Hydrogen storage and supply device and hydrogen fuel cell cogeneration system

Abstract

The utility model discloses a hydrogen storage and supply device and a hydrogen fuel cell heat and power cogeneration system, and relates to the technical field of fuel cells. The hydrogen storage and supply device realizes normal-temperature and normal-pressure storage of hydrogen on the basis of a liquid organic matter hydrogen storage technology, and the principle is that hydrogen storage is realized by virtue of reversible reaction and hydrogenation reaction of unsaturated liquid organic matters such as olefin, alkyne or aromatic hydrocarbon and hydrogen, and hydrogen release is realized by virtue of dehydrogenation reaction. According to the liquid organic matter hydrogen storage technology, the hydrogen storage density is 5%-10%, and the hydrogen storage amount is large; and the hydrogen storage carrier is a liquid organic matter, normal-temperature and normal-pressure transportation can be achieved, convenience and safety are achieved, the requirement for the hydrogen liquid tank is low, and hydrogen leakage is basically avoided during transportation. And during dehydrogenation reaction, the temperature required by hydrogen desorption is low, the energy consumption is low, the hydrogen desorption rate is adjustable, and the hydrogen desorption device can be adapted to various hydrogen fuel cells. The hydrogen fuel cell heat and power cogeneration system collects and utilizes the lost heat of the cell, so that the comprehensive utilization rate of the hydrogen fuel cell is improved.

Description

Technical Field

[0001] This utility model relates to the field of fuel cell technology, and in particular to a hydrogen storage and supply device and a hydrogen fuel cell combined heat and power system. Background Technology

[0002] Hydrogen energy, as a storable secondary energy source, can be efficiently converted into various forms of energy, including heat, chemical energy, power, and electricity. Taking hydrogen fuel cells as an example, after producing hydrogen through water electrolysis, the resulting hydrogen gas is compressed into a high-pressure gas for storage, ready to be supplied to the fuel cell when needed. High-pressure hydrogen requires the storage tank to withstand significant pressure, placing high demands on the tank's materials, increasing costs, and posing safety hazards. Furthermore, hydrogen molecules are small, lightweight, and have high thermal velocity, making them prone to escape from gaps in the container. When transported in a gaseous state, hydrogen is easily leaked, resulting in significant hydrogen loss. Utility Model Content

[0003] The purpose of this invention is to provide a hydrogen storage and supply device and a hydrogen fuel cell combined heat and power system, which can store hydrogen using liquid organic matter, can achieve normal temperature and pressure transportation, is convenient and safe, and is not prone to leakage, thereby solving the problems existing in the prior art.

[0004] To achieve the above purpose, the present invention provides the following solutions:

[0005] This invention provides a hydrogen storage and supply device, comprising a hydrogen liquid tank, a pump, a dehydrogenation reactor, and a gas-liquid separator connected in sequence. The hydrogen liquid tank is used to store hydrides generated by a reversible reaction and hydrogenation reaction between liquid organic matter and hydrogen, thereby achieving hydrogen storage. The pump is used to transport the hydrides in the hydrogen liquid tank to the dehydrogenation reactor, which is used to dehydrogenate the hydrides to release hydrogen. The gas-liquid separator is used to receive the reaction products of the dehydrogenation reactor, thereby separating the hydrogen from the released liquid organic matter.

[0006] In one embodiment, a control valve is further connected between the hydrogen tank and the pump, the control valve being used to control the outflow of the hydride from the hydrogen tank.

[0007] In one embodiment, the hydrogen storage and supply device further includes a flow meter connected to the gas discharge port of the gas-liquid separator, the flow meter being used to measure the flow rate of hydrogen gas flowing through it.

[0008] In one embodiment, the hydrogen storage and supply device further includes a controller, and the flow meter and the dehydrogenation reactor are both communicatively connected to the controller. The controller can control the temperature of the dehydrogenation reactor through the flow detection signal of the flow meter, thereby controlling the hydrogen release rate.

[0009] In one embodiment, the dehydrogenation reactor has a feed pipe at its inlet and a discharge pipe at its outlet. A pipe bundle, comprising multiple feed branch pipes, is installed inside the dehydrogenation reactor. The inlet of the feed pipe is connected to a pump, the outlet of the feed pipe is connected to the feed end of the pipe bundle, the discharge end of the pipe bundle is connected to the inlet of the discharge pipe, and the outlet of the discharge pipe is connected to the gas-liquid separator.

[0010] In one embodiment, the hydrogen storage and supply device further includes a liquid storage tank connected to the liquid discharge port of the gas-liquid separator, the liquid storage tank being used to collect liquid organic matter after hydrogen release.

[0011] This utility model also proposes a hydrogen fuel cell combined heat and power system, including a power system, a heat system, and a hydrogen storage and supply device as described in any one of the above, wherein:

[0012] The power system includes a distribution box and a hydrogen fuel cell. The hydrogen fuel cell is electrically connected to the distribution box and is used to supply current to the distribution box. The distribution box can supply power to the hydrogen storage and supply device and the heat system.

[0013] The hydrogen output terminal of the hydrogen storage and supply device is connected to the hydrogen fuel cell via control valve two. The hydrogen storage and supply device is used to supply hydrogen to the hydrogen fuel cell.

[0014] A heat transfer path is established between the heat input terminal of the heat-using system and the hydrogen fuel cell, and the hydrogen fuel cell is used to supply the heat generated during the power generation process to the heat-using system.

[0015] In one embodiment, an inverter is also connected between the hydrogen fuel cell and the distribution box. The inverter can convert the direct current generated by the hydrogen fuel cell into alternating current and transmit the alternating current to the distribution box. The distribution box is also connected to the mains power supply.

[0016] In one embodiment, the heat system is an air source heat pump, which includes an evaporator, a compressor, a heat exchanger, a storage tank, a filter, and an expansion valve. The evaporator, the compressor, the heat exchanger, the storage tank, the filter, and the expansion valve are connected in sequence, and the expansion valve is connected to the evaporator to form a closed loop of working fluid circulation. The heat exchanger is used to heat the cold water coming in from the user side, and the evaporator is connected to the hydrogen fuel cell through a heat recovery module to form the heat transfer path.

[0017] In one embodiment, the heat recovery module includes a cooling pipe, an air preheater, a liquid storage tank, and a second pump. The cooling pipe is embedded inside the hydrogen fuel cell or attached to the surface of the hydrogen fuel cell. One end of the cooling pipe passes sequentially through the air preheater, the liquid storage tank, and the second pump, and is connected to the other end of the cooling pipe to form a coolant circulation channel. The coolant circulation channel is filled with coolant, which is used to absorb heat from the hydrogen fuel cell and transfer it to the air preheater. The air preheater is connected to the evaporator to transfer heat to the evaporator.

[0018] The present invention achieves the following technical advantages over the prior art:

[0019] This utility model discloses a novel and reasonable hydrogen storage and supply device. Based on liquid organic hydrogen storage technology (LOHC), it achieves ambient temperature and pressure hydrogen storage. The principle involves reversible reactions (hydrogenation) between hydrogen and certain unsaturated liquid organic compounds such as olefins, alkynes, or aromatic hydrocarbons to achieve hydrogen storage (chemical bonding), followed by hydrogen release through dehydrogenation (heating) reactions. This liquid organic hydrogen storage technology has a hydrogen storage density of 5%–10%, providing a large hydrogen storage capacity. Furthermore, the hydrogen storage carrier is a liquid organic compound, enabling convenient and safe transport at ambient temperature and pressure. It also has low requirements for the hydrogen tank and virtually eliminates hydrogen leakage during transport. The dehydrogenation reaction requires low temperatures and consumes little energy, and the hydrogen release rate is adjustable, making it compatible with various hydrogen fuel cells.

[0020] Traditional hydrogen fuel cells typically achieve a conversion efficiency of only 40% to 50% during power generation, with the remaining energy being lost as heat. This invention's hydrogen fuel cell combined heat and power system collects and utilizes this lost heat, improving the overall utilization rate of the hydrogen fuel cell and achieving an overall hydrogen utilization efficiency of over 80%, significantly enhancing energy efficiency. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the hydrogen storage and supply device disclosed in the embodiments of this utility model;

[0023] Figure 2 This is a schematic diagram of the dehydrogenation reactor in the hydrogen storage and supply device disclosed in this embodiment of the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the hydrogen fuel cell combined heat and power system disclosed in an embodiment of this utility model.

[0025] In the figure, the reference numerals are: 100, hydrogen fuel cell combined heat and power system; 200, hydrogen storage and supply device; 300, power system; 400, heat system;

[0026] 1. Hydrogen liquid tank; 2. Control valve one; 3. Pump one; 4. Dehydrogenation reactor; 41. Feed pipe; 42. Feed branch pipe; 43. Discharge pipe; 5. Gas-liquid separator; 6. Storage tank; 7. Flow meter; 8. Control valve two; 9. Hydrogen fuel cell; 10. Inverter; 11. Evaporator; 12. Compressor; 13. Heat exchanger; 14. Storage tank; 15. Filter; 16. Expansion valve; 17. Distribution box; 18. Controller; 19. Air preheater; 20. Storage tank; 21. Pump two. Detailed Implementation

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] One of the objectives of this invention is to provide a novel hydrogen storage and supply device that can store hydrogen using liquid organic matter, can achieve normal temperature and pressure transportation, is convenient and safe, and is not prone to leakage, thereby solving the problems existing in the prior art.

[0029] Another objective of this invention is to provide a hydrogen fuel cell combined heat and power system that includes the aforementioned hydrogen storage and supply device.

[0030] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Example 1

[0032] like Figure 1As shown, this embodiment provides a hydrogen storage and supply device 200, including a hydrogen liquid tank 1, a pump 3, a dehydrogenation reactor 4, and a gas-liquid separator 5 connected in sequence. The hydrogen liquid tank 1 is used to store hydrides generated by the reversible reaction and hydrogenation reaction of liquid organic matter and hydrogen, so as to realize hydrogen storage. The pump 3 is used to transport the hydrides in the hydrogen liquid tank 1 to the dehydrogenation reactor 4. The dehydrogenation reactor 4 is used to dehydrogenate the hydrides to realize hydrogen release. The gas-liquid separator 5 is used to receive the reaction products of the dehydrogenation reactor 4 to realize the separation of hydrogen from the released liquid organic matter.

[0033] In one embodiment, a control valve 2 is also connected between the hydrogen tank 1 and the pump 3. The control valve 2 is used to control the outflow of hydride from the hydrogen tank 1.

[0034] In one embodiment, the hydrogen storage and supply device 200 further includes a flow meter 7 connected to the gas discharge port of the gas-liquid separator 5, the flow meter 7 being used to measure the flow rate of hydrogen gas flowing through it.

[0035] In one embodiment, the hydrogen storage and supply device 200 further includes a controller 18, and the flow meter 7 and the dehydrogenation reactor 4 are all communicatively connected to the controller 18. The controller 18 can control the temperature of the dehydrogenation reactor 4 through the flow detection signal of the flow meter 7, thereby controlling the hydrogen release rate.

[0036] In one embodiment, the dehydrogenation reactor 4 is a standard product based on heating dehydrogenation, and its specific structure and working principle will not be described in detail here. The dehydrogenation reactor 4 has a feed pipe 41 at its inlet and a discharge pipe 43 at its outlet. A pipe bundle is installed inside the dehydrogenation reactor 4, including multiple parallel conveying branch pipes 42. The inlet of the feed pipe 41 is connected to pump 3, the outlet of the feed pipe 41 is connected to the feed end of the pipe bundle (i.e., the inlet of all conveying branch pipes 42), the discharge end of the pipe bundle (i.e., the outlet of all conveying branch pipes 42) is connected to the inlet of the discharge pipe, and the outlet of the discharge pipe is connected to the inlet of the gas-liquid separator 5. The gas-liquid separator 5 is a standard product, and its specific structure and working principle will not be described in detail here.

[0037] In one embodiment, the hydrogen storage and supply device 200 further includes a liquid storage tank 6 connected to the liquid discharge port of the gas-liquid separator 5, the liquid storage tank 6 being used to collect liquid organic matter after hydrogen release.

[0038] The working process and working principle of the above-mentioned hydrogen storage and supply device 200 are as follows:

[0039] Hydrogen tank 1 stores hydrogenated liquid organic matter, called hydride. Hydrogen tank 1 is connected to control valve 2, which controls the outflow of hydride. Control valve 2 is also connected to pump 3, which controls the flow rate of hydride. Pump 3 is connected to dehydrogenation reactor 4. After power is supplied, the internal temperature of dehydrogenation reactor 4 gradually rises to the optimal temperature for hydride release. The hydride enters through feed pipe 41 and is dispersed into various feed branch pipes 42. Feed branch pipes 42 are thinner tubes with a smaller cross-sectional area than feed pipe 41 and outlet pipe 43. The arrangement of the pipe bundle helps to increase the heating area of ​​the hydride within dehydrogenation reactor 4. The hydride undergoes a dehydrogenation reaction in dehydrogenation reactor 4, realizing hydrogen dehydrogenation. After dehydrogenation, the hydrogen released from each feed branch pipe 42 and the released liquid organic matter (carrier) all flow into the discharge pipe 43, and then are transported to the gas-liquid separator 5. In the gas-liquid separator 5, the hydrogen released from the dehydrogenation reaction is separated from the released liquid organic matter (carrier), and the liquid organic matter (carrier) flows into the storage tank 6. The hydrogen flows through the flow meter 7, which measures the flow rate of the hydrogen and sends an electrical signal (i.e., a flow detection signal) to the controller 18. The controller 18 controls the current flowing into the dehydrogenation reactor 4 through this electrical signal to control the temperature of the dehydrogenation reactor 4, thereby controlling the progress of the dehydrogenation reaction and regulating the hydrogen release rate, which is more flexible.

[0040] The aforementioned hydrogen storage and supply device 200 utilizes liquid organic hydrogen storage (LOHC) technology to achieve ambient temperature and pressure hydrogen storage. The principle involves reversible reactions (chemical bonding) between hydrogen and unsaturated liquid organic compounds such as olefins, alkynes, or aromatic hydrocarbons, followed by dehydrogenation (heating) to release the hydrogen. This LOHC technology offers a hydrogen storage density of 5%–10%, providing a large storage capacity. Furthermore, the liquid organic storage carrier allows for convenient and safe transport at ambient temperature and pressure, minimizing requirements on the hydrogen tank and virtually eliminating hydrogen leakage during transport. The dehydrogenation reaction requires low temperatures and consumes little energy, with an adjustable release rate, making it compatible with various hydrogen fuel cells.

[0041] Example 2

[0042] like Figure 3As shown, this embodiment proposes a hydrogen fuel cell combined heat and power system 100, including a power system 300, a heat supply system 400, and a hydrogen storage and supply device 200 as disclosed in Embodiment 1. The power system 300 includes a distribution box 17 and a hydrogen fuel cell 9. The hydrogen fuel cell 9 is electrically connected to the distribution box 17 and supplies current to the distribution box 17, which in turn supplies power to the hydrogen storage and supply device and the heat supply system. The hydrogen output terminal of the hydrogen storage and supply device 200, i.e., the flow meter 7, is connected to the hydrogen fuel cell 9 via a control valve 8, and the hydrogen storage and supply device 200 supplies hydrogen to the hydrogen fuel cell 9. A heat transfer path is established between the heat input terminal of the heat supply system 400 and the hydrogen fuel cell 9, and the hydrogen fuel cell 9 supplies the heat generated during power generation to the heat supply system 400.

[0043] In one embodiment, an inverter 10 is also connected between the hydrogen fuel cell 9 and the distribution box 17. The inverter 10 can convert the direct current generated by the hydrogen fuel cell 9 into alternating current and transmit the alternating current to the distribution box 17. The distribution box 17 is also connected to the mains power.

[0044] In one embodiment, the heat system 400 is preferably an air-source heat pump, which includes an evaporator 11, a compressor 12, a heat exchanger 13, a storage tank 14, a filter 15, and an expansion valve 16. The evaporator 11, compressor 12, heat exchanger 13, storage tank 14, filter 15, and expansion valve 16 are connected in sequence, and the expansion valve 16 is connected to the evaporator 11 to form a closed-loop working fluid circulation. The heat exchanger 13 is used to heat the cold water coming in from the user side and supply the heated hot water to the user side. The evaporator 11 is connected to the hydrogen fuel cell 9 through a heat recovery module, forming the aforementioned heat transfer path.

[0045] In one embodiment, the heat recovery module includes a cooling pipe, an air preheater 19, a liquid storage tank 20, and a pump 21. The cooling pipe is embedded inside the hydrogen fuel cell 9 (isolated from the internal structure of the hydrogen fuel cell 9) or attached to the surface of the hydrogen fuel cell 9. The cooling pipe can be coiled on the surface or inside the hydrogen fuel cell 9 to increase the heat exchange area. Figure 3As shown, one end of the cooling pipe connects to the other end via an air preheater 19, a liquid storage tank 20, and a second pump 21, forming a coolant circulation channel. This channel is filled with coolant (such as water or other refrigerant). The coolant circulates within the channel under the action of the second pump 21. After absorbing heat from the hydrogen fuel cell 9, the coolant flows to the air preheater 19. In the air preheater 19, the heat-absorbing coolant transfers heat to the air. The air preheater 19 is connected to the evaporator 11 and transfers heat to it, thus transferring the heat generated by the hydrogen fuel cell 9 to the evaporator 11. The heat exchanger 13 simultaneously absorbs heat from the air and the heat transferred from the air preheater 19 (i.e., the heat generated by the hydrogen fuel cell 9) to supply heat to the air source heat pump. In the air source heat pump, the refrigerant absorbs heat from the preheated air (this heat is the sum of air heat and heat generated by the fuel cell) in the evaporator 11 and then vaporizes, changing from a liquid state to a low-temperature, low-pressure gaseous state. The refrigerant then circulates within the air source heat pump, continuously heating the chilled water on the user side. In the heat recovery module, the coolant transfers heat to the air preheater 19 and flows into the storage tank 20. Finally, pump 21 delivers the heat-exchanged coolant back to the cooling pipes, achieving coolant recycling.

[0046] The working process and working principle of the above-mentioned hydrogen fuel cell combined heat and power system 100 are as follows:

[0047] First, the hydrogen storage and supply device 200 operates. The hydrogen tank 1 stores hydrogenated liquid organic matter, called hydride. The hydrogen tank 1 is connected to control valve 2, which controls the outflow of hydride. Control valve 2 is also connected to pump 3, which controls the flow rate of the hydride. Pump 3 is connected to the dehydrogenation reactor 4. After power is turned on, the internal temperature of the dehydrogenation reactor 4 gradually rises to the optimal temperature for hydride release. The hydride enters through the feed pipe 41 and disperses into various conveying branch pipes 42. The conveying branch pipes 42 are thinner tubes with a smaller cross-sectional area than the feed pipe 41 and the discharge pipe 43. The arrangement of the pipe bundle helps to increase the heating area of ​​the hydride within the dehydrogenation reactor 4. The hydride undergoes dehydrogenation... Hydrogen reactor 4 undergoes a dehydrogenation reaction to release hydrogen. After dehydrogenation, the hydrogen released from each feed branch pipe 42 and the released liquid organic matter (carrier) all flow into the discharge pipe 43, which then transports the hydrogen to the gas-liquid separator 5. In the gas-liquid separator 5, the hydrogen released from the dehydrogenation reaction is separated from the released liquid organic matter (carrier), and the liquid organic matter (carrier) flows into the storage tank 6. Hydrogen flows through the flow meter 7, which measures the flow rate of the hydrogen and sends an electrical signal (i.e., a flow detection signal) to the controller 18. The controller 18 uses this electrical signal to control the current flowing into the dehydrogenation reactor 4, thereby controlling the temperature of the dehydrogenation reactor 4 and thus regulating the hydrogen release rate.

[0048] In the power system 300, control valve 8 controls the flow of hydrogen from the hydrogen storage and supply device 200 into the hydrogen fuel cell 9; the hydrogen fuel cell 9 is electrically connected to the inverter 10, which converts the DC power generated by the hydrogen fuel cell 9 into AC power and transmits the AC power to the distribution box 17.

[0049] In the heat system 400, the heat generated by the hydrogen fuel cell 9 is transferred to the air preheater 19 through the coolant. In the air preheater 19, the coolant absorbs heat and transfers the heat to the air. The air preheater 19 is connected to the evaporator 11 and transfers the heat to the evaporator 11. After the coolant transfers the heat to the air preheater 19, it flows into the storage tank 20. Finally, the pump 21 delivers the heat-exchanged coolant back to the cooling pipe, realizing the recycling of the coolant. Evaporator 11 utilizes the absorbed heat from the air and the heat generated by the hydrogen fuel cell 9 to vaporize the refrigerant (which may be R32) into a low-pressure gaseous working fluid. Evaporator 11 is connected to compressor 12, which compresses the low-pressure gaseous working fluid into a high-temperature, high-pressure gaseous working fluid. Compressor 12 is connected to heat exchanger 13, where the high-temperature, high-pressure gaseous working fluid heats cold water from the user side into hot water. Heat exchanger 13 is connected to storage tank 14, which stores the working fluid that has become liquid after heat exchange in heat exchanger 13. Storage tank 14 is connected to filter 15, which filters out impurities from the working fluid in storage tank 14. Filter 15 is connected to expansion valve 16, where the working fluid, after impurities are removed, is throttled and cooled by expansion valve 16 before flowing back into evaporator 11, forming a cycle.

[0050] In the power system 300, the inputs of the distribution box 17 include mains power and electricity generated by the hydrogen fuel cell 9, and the outputs include electricity input to the dehydrogenation reactor 4 and the compressor 12. At the start of operation of the entire hydrogen fuel cell cogeneration system 100, the mains power supply mainly supplies the entire system. After the hydrogen output from the hydrogen storage and supply device 200 stabilizes and the electricity generated by the hydrogen fuel cell 9 becomes stable, the electricity generated by the hydrogen fuel cell 9 becomes the primary power source for the entire hydrogen fuel cell cogeneration system 100, achieving self-sufficiency in electricity production, which is beneficial for energy conservation and environmental protection.

[0051] The hydrogen fuel cell 9 can specifically be a PEM hydrogen fuel cell.

[0052] Traditional hydrogen fuel cells typically achieve a conversion efficiency of only 40% to 50% during power generation, with the remaining energy being lost as heat. The hydrogen fuel cell combined heat and power system 100 in this solution collects and utilizes this lost heat, improving the overall utilization rate of the hydrogen fuel cell and achieving an overall hydrogen utilization efficiency of over 80%, significantly enhancing energy efficiency.

[0053] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A hydrogen storage and supply device, characterized in that, The system includes a hydrogen tank (1), a pump (3), a dehydrogenation reactor (4), and a gas-liquid separator (5) connected in sequence. The hydrogen tank (1) is used to store hydrides generated by the reversible reaction and hydrogenation reaction between liquid organic matter and hydrogen, so as to realize the storage of hydrogen. The pump (3) is used to transport the hydrides in the hydrogen tank (1) to the dehydrogenation reactor (4). The dehydrogenation reactor (4) is used to dehydrogenate the hydrides to realize the release of hydrogen. The gas-liquid separator (5) is used to receive the reaction products of the dehydrogenation reactor (4) to realize the separation of hydrogen from the released liquid organic matter.

2. The hydrogen storage and supply device according to claim 1, characterized in that, A control valve (2) is also connected between the hydrogen tank (1) and the pump (3), and the control valve (2) is used to control the outflow of the hydride in the hydrogen tank (1).

3. The hydrogen storage and supply device according to claim 1, characterized in that, It also includes a flow meter (7) connected to the gas outlet of the gas-liquid separator (5), the flow meter (7) being used to measure the flow rate of hydrogen.

4. The hydrogen storage and supply device according to claim 3, characterized in that, It also includes a controller (18), and the flow meter (7) and the dehydrogenation reactor (4) are both connected to the controller (18). The controller (18) can control the temperature of the dehydrogenation reactor (4) through the flow detection signal of the flow meter (7), thereby controlling the hydrogen release rate.

5. The hydrogen storage and supply device according to any one of claims 1 to 4, characterized in that, The dehydrogenation reactor (4) is provided with a feed pipe (41) at its inlet and a discharge pipe (43) at its outlet. A pipe bundle is provided inside the dehydrogenation reactor (4), and the pipe bundle includes multiple feed branch pipes (42). The inlet of the feed pipe (41) is connected to the pump (3), the outlet of the feed pipe (41) is connected to the feed end of the pipe bundle, the discharge end of the pipe bundle is connected to the inlet of the discharge pipe (43), and the outlet of the discharge pipe (43) is connected to the gas-liquid separator (5).

6. The hydrogen storage and supply device according to any one of claims 1 to 4, characterized in that, It also includes a liquid storage tank (6) connected to the liquid discharge port of the gas-liquid separator (5), the liquid storage tank (6) being used to collect the liquid organic matter after hydrogen release.

7. A hydrogen fuel cell combined heat and power system, characterized in that, It includes a power system (300), a heat system (400), and a hydrogen storage and supply device (200) as described in any one of claims 1 to 6, wherein: The power system (300) includes a distribution box (17) and a hydrogen fuel cell (9). The hydrogen fuel cell (9) is electrically connected to the distribution box (17) and is used to supply current to the distribution box (17). The distribution box (17) can supply power to the hydrogen storage and supply device (200) and the heat system (400). The hydrogen output end of the hydrogen storage and supply device (200) is connected to the hydrogen fuel cell (9) through control valve two (8), and the hydrogen storage and supply device (200) is used to supply hydrogen to the hydrogen fuel cell (9); A heat transfer path is established between the heat input end of the heat system (400) and the hydrogen fuel cell (9), and the hydrogen fuel cell (9) is used to supply the heat generated during the power generation process to the heat system (400).

8. The hydrogen fuel cell cogeneration system according to claim 7, characterized in that, An inverter (10) is also connected between the hydrogen fuel cell (9) and the distribution box (17). The inverter (10) can convert the direct current generated by the hydrogen fuel cell (9) into alternating current and transmit the alternating current to the distribution box (17). The distribution box (17) is also connected to the mains power.

9. The hydrogen fuel cell cogeneration system according to claim 7 or 8, characterized in that, The heat system (400) is an air source heat pump, which includes an evaporator (11), a compressor (12), a heat exchanger (13), a storage tank (14), a filter (15), and an expansion valve (16). The evaporator (11), the compressor (12), the heat exchanger (13), the storage tank (14), the filter (15), and the expansion valve (16) are connected in sequence, and the expansion valve (16) is connected to the evaporator (11) to form a closed loop of working fluid circulation. The heat exchanger (13) is used to heat the cold water coming in from the user side. The evaporator (11) is connected to the hydrogen fuel cell (9) through a heat recovery module and forms the heat transfer path.

10. The hydrogen fuel cell cogeneration system according to claim 9, characterized in that, The heat recovery module includes a cooling pipe, an air preheater (19), a liquid storage tank (20), and a second pump (21). The cooling pipe is embedded inside the hydrogen fuel cell (9) or attached to the surface of the hydrogen fuel cell (9). One end of the cooling pipe passes through the air preheater (19), the liquid storage tank (20), and the second pump (21) in sequence, and is connected to the other end of the cooling pipe to form a coolant circulation channel. The coolant circulation channel is filled with coolant, which is used to absorb the heat of the hydrogen fuel cell (9) and transfer it to the air preheater (19). The air preheater (19) is connected to the evaporator (11) to transfer heat to the evaporator (11).

Images