heat dissipation water outlet of the proton exchange membrane electrolytic tank respectively, the first water tank is connected with the water inlet of the proton exchange membrane electrolytic tank and the heat dissipation pipeline, a first water pump, a first three-way valve and a first heat exchanger are sequentially arranged between the first water tank and the water inlet, a second water pump and a first radiator are arranged on the heat dissipation pipeline, the hydrogen outlet is connected with a hydrogen outlet pipeline, a one-way valve, a first gas-water separator, a dryer, a first electromagnetic valve and a purifier are sequentially arranged on the hydrogen outlet pipeline, a first hydrogen bypass branch is branched between the first gas-water separator and the dryer, a second hydrogen bypass branch is branched between the first electromagnetic valve and the purifier, the first hydrogen bypass branch and the second hydrogen bypass branch are communicated with the hydrogen bypass pipeline, an oxygen outlet is connected with an oxygen outlet pipeline, a second gas-water separator is arranged on the oxygen outlet pipeline, the first gas-water separator and the second gas-water separator are connected with a liquid water pipeline, and the liquid water pipeline is connected with the first three-way valve.

[0009] 2. A first flame arrester is arranged on the oxygen outlet pipeline behind the second gas-water separator, a second flame arrester and an emptying tank are arranged at the tail of the hydrogen bypass pipeline, a first safety valve is installed on the first hydrogen bypass branch, and a second safety valve is installed on the second hydrogen bypass branch.

[0010] 3. The solid-state hydrogen storage device comprises an outer shell, a hydrogen storage tank is arranged in the outer shell, a hydrogen pipeline is arranged in the hydrogen storage tank, and a heat conduction pipe is wound outside the hydrogen storage tank; the hydrogen pipeline is communicated with the oxygen outlet pipeline and the hydrogen outlet pipeline respectively, and a second electromagnetic valve is installed on the oxygen outlet pipeline.

[0011] 4. The proton exchange membrane fuel cell power generation system comprises a proton exchange membrane fuel cell, a humidifier, the proton exchange membrane fuel cell comprises a fuel cell anode, a fuel cell cathode, the fuel cell anode is connected with an anode inlet pipeline and an anode outlet pipeline respectively, the fuel cell cathode is connected with a cathode inlet pipeline and a cathode outlet pipeline, the anode inlet pipeline is connected with a hydrogen outlet pipeline, an oxygen outlet pipeline and a hydrogen pipeline respectively, a hydrogen filter and an ejector are installed on the anode inlet pipeline, the anode outlet pipeline is connected with a hydrogen bypass pipeline, a third gas-water separator and a hydrogen discharge valve are installed on the anode outlet pipeline, a circulating pump pipeline is branched out between the third gas-water separator and the hydrogen discharge valve, a circulating pump is installed on the circulating pump pipeline and connected with the ejector, an air filter, an air compressor, a second heat exchanger and a four-way valve are installed on the cathode inlet pipeline in sequence, a third electromagnetic valve is installed on the cathode outlet pipeline, the cathode inlet pipeline and the cathode outlet pipeline pass through the humidifier, a liquid outlet of the third gas-water separator is connected with a separator liquid pipeline, the separator liquid pipeline and the cathode outlet pipeline are connected with a second three-way valve, and the second three-way valve is connected with a first water tank; the proton exchange membrane fuel cell is provided with a cell liquid outlet and a cell liquid inlet, the cell liquid outlet is connected with a cell liquid outlet pipeline, the cell liquid inlet is connected with a cell liquid inlet pipeline, a third water pump, a third three-way valve and a second radiator are installed on the cell liquid outlet pipeline, a particle filter, a deionizer and a second water tank are installed on the cell liquid inlet pipeline, an end of the cell liquid outlet pipeline is connected with the cell liquid inlet pipeline between the particle filter and the deionizer, the third three-way valve is connected with the cell liquid inlet pipeline through a heater pipeline, a heater is installed on the heater pipeline, and the second water tank is connected with the cell liquid outlet pipeline before the third water pump.

[0012] 5. The anode inlet pipeline between the hydrogen filter and the ejector is branched out with a third hydrogen bypass branch, the anode inlet pipeline between the ejector and the fuel cell anode is branched out with a fourth hydrogen bypass branch, the third hydrogen bypass branch and the fourth hydrogen bypass branch are connected with the hydrogen bypass pipeline, a third safety valve is installed on the third hydrogen bypass branch, and a fourth safety valve is installed on the fourth hydrogen bypass branch.

[0013] 6. The photovoltaic energy storage system comprises a photovoltaic panel, a converter, a reflector and a heat collection tank, the photovoltaic panel collects light energy and converts it into alternating current which is transmitted into the converter, the converter converts it into direct current, the reflector reflects sunlight to convert it into heat energy and collects it in the heat collection tank.

[0014] 7. The heat energy recycling system comprises a turbine, a third heat exchanger, a fourth heat exchanger, a third radiator, a compressor and a third water tank, the third water tank is connected with the cell liquid outlet pipeline, the heat collection tank is connected with the fourth heat exchanger, liquid water flowing out of the third water tank passes through the fourth heat exchanger and enters the turbine through a fourth three-way valve; steam discharged from the turbine enters the compressor after passing through the third heat exchanger and the third radiator, and then enters the turbine through the third heat exchanger and the fourth three-way valve.

[0015] The advantages of this invention are: 1. This invention achieves efficient coupling of photovoltaic, hydrogen production, storage, transportation, use and waste heat utilization systems. It uses heat and water as connecting media to communicate between the systems and achieve collaborative work, thereby improving the overall energy utilization efficiency of the system.

[0016] 2. This invention first generates hydrogen through a proton exchange membrane electrolyzer hydrogen production system, then a solid-state hydrogen storage system stores and releases the hydrogen, a fuel cell is responsible for the use of the hydrogen, and the resulting liquid water is further applied to the hydrogen production and thermal energy utilization system. This process realizes the supply and consumption of hydrogen energy, as well as the transfer and utilization of energy, thus improving system efficiency to a certain extent.

[0017] 3. The heat energy recovery and utilization system in this invention replenishes the liquid water required by the evaporator using the cooling water from the fuel cell system. Furthermore, the heat energy collected from the photovoltaic system and the proton exchange membrane electrolyzer hydrogen production system meets the heat exchange requirements of the evaporator. Simultaneously, the condensed liquid water is heated and pressurized by the compressor and utilizes the waste heat from power generation to achieve high-temperature gas circulation again. This system realizes the recovery and utilization of liquid water and reaction waste heat, improving the overall power generation efficiency of the system.

[0018] 4. This invention uses solar energy to convert and store electrical and thermal energy, uses liquid water as raw material to produce hydrogen, uses hydrogen and oxygen as reactants to convert and store electrical energy, and uses the waste heat and liquid water generated to recover and utilize thermal energy. Ultimately, it realizes the terminal integration of a comprehensive power generation system based on photovoltaic-hydrogen-thermal energy and ensures that the system source and emissions are carbon-free. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of a photovoltaic energy storage system. Figure 3 A schematic diagram of a proton exchange membrane electrolyzer hydrogen production system; Figure 4 This is a schematic diagram of a solid-state hydrogen storage device. Figure 5 This is a schematic diagram of a proton exchange membrane fuel cell system. Figure 6 This is a schematic diagram of a heat energy recovery and utilization system. Detailed Implementation

[0020] The invention will now be described in more detail with reference to the accompanying drawings: Combination Figures 1-6The application discloses a photovoltaic-hydrogen energy comprehensive cycle and heat energy utilization device, which comprises a photovoltaic energy storage system, a proton exchange membrane electrolytic cell hydrogen production system, a solid-state hydrogen storage system, a proton exchange membrane fuel cell power generation system and a heat energy recycling system. The photovoltaic energy storage system converts solar energy into electric energy to provide driving power for the proton exchange membrane electrolytic cell hydrogen production system. The proton exchange membrane electrolytic cell hydrogen production system produces hydrogen and stores the hydrogen in the solid-state hydrogen storage system. The proton exchange membrane fuel cell power generation system uses hydrogen in the solid-state hydrogen storage system as fuel to generate electric energy and produce water. The heat energy collected by the proton exchange membrane electrolytic cell hydrogen production system and the photovoltaic energy storage system is used to provide high-temperature steam for the heat energy recycling system.

[0021] Figure 2 The application discloses a photovoltaic-hydrogen energy comprehensive cycle and heat energy utilization device, which comprises a photovoltaic energy storage system, a proton exchange membrane electrolytic cell hydrogen production system, a solid-state hydrogen storage system, a proton exchange membrane fuel cell power generation system and a heat energy recycling system. The photovoltaic energy storage system converts solar energy into electric energy to provide driving power for the proton exchange membrane electrolytic cell hydrogen production system. The proton exchange membrane electrolytic cell hydrogen production system produces hydrogen and stores the hydrogen in the solid-state hydrogen storage system. The proton exchange membrane fuel cell power generation system uses hydrogen in the solid-state hydrogen storage system as fuel to generate electric energy and produce water. The heat energy collected by the proton exchange membrane electrolytic cell hydrogen production system and the photovoltaic energy storage system is used to provide high-temperature steam for the heat energy recycling system.

[0022] The hydrogen production system of the proton exchange membrane electrolyzer comprises a proton exchange membrane electrolyzer 10, a first water tank 5, a heat dissipation pipeline 101, a hydrogen bypass pipeline 102, the proton exchange membrane electrolyzer 10 is provided with a hydrogen outlet, a hydrogen outlet, a water inlet, a heat dissipation water inlet, a heat dissipation water outlet, two ends of the heat dissipation pipeline 101 are connected with the heat dissipation water inlet and the heat dissipation water outlet of the proton exchange membrane electrolyzer 10 respectively, the first water tank 5 is connected with the water inlet of the proton exchange membrane electrolyzer 10 and the heat dissipation pipeline 101, the first water tank 5 is sequentially provided with a first water pump 5, a first three-way valve 8 and a first heat exchanger 9 between the first water tank 5 and the water inlet, the heat dissipation pipeline 101 is provided with a second water pump 11 and a first radiator 12, the hydrogen outlet is connected with a hydrogen outlet pipeline 103, the hydrogen outlet pipeline 103 is sequentially provided with a check valve 13, a first gas-water separator 14, a dryer 15, a first electromagnetic valve 16 and a purifier 17, a first hydrogen bypass branch 104 is branched between the first gas-water separator 14 and the dryer 15, a second hydrogen bypass branch 105 is branched between the first electromagnetic valve 16 and the purifier 17, the first hydrogen bypass branch 104 and the second hydrogen bypass branch 105 are both communicated with the hydrogen bypass pipeline 102, an oxygen outlet is connected with an oxygen outlet pipeline 106, the oxygen outlet pipeline 106 is provided with a second gas-water separator 19, the first gas-water separator 14 and the second gas-water separator 19 are both connected with a liquid water pipeline 107, the liquid water pipeline 107 is connected with the first three-way valve 8, a first flame arrester 20 is arranged on the oxygen outlet pipeline 106 behind the second gas-water separator 19, a second flame arrester 23 and an emptying tank 14 are arranged at the tail of the hydrogen bypass pipeline 102, a first safety valve 21 is installed on the first hydrogen bypass branch 104, and a second safety valve 22 is installed on the second hydrogen bypass branch 105.

[0023] The first water tank 5 provides reactants for the electrolyzer, and the reactants flow into the electrolyzer reaction pole through the first water pump 6, the first flow meter 7 and the first heat exchanger 9. The second water pump 11 and the first radiator 12 are used to ensure the working temperature of the electrolyzer. The oxygen generated by the electrolyzer is discharged into the air through the second gas-water separator 19 and the first flame arrester 20. The hydrogen generated by the electrolyzer is separated, dried and purified through the check valve 13, the first gas-water separator 14, the dryer 15, the first electromagnetic valve 16 and the purifier 17. The first safety valve 21 and the second safety valve 22 ensure the safety of hydrogen in the pipeline, and are further connected to the second flame arrester 23 and the emptying tank 24. The liquid water collected through the two gas-water separators is collected into the electrolyzer supply side through the first three-way valve 8, so as to realize the reuse of the liquid water.

[0024] The solid hydrogen storage device 25 includes an outer casing 2501, a hydrogen storage tank 2502 inside the outer casing 2501, a hydrogen pipeline 2503 inside the hydrogen storage tank 2502, and a heat-conducting pipe 2504 wrapped around the outside of the hydrogen storage tank 2502; the hydrogen pipeline 2503 is connected to the oxygen outlet pipeline 106 and the hydrogen outlet pipeline 103 respectively, and a second solenoid valve 18 is installed on the oxygen outlet pipeline 106.

[0025] The hydrogen produced by the hydrogen production system flows into the solid hydrogen storage device under the action of the second solenoid valve 18. The heat pipe 2504 can effectively maintain the operating temperature required for the hydrogen charging and hydrogen evolution processes, thereby ensuring the effective operation of the processes.

[0026] The proton exchange membrane fuel cell power generation system includes a proton exchange membrane fuel cell 41 and a humidifier 38. The proton exchange membrane fuel cell 41 includes a fuel cell anode and a fuel cell cathode. The fuel cell anode is connected to an anode inlet pipe 108 and an anode outlet pipe 109, respectively. The fuel cell cathode is connected to a cathode inlet pipe 110 and a cathode outlet pipe 111. The anode inlet pipe 110 is connected to a hydrogen outlet pipe 103, an oxygen outlet pipe 106, and a hydrogen pipeline 2503, respectively. A hydrogen filter 26 is installed on the anode inlet pipe 110. The ejector 28 and the anode outlet pipe 109 are connected to the hydrogen bypass pipe 102. A third gas-water separator 30 and a hydrogen discharge valve 32 are installed on the anode outlet pipe 109. A circulation pump pipe 112 is branched between the third gas-water separator 30 and the hydrogen discharge valve 32. A circulation pump 31 is installed on the circulation pump pipe 112 and connected to the ejector 28. An air filter 33, an air compressor 35, a second heat exchanger 36, and a four-way valve 37 are installed sequentially on the cathode inlet pipe 110. A third solenoid valve 39 is installed on the cathode outlet pipe 111. Both the cathode outlet pipe 110 and the cathode outlet pipe 111 pass through the humidifier 38. The liquid outlet of the third gas-liquid separator 30 is connected to the separator liquid pipe 113. Both the separator liquid pipe 113 and the cathode outlet pipe 111 are connected to the second three-way valve 40, which is connected to the first water tank 5. The proton exchange membrane fuel cell 41 is equipped with a battery liquid outlet and a battery liquid inlet. The battery liquid outlet is connected to the battery liquid outlet pipe 114, and the battery liquid inlet is connected to the battery liquid inlet pipe 115. The third gas-liquid separator 30 is installed on the battery liquid outlet pipe 114. The system includes a water pump 42, a third three-way valve 43, a second radiator 44, a particulate filter 48, a deionizer 47, and a second water tank 46 installed on the battery liquid inlet pipe 115. The end of the battery liquid outlet pipe 114 is connected to the battery liquid inlet pipe 115 between the particulate filter 48 and the deionizer 47. The third three-way valve 43 is connected to the battery liquid inlet pipe 115 through the heater pipe 116. A heater 45 is installed on the heater pipe 116. The second water tank 46 is connected to the battery liquid outlet pipe 114 before the third water pump 42. A third hydrogen bypass branch 117 extends from the anode inlet pipe 108 between the hydrogen filter 26 and the ejector 28, and a fourth hydrogen bypass branch 118 extends from the anode inlet pipe 108 between the ejector 28 and the fuel cell anode. Both the third hydrogen bypass branch 117 and the fourth hydrogen bypass branch 118 are connected to the hydrogen bypass pipe 102. A third safety valve 27 is installed on the third hydrogen bypass branch 117, and a fourth safety valve 29 is installed on the fourth hydrogen bypass branch 118.

[0027] Hydrogen released from the solid-state hydrogen storage device flows into the fuel cell anode via hydrogen filter 26 and ejector 28. Third safety valve 27 and fourth safety valve 29 ensure the safe use of hydrogen within the pipeline. Third gas-liquid separator 30 separates gas and liquid at the anode outlet. Circulating gas (hydrogen) flows into ejector 28 via circulation pump 31, exhaust gas is discharged via hydrogen discharge valve 32, and liquid flows into second-way valve 40 via drain valve 31. Outside air flows into the cathode inlet of the fuel cell via air filter 33, second flow meter 34, air compressor 35, second heat exchanger 36, and humidifier 38. Air flowing out of the cathode outlet is discharged via humidifier 38 and third solenoid valve 39, and together with the depressurized air discharged from four-way valve 37, flows into second three-way valve 40. Finally, cooling water from the fuel cell stack and cooling water in water tank 46 flow into third water pump 42, and then through third three-way valve 43 into second radiator 44 and heater 45 respectively. The liquid water flowing out of the water tank merges with the cooling water after heating and heat dissipation, and then re-enters the fuel cell stack through the deionizer 47 and the particulate filter 48.

[0028] Figure 6 This is a schematic diagram of a heat energy recovery system. The core component is the turbine 50. This device mainly utilizes high-temperature, high-pressure steam or gas generated by an external heat source to drive the turbine 50 to rotate, thereby driving a generator to produce electricity, realizing the conversion process of thermal energy into kinetic energy into mechanical energy into electrical energy. The high-temperature steam has two main sources. First, the liquid water produced by the fuel cell flows into the third water tank 54. The liquid water flowing out of the third water tank 54, under the action of the high-temperature heat source in the heat collector 4, generates high-temperature steam through the fourth heat exchanger 55. Second, the steam discharged from the turbine 50 is gradually liquefied through the third heat exchanger 51 and the third radiator 52, and then heated and pressurized by the compressor 53, forming high-temperature steam through the third heat exchanger 51. Both streams of high-temperature steam flow into the turbine 50 through the fourth three-way valve 49 and generate electricity.

[0029] Furthermore, this invention also provides a working method for a distributed multi-source energy supply integrated system based on photovoltaic-hydrogen-thermal energy. According to the system's energy supply characteristics, the system operation is divided into two energy supply paths: electrical energy and thermal energy. The energy supply control method and mode are briefly summarized as follows: 1. When the distributed multifunctional integrated system based on photovoltaic-hydrogen-thermal energy is operating and generating electricity, the power generation device with fuel cells and turbines as the core provides stable power to users. When the power exceeds the required power consumption threshold, the generated power is stored in the energy storage battery through the inverter.

[0030] 2. The high-temperature liquid water produced from the fuel cell stack provides the water source required for the waste heat recovery device. The heat collected by the photovoltaic system and the proton exchange membrane electrolyzer hydrogen production system provides the liquid water evaporation effect for the waste heat recovery device. At the same time, the compressor provides high-temperature and high-pressure steam for the waste heat recovery device. The three together drive the turbine to generate electricity. The electricity generated here is stored in the energy storage battery through the inverter.

[0031] 3. Analyze the user's historical electricity consumption to determine the electricity demand within the specified period and whether the fuel cell's power generation meets the demand. If the demand is met, the electricity generated by the photovoltaic and turbine is stored in the energy storage battery, which can also provide power to other electrical components. If the demand is not met, the energy stored in the energy storage battery can supplement the fuel cell's power consumption.

[0032] As described above, this invention, based on a distributed multi-source functional integrated system of photovoltaic-hydrogen energy integrated cycle and thermal energy utilization device, utilizes solar energy, hydrogen energy, and thermal energy to achieve efficient energy and fuel supply, realizing the terminal inheritance of the photovoltaic-hydrogen-thermal energy integrated power generation system and the carbon-free source and emission of the system. Regarding the storage and utilization of thermal energy and liquid water, this invention achieves collaborative work between various systems and further improves the system's energy utilization efficiency. Simultaneously, this invention realizes the entire process of hydrogen production, storage, and utilization. Specifically, a proton exchange membrane electrolyzer produces hydrogen through the electrochemical reaction of deionized water, and through separation, drying, and purification operations, the hydrogen is further stored and released by a solid-state hydrogen storage device. Finally, the chemical energy to electrical energy conversion process is achieved through a fuel cell system. This process improves system efficiency to a certain extent. Furthermore, the solid-state hydrogen storage device in this invention achieves hydrogen storage and release through the chemical reaction between metal elements and hydrogen atoms, and achieves reversible hydrogen storage through the control of hydrogen storage temperature. The thermal energy recovery and utilization system achieves material recycling by further utilizing the stored thermal energy and the generated liquid water. In this system, the heat collected by the photovoltaic system and the proton exchange membrane electrolyzer hydrogen production system, along with the liquid water generated by the fuel cell, provides the reaction environment for the high-temperature steam required by the turbine. Simultaneously, the radiator and compressor provide an environment for the liquefaction, pressurization, heating, and distillation of the steam discharged from the turbine, achieving the goal of reusing the reaction waste gas. This process improves the overall power generation efficiency of the system.

Claims

1. A photovoltaic-hydrogen energy integrated cycle and thermal energy utilization device, characterized in that: The system includes a photovoltaic energy storage system, a proton exchange membrane electrolyzer hydrogen production system, a solid-state hydrogen storage system, a proton exchange membrane fuel cell power generation system, and a heat recovery and utilization system. The photovoltaic energy storage system converts solar energy into electrical energy to provide driving power for the proton exchange membrane electrolyzer hydrogen production system. The proton exchange membrane electrolyzer hydrogen production system produces hydrogen and stores it in the solid-state hydrogen storage system. The proton exchange membrane fuel cell power generation system uses the hydrogen in the solid-state hydrogen storage system as fuel to generate electricity and produce water. The heat energy collected by the proton exchange membrane electrolyzer hydrogen production system and the photovoltaic energy storage system provides high-temperature steam for the heat recovery and utilization system.

2. The photovoltaic-hydrogen energy integrated cycle and thermal energy utilization device according to claim 1, characterized in that: The proton exchange membrane electrolyzer hydrogen production system includes a proton exchange membrane electrolyzer, a first water tank, heat dissipation pipes, and a hydrogen bypass pipe. The proton exchange membrane electrolyzer is equipped with a hydrogen outlet, a water inlet, a heat dissipation inlet, and a heat dissipation outlet. The two ends of the heat dissipation pipes are connected to the heat dissipation inlet and heat dissipation outlet of the proton exchange membrane electrolyzer, respectively. The first water tank is connected to both the water inlet of the proton exchange membrane electrolyzer and the heat dissipation pipes. A first water pump, a first three-way valve, and a first heat exchanger are sequentially installed between the first water tank and the water inlet. A second water pump and a first radiator are installed on the heat dissipation pipes. The hydrogen outlet is connected to a hydrogen outlet pipeline. A one-way valve, a first gas-liquid separator, a dryer, a first solenoid valve, and a purifier are sequentially installed on the hydrogen outlet pipeline. A first hydrogen bypass branch extends between the first gas-liquid separator and the dryer. A second hydrogen bypass branch extends between the first solenoid valve and the purifier. Both the first and second hydrogen bypass branches are connected to the hydrogen bypass branch. The oxygen outlet is connected to an oxygen outlet pipeline. A second gas-liquid separator is installed on the oxygen outlet pipeline. Both the first and second gas-liquid separators are connected to a liquid water pipeline, which is connected to a first three-way valve.

3. The photovoltaic-hydrogen energy integrated cycle and thermal energy utilization device according to claim 2, characterized in that: A first flame arrester is installed on the oxygen outlet pipeline after the second gas-water separator, and a second flame arrester and a vent tank are installed at the end of the hydrogen bypass pipeline; a first safety valve is installed on the first hydrogen bypass branch, and a second safety valve is installed on the second hydrogen bypass branch.

4. The photovoltaic-hydrogen energy integrated cycle and thermal energy utilization device according to claim 1, characterized in that: The solid hydrogen storage device includes an outer shell, inside which is a hydrogen storage tank. The hydrogen storage tank is equipped with a hydrogen pipeline, and a heat-conducting pipe is wound around the outside of the hydrogen storage tank. The hydrogen pipeline is connected to an oxygen outlet pipeline and a hydrogen outlet pipeline, respectively. A second solenoid valve is installed on the oxygen outlet pipeline.

5. The photovoltaic-hydrogen energy integrated cycle and thermal energy utilization device according to claim 1, characterized in that: The proton exchange membrane fuel cell power generation system includes a proton exchange membrane fuel cell and a humidifier. The proton exchange membrane fuel cell includes a fuel cell anode and a fuel cell cathode. The fuel cell anode is connected to an anode inlet pipe and an anode outlet pipe, respectively. The fuel cell cathode is connected to a cathode inlet pipe and a cathode outlet pipe, respectively. The anode inlet pipe is connected to a hydrogen outlet pipe, an oxygen outlet pipe, and a hydrogen pipeline. A hydrogen filter and an ejector are installed on the anode inlet pipe. The anode outlet pipe is connected to a hydrogen bypass pipe. A third gas-liquid separator and a hydrogen discharge valve are installed on the anode outlet pipe. A circulation pump pipe extends between the third gas-liquid separator and the hydrogen discharge valve. A circulation pump is installed on the circulation pump pipe and connected to the ejector. An air filter, an air compressor, a second heat exchanger, and a four-way valve are sequentially installed on the cathode inlet pipe. A third solenoid valve is installed on the cathode outlet pipe. Both the cathode and cathode outlet pipelines pass through a humidifier. The liquid outlet of the third gas-liquid separator is connected to the separator liquid pipeline. Both the separator liquid pipeline and the cathode outlet pipeline are connected to a second three-way valve, which is connected to the first water tank. The proton exchange membrane fuel cell is equipped with a battery liquid outlet and a battery liquid inlet. The battery liquid outlet is connected to the battery liquid outlet pipeline, and the battery liquid inlet is connected to the battery liquid inlet pipeline. A third water pump, a third three-way valve, and a second radiator are installed on the battery liquid outlet pipeline. A particulate filter, a deionizer, and a second water tank are installed on the battery liquid inlet pipeline. The end of the battery liquid outlet pipeline is connected to the battery liquid inlet pipeline between the particulate filter and the deionizer. The third three-way valve is connected to the battery liquid inlet pipeline through a heater pipeline. A heater is installed on the heater pipeline. The second water tank is connected to the battery liquid outlet pipeline before the third water pump.

6. The photovoltaic-hydrogen energy integrated cycle and thermal energy utilization device according to claim 5, characterized in that: A third hydrogen bypass branch is branched from the anode inlet pipe between the hydrogen filter and the ejector, and a fourth hydrogen bypass branch is branched from the anode inlet pipe between the ejector and the fuel cell anode. Both the third and fourth hydrogen bypass branches are connected to the hydrogen bypass pipe. A third safety valve is installed on the third hydrogen bypass branch, and a fourth safety valve is installed on the fourth hydrogen bypass branch.

7. The photovoltaic-hydrogen energy integrated cycle and thermal energy utilization device according to claim 1, characterized in that: The photovoltaic energy storage system includes a photovoltaic panel, a converter, a reflector, and a heat collection tank. The photovoltaic panel collects light energy and converts it into alternating current, which is then fed into the converter. The converter converts the alternating current into direct current. The reflector reflects sunlight, which is then converted into heat energy and collected in the heat collection tank.

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