Room-temperature solid-state hydrogen storage and supply system for small distributed power generation

Abstract

The present invention discloses a room-temperature solid-state hydrogen storage and supply system for small-scale distributed power generation, comprising a room-temperature solid-state hydrogen storage subsystem, a water circulation subsystem, and a hydrogen pipeline subsystem. The room-temperature solid-state hydrogen storage subsystem comprises a room-temperature solid-state hydrogen storage device, a hydrogen valve, a hydrogen storage temperature sensor, and an electric heating device. The water circulation subsystem comprises a water chiller, a solar water heater, a water circulation pump, and a circulating water temperature sensor. The hydrogen pipeline subsystem comprises a mass flow controller, a first pressure reducing valve, a second pressure reducing valve, an emergency hydrogen discharge valve, a safety valve, and a pressure transmitter. The water circulation pump can switchably provide circulating cold water or circulating hot water to the room-temperature solid-state hydrogen storage device through a water chiller or a solar water heater. The hydrogen pipeline subsystem can switchably perform a hydrogen absorption process or a hydrogen release process. The room-temperature solid-state hydrogen storage and supply system of the present invention is suitable for small-scale distributed power generation application scenarios with relatively stable hydrogen absorption and release flow rates, and has the advantages of high density, simple structure, low cost, and high safety.

Description

Technical Field

[0001] The present invention relates to the field of fuel cell systems, and in particular to a room-temperature solid-state hydrogen storage and supply system for small-scale distributed power generation. Background Art

[0002] Hydrogen energy is an important way to achieve my country's carbon peak and carbon neutrality goals, and the storage and supply of hydrogen is a key bottleneck limiting the application of the hydrogen energy industry. The current hydrogen storage methods are mainly high-pressure gas hydrogen, liquid hydrogen and solid hydrogen. However, both high-pressure gas hydrogen and liquid hydrogen have disadvantages such as high safety risks, low volume hydrogen storage density, and high energy consumption for pressurization / liquefaction. Liquid hydrogen also has the problem of being volatile and difficult to store for a long time, which limits the promotion of high-pressure gas hydrogen and liquid hydrogen. Solid-state hydrogen storage is a hydrogen storage technology based on solid-state hydrogen storage materials. It has the advantages of high volume hydrogen storage density, moderate operating temperature and pressure, long-term storage of hydrogen, and high safety. It is considered to be one of the main methods of hydrogen storage in the future, especially suitable for distributed power generation, on-vehicle hydrogen storage and other fields. However, since solid-state hydrogen storage materials release heat when absorbing hydrogen / absorb heat when releasing hydrogen, external cooling is required when absorbing hydrogen, and external heat supply is required when releasing hydrogen, so as to achieve rapid and controllable absorption and release of hydrogen by the hydrogen storage material. In order to reduce the comprehensive energy consumption of the hydrogen storage system, solar thermal equipment can be used to assist in providing the heat required for hydrogen release. In addition, how to measure the absorption and desorption of hydrogen in the solid-state hydrogen storage system is also a prerequisite for the application of room-temperature solid-state hydrogen storage systems in the field of distributed power generation.

[0003] Therefore, technicians in this field are committed to developing a room-temperature solid-state hydrogen storage and supply system for small-scale distributed power generation, so as to achieve rapid, low-energy consumption, and controllable hydrogen absorption and release of the solid-state hydrogen storage system. Summary of the Invention

[0004] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is how to develop a room-temperature solid-state hydrogen storage and supply system for small-scale distributed power generation, and realize controllable low-energy consumption hydrogen absorption and desorption of the room-temperature solid-state hydrogen storage and supply system.

[0005] To achieve the above-mentioned purpose, the present invention provides a room-temperature solid-state hydrogen storage and supply system for small-scale distributed power generation, comprising a room-temperature solid-state hydrogen storage subsystem, a water circulation subsystem and a hydrogen pipeline subsystem, wherein the room-temperature solid-state hydrogen storage subsystem comprises a room-temperature solid-state hydrogen storage device, a hydrogen valve, a hydrogen storage temperature sensor, and an electric heating device, the water circulation subsystem comprises a water chiller, a solar water heater, a water circulation pump, and a circulating water temperature sensor, the hydrogen pipeline subsystem comprises a mass flow controller, a first pressure reducing valve, a second pressure reducing valve, an emergency hydrogen discharge valve, a safety valve, and a pressure transmitter, the hydrogen storage temperature sensor is connected to the room-temperature solid-state hydrogen storage device, the electric heating device is arranged in the room-temperature solid-state hydrogen storage device, and the water circulation pump can switchably pass through the water chiller. The machine or the solar water heater provides circulating cold water or circulating hot water to the room-temperature solid-state hydrogen storage device, the room-temperature solid-state hydrogen storage device is connected to the hydrogen main pipe of the hydrogen pipeline subsystem through the hydrogen valve, the hydrogen main pipe is connected to the pressure transmitter, and is connected to the hydrogen discharge port in parallel through the emergency hydrogen relief valve and the safety valve. The hydrogen pipeline subsystem can switch the hydrogen in the hydrogen charging device into the hydrogen main pipe through the first pressure reducing valve and the mass flow controller, and fill it into the room-temperature solid-state hydrogen storage device through the hydrogen valve, which is a hydrogen absorption process, or the hydrogen stored in the room-temperature solid-state hydrogen storage device enters the hydrogen main pipe through the hydrogen valve, and is sent to the hydrogen supply device through the mass flow controller and the second pressure reducing valve, which is a hydrogen discharge process.

[0006] Furthermore, the room temperature solid-state hydrogen storage device is composed of one or more hydrogen storage tank units connected in parallel, and the hydrogen storage tank units are filled with one or more rare earth, titanium, and vanadium hydrogen storage alloy materials.

[0007] Furthermore, the water refrigerator uses electricity-consuming cooling.

[0008] Furthermore, the rated cooling power of the water refrigerator is not less than 0.0134F, where F is the rated hydrogen absorption rate of the room temperature solid-state hydrogen storage device, the unit of the rated cooling power of the water refrigerator is kW, and the unit of the rated hydrogen absorption rate of the room temperature solid-state hydrogen storage device is NL / min.

[0009] Furthermore, the hydrogen absorption process of the room temperature solid-state hydrogen storage and supply system includes the following steps:

[0010] Step 10: If the ambient temperature reaches the circulating cold water starting temperature, start the water refrigerator and the water circulating pump, so that the circulating cold water circulates along the water refrigerator, the water circulating pump and the room-temperature solid-state hydrogen storage device, so as to start the circulating cold water to assist in cooling the room-temperature solid-state hydrogen storage device;

[0011] Step 11, setting the reduced pressure of the first pressure reducing valve and the control flow of the mass flow controller;

[0012] Step 12: Start absorbing hydrogen, so that hydrogen flows into the room temperature solid-state hydrogen storage device along the first pressure reducing valve, the mass flow controller and the hydrogen valve in sequence;

[0013] Step 13: Determine the remaining hydrogen amount of the room temperature solid-state hydrogen storage device by integrating the instantaneous flow value of the mass flow controller over time;

[0014] The hydrogen release process of the room temperature solid-state hydrogen storage and supply system comprises the following steps:

[0015] Step 20: Start the electric heating device in the room-temperature solid-state hydrogen storage device to heat the room-temperature solid-state hydrogen storage device to a hydrogen release temperature; if the water temperature in the solar water heater reaches the circulating hot water start temperature, start the water circulation pump to allow the circulating hot water to circulate along the solar water heater, the water circulation pump, and the room-temperature solid-state hydrogen storage device, so as to start the circulating hot water to assist in heating the room-temperature solid-state hydrogen storage device; if the water temperature in the solar water heater does not reach the circulating hot water start temperature, do not start the circulating hot water;

[0016] Step 21, setting the reduced pressure of the second pressure reducing valve and the control flow of the mass flow controller;

[0017] Step 22: start releasing hydrogen, so that hydrogen flows out of the room temperature solid-state hydrogen storage device along the hydrogen valve, the mass flow controller, and the second pressure reducing valve in sequence;

[0018] Step 23: Determine the remaining hydrogen amount of the room temperature solid-state hydrogen storage device by integrating the instantaneous flow value of the mass flow controller over time.

[0019] Furthermore, the remaining hydrogen amount m of the room temperature solid state hydrogen storage device is H2 Calculated by the following formula:

[0020]

[0021] Wherein, m0 is the initial hydrogen storage capacity; v is the instantaneous flow rate, in NL / min, which is positive for the hydrogen absorption process and negative for the hydrogen release process; n is the number of hydrogen absorption / desorption cycles; t is the hydrogen absorption / desorption time, in seconds; m H2 , m0 unit is g.

[0022] Furthermore, the starting temperature of the circulating cold water is not lower than 20°C, the cooling temperature of the water refrigerator during hydrogen absorption is 5-20°C, the starting temperature of the circulating hot water is not lower than 45°C, and the heating temperature of the electric heating device during hydrogen release is 45-85°C.

[0023] Furthermore, during the hydrogen absorption process of the room temperature solid-state hydrogen storage and supply system, the pressure reduction pressure of the first pressure reducing valve is set to 0.7-1.6 MPa.

[0024] Furthermore, during the hydrogen release process of the room temperature solid-state hydrogen storage and supply system, the reduced pressure of the second pressure reducing valve is set to 0.1-0.5 MPa.

[0025] Furthermore, the water circulation subsystem further includes a water inlet valve and a water outlet valve. The water circulation subsystem is regularly replenished with circulating water flowing into it through the water inlet valve, and the circulating water flows out of it from the water outlet valve.

[0026] The room-temperature solid-state hydrogen storage and supply system of the present invention is suitable for small-scale distributed power generation application scenarios with relatively stable hydrogen absorption and desorption flow rates, and has the advantages of high density, simple structure, low cost, and high safety.

[0027] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a process flow diagram of a room temperature solid-state hydrogen storage and supply system according to a preferred embodiment of the present invention;

[0029] Figure 2 This is a process flow diagram of a room temperature solid state hydrogen storage and supply system according to another preferred embodiment of the present invention (similar to Figure 1 The same parts are not shown).

[0030] Among them, 1-normal temperature solid-state hydrogen storage tank, 2-hydrogen valve, 3-hydrogen storage temperature sensor, 4-electric heating device, 5-mass flow controller, 6-first pressure reducing valve, 7-second pressure reducing valve, 8-emergency hydrogen discharge valve, 9-safety valve, 10-third power valve, 11-fourth power valve, 12-seventh power valve, 13-eighth power valve, 14-pressure transmitter, 15-water chiller, 16-solar water heater, 17-water circulation pump, 18-fifth power valve, 19-first power valve, 20-sixth power valve, 21-second power valve, 22-water inlet valve, 23-first water outlet valve, 24-second water outlet valve, 25-circulating water temperature sensor, 1.1-first normal temperature solid-state hydrogen storage tank, 1.2-second normal temperature solid-state hydrogen storage tank, 2.1-first hydrogen valve, 2.2-second hydrogen valve, 3.1-First hydrogen storage temperature sensor, 3.2-Second hydrogen storage temperature sensor, 4.1-First electric heating device, 4.2-Second electric heating device, A1-Normal temperature solid-state hydrogen storage subsystem, A2-Water circulation subsystem, A3-Hydrogen pipeline subsystem. DETAILED DESCRIPTION

[0031] The following describes several preferred embodiments of the present invention with reference to the accompanying drawings to make its technical content clearer and easier to understand. The present invention can be embodied in many different forms of embodiments, and the scope of protection of the present invention is not limited to the embodiments mentioned herein.

[0032] In the drawings, components with identical structures are denoted by the same reference numerals, and components with similar structures or functions are denoted by similar reference numerals. The size and thickness of each component shown in the drawings are arbitrary and are not limited by the present invention. For clarity, the thickness of components in some places in the drawings is appropriately exaggerated.

[0033] The present invention provides a room-temperature solid-state hydrogen storage and supply system for small-scale distributed power generation, comprising a room-temperature solid-state hydrogen storage subsystem, a hydrogen piping subsystem, and a water circulation subsystem. During the hydrogen absorption process, circulating cold water cools the heat released by the hydrogen storage material. During the hydrogen release process, an electric heater and circulating hot water provide the required heat. A mass flow controller controls and accumulates the stored hydrogen, achieving high-efficiency and rapid hydrogen absorption and release.

[0034] Example 1

[0035] like Figure 1 As shown, this embodiment uses La-Mg-Ni alloy as the hydrogen storage material, and about 195 kg of the alloy is loaded into the room temperature solid-state hydrogen storage tank 1 to form a room temperature solid-state hydrogen storage subsystem A1. The room temperature solid-state hydrogen storage tank 1 is equipped with a hydrogen storage temperature sensor 3 and a hydrogen valve 2, and the electric heating device 4 is a 1.5 kW electric heating rod. The room temperature solid-state hydrogen storage subsystem A1 is connected to the water circulation subsystem A2 and the hydrogen pipeline subsystem A3. The water refrigerator 15 of the room temperature solid-state hydrogen storage and supply system has a power of 1 kW, and the water volume of the solar water heater 16 is 200 L. When the room temperature solid-state hydrogen storage subsystem A1 is in operation, circulating water is regularly replenished every two months. The circulating water flows into the water circulation subsystem A2 through the water inlet valve 22, and flows out of the water circulation subsystem A2 from the first water outlet valve 23 and the second water outlet valve 24.

[0036] The hydrogen absorption steps of this embodiment are:

[0037] S0: If the ambient temperature is ≥ the circulating cold water starting temperature of 20°C, the circulating cold water is started to cool to 15°C for auxiliary cooling of the room temperature solid hydrogen storage tank 1, and the water refrigerator 15 and the water circulation pump 17 are started, so that the circulating cold water circulates along the first power valve 19, the water refrigerator 15, the second power valve 21, the water circulation pump 17, and the room temperature solid hydrogen storage tank 1;

[0038] S1: Set the pressure reduction pressure of the first pressure reducing valve 6 to 1.2 MPa and the control flow rate of the mass flow controller 5 to 17 L / min;

[0039] S2: Start absorbing hydrogen, so that the hydrogen flows into the room temperature solid hydrogen storage tank 1 along the first pressure reducing valve 6, the third power valve 10, the mass flow controller 5, the fourth power valve 11, and the hydrogen valve 2 in sequence;

[0040] S3: The remaining hydrogen amount in the room temperature solid state hydrogen storage tank 1 is determined by integrating the instantaneous flow value of the mass flow controller 5 with respect to time.

[0041] The hydrogen release steps of this embodiment are:

[0042] S0: Start the electric heating device 4 in the room-temperature solid-state hydrogen storage tank 1 to heat the room-temperature solid-state hydrogen storage tank 1 to the hydrogen release temperature of 60°C; if the water temperature in the solar water heater 16 is ≥ the circulating hot water starting temperature of 50°C, start the circulating hot water to assist in heating the room-temperature solid-state hydrogen storage tank 1, and start the water circulation pump 17, so that the circulating hot water circulates along the fifth power valve 18, the solar water heater 16, the sixth power valve 20, the water circulation pump 17, and the room-temperature solid-state hydrogen storage tank 1; if the water temperature in the solar water heater 16 is < the circulating hot water starting temperature of 50°C, do not start the circulating hot water;

[0043] S1: Set the reduced pressure of the second pressure reducing valve 7 to 0.45 MPa and the control flow of the mass flow controller 5 to 37 L / min;

[0044] S2: hydrogen release begins, so that hydrogen flows out of the room temperature solid hydrogen storage tank 1 along the hydrogen valve 2, the seventh power valve 12, the mass flow controller 5, the eighth power valve 13, and the second pressure reducing valve 7 in sequence;

[0045] S4: The remaining hydrogen amount in the room temperature solid state hydrogen storage tank 1 is determined by integrating the instantaneous flow value of the mass flow controller 5 with respect to time.

[0046] The remaining hydrogen amount m in the room temperature solid hydrogen storage tank 1 H2 (Unit: g) is calculated by the following formula:

[0047]

[0048] Among them, m0 is the initial hydrogen storage capacity (unit: g), v is the instantaneous flow rate (unit: NL / min), the hydrogen absorption process is a positive value, the hydrogen desorption process is a negative value, n is the number of hydrogen absorption / desorption in a hydrogen absorption / desorption cycle, and t is the hydrogen absorption / desorption time (unit: s).

[0049] The first power valve 19 , the second power valve 21 , the third power valve 10 , the fourth power valve 11 , the fifth power valve 18 , the sixth power valve 20 , the seventh power valve 12 , and the eighth power valve 13 may be driven by electric actuators or pneumatic actuators.

[0050] A pressure transmitter 14 is provided on the hydrogen main pipe between the hydrogen pipeline subsystem A3 and the room temperature solid hydrogen storage subsystem A1. A circulating water temperature sensor 25 is provided on the inlet pipe of the water circulating pump 17.

[0051] The hydrogen main pipe between the hydrogen pipeline subsystem A3 and the room temperature solid-state hydrogen storage subsystem A1 is also provided with an emergency hydrogen discharge valve 8 and a safety valve 9 connected in parallel to the hydrogen discharge port.

[0052] Example 2

[0053] This embodiment uses La-Mg-Ni alloy as the hydrogen storage material, and uniformly fills about 195 kg of the alloy into the first room temperature solid state hydrogen storage tank 1.1 and the second room temperature solid state hydrogen storage tank 1.2, respectively, to form a room temperature solid state hydrogen storage subsystem A1. Figure 2 As shown. The first room temperature solid state hydrogen storage tank 1.1 and the second room temperature solid state hydrogen storage tank 1.2 are connected in parallel, and are respectively installed with the first hydrogen storage temperature sensor 3.1, the second hydrogen storage temperature sensor 3.2 and the first hydrogen valve 2.1, the second hydrogen valve 2.2. The first electric heating device 4.1 and the second electric heating device 4.2 are both 1.5kW electric heating rods. Based on Figure 2 The room temperature solid state hydrogen storage subsystem A1, and Figure 1 The water circulation subsystem A2 in the room-temperature solid-state hydrogen storage and supply system is connected to the hydrogen piping subsystem A3. The water chiller 15 in the room-temperature solid-state hydrogen storage and supply system has a power of 1 kW, and the solar water heater 16 has a water capacity of 200 L. During operation of the room-temperature solid-state hydrogen storage subsystem A1, circulating water is replenished regularly every two months. The circulating water flows into the water circulation subsystem A2 through the water inlet valve 22 and flows out of the water circulation subsystem A2 through the first water outlet valve 23 and the second water outlet valve 24.

[0054] The hydrogen absorption steps of this embodiment are:

[0055] S0: If the ambient temperature is ≥ the circulating cold water starting temperature of 20°C, the circulating cold water is started to cool to 15°C to assist in cooling the room temperature solid-state hydrogen storage subsystem A1, and the water chiller 15 and the water circulating pump 17 are started, so that the circulating cold water circulates along the first power valve 19, the water chiller 15, the second power valve 21, the water circulating pump 17, the first room temperature solid-state hydrogen storage tank 1.1 and the second room temperature solid-state hydrogen storage tank 1.2;

[0056] S1: Set the pressure reduction pressure of the first pressure reducing valve 6 to 1.2 MPa and the control flow rate of the mass flow controller 5 to 17 L / min;

[0057] S2: Start absorbing hydrogen, so that hydrogen flows into the room temperature solid-state hydrogen storage subsystem A1 along the first pressure reducing valve 6, the third power valve 10, the mass flow controller 5, the fourth power valve 11, the first hydrogen valve 2.1, and the second hydrogen valve 2.2 in sequence;

[0058] S3: The remaining hydrogen amount in the room temperature solid-state hydrogen storage subsystem A1 is determined by integrating the instantaneous flow value of the mass flow controller 5 with respect to time.

[0059] The hydrogen release steps of this embodiment are:

[0060] S0: Start the first electric heating device 4.1 and the second electric heating device 4.2 in the first normal temperature solid-state hydrogen storage tank 1.1 and the second normal temperature solid-state hydrogen storage tank 1.2 to heat the first normal temperature solid-state hydrogen storage tank 1.1 and the second normal temperature solid-state hydrogen storage tank 1.2 to the hydrogen release temperature of 60°C; if the water temperature in the solar water heater 16 is greater than or equal to the circulating hot water starting temperature of 50°C, start the circulating hot water to assist in heating the first normal temperature solid-state hydrogen storage tank 1.1 and the second normal temperature solid-state hydrogen storage tank 1.2, and start the water circulation pump 17 so that the circulating hot water circulates along the fifth power valve 18, the solar water heater 16, the sixth power valve 20, the water circulation pump 17, the first normal temperature solid-state hydrogen storage tank 1.1 and the second normal temperature solid-state hydrogen storage tank 1.2; if the water temperature in the solar water heater 16 is less than the circulating hot water starting temperature of 50°C, do not start the circulating hot water;

[0061] S1: Set the reduced pressure of the second pressure reducing valve 7 to 0.45 MPa and the control flow of the mass flow controller 5 to 37 L / min;

[0062] S2: Start releasing hydrogen, so that hydrogen flows out of the room temperature solid-state hydrogen storage subsystem A1 along the first hydrogen valve 2.1, the second hydrogen valve 2.2, the seventh power valve 12, the mass flow controller 5, the eighth power valve 13, and the second pressure reducing valve 7 in sequence;

[0063] S4: The remaining hydrogen amount in the room temperature solid state hydrogen storage subsystem A1 is determined by integrating the instantaneous flow value of the mass flow controller 5 with respect to time.

[0064] The remaining hydrogen amount m of the room temperature solid-state hydrogen storage and supply system A1 H2 (Unit: g) is calculated by the following formula:

[0065]

[0066] Among them, m0 is the initial hydrogen storage capacity (unit: g), v is the instantaneous flow rate (unit: NL / min), the hydrogen absorption process is a positive value, the hydrogen desorption process is a negative value, n is the number of hydrogen absorption / desorption in a hydrogen absorption / desorption cycle, and t is the hydrogen absorption / desorption time (unit: s).

[0067] The first power valve 19 , the second power valve 21 , the third power valve 10 , the fourth power valve 11 , the fifth power valve 18 , the sixth power valve 20 , the seventh power valve 12 , and the eighth power valve 13 may be driven by electric actuators or pneumatic actuators.

[0068] A pressure transmitter 14 is provided on the hydrogen main pipe between the hydrogen pipeline subsystem A3 and the room temperature solid hydrogen storage subsystem A1. A circulating water temperature sensor 25 is provided on the inlet pipe of the water circulating pump 17.

[0069] The hydrogen main pipe between the hydrogen pipeline subsystem A3 and the room temperature solid-state hydrogen storage subsystem A1 is also provided with an emergency hydrogen discharge valve 8 and a safety valve 9 connected in parallel to the hydrogen discharge port.

[0070] The preferred embodiments of the present invention have been described in detail above. It should be understood that numerous modifications and variations based on the concepts of the present invention are possible without inventive effort by those skilled in the art. Therefore, any technical solution that can be derived by one skilled in the art through logical analysis, reasoning, or limited experimentation based on the concepts of the present invention and the prior art should be within the scope of protection defined by the claims.

Claims

1. A room temperature solid-state hydrogen storage and supply system for small distributed power generation, characterized in that: It includes a room temperature solid-state hydrogen storage subsystem, a water circulation subsystem and a hydrogen pipeline subsystem, wherein the room temperature solid-state hydrogen storage subsystem includes a room temperature solid-state hydrogen storage device, a hydrogen valve, a hydrogen storage temperature sensor, and an electric heating device. The water circulation subsystem includes a water chiller, a solar water heater, a water circulation pump, and a circulating water temperature sensor. The hydrogen pipeline subsystem includes a mass flow controller, a first pressure reducing valve, a second pressure reducing valve, an emergency hydrogen discharge valve, a safety valve, and a pressure transmitter. The hydrogen storage temperature sensor is connected to the room temperature solid-state hydrogen storage device. The electric heating device is arranged in the room temperature solid-state hydrogen storage device. The water circulation pump can switchably provide circulating cold water or circulating water through the water chiller or the solar water heater. Circulating hot water to the room-temperature solid-state hydrogen storage device, the room-temperature solid-state hydrogen storage device is connected to the hydrogen main pipe of the hydrogen pipeline subsystem through the hydrogen valve, the hydrogen main pipe is connected to the pressure transmitter, and is connected in parallel to the hydrogen discharge port through the emergency hydrogen relief valve and the safety valve, the hydrogen pipeline subsystem can switchably allow the hydrogen in the hydrogen charging device to enter the hydrogen main pipe through the first pressure reducing valve and the mass flow controller, and be charged into the room-temperature solid-state hydrogen storage device through the hydrogen valve, which is a hydrogen absorption process, or allow the hydrogen stored in the room-temperature solid-state hydrogen storage device to enter the hydrogen main pipe through the hydrogen valve, and be sent to the hydrogen supply device through the mass flow controller and the second pressure reducing valve, which is a hydrogen discharge process; in, The hydrogen absorption process of the room temperature solid-state hydrogen storage and supply system comprises the following steps: Step 10: If the ambient temperature reaches the circulating cold water starting temperature, start the water refrigerator and the water circulating pump, so that the circulating cold water circulates along the water refrigerator, the water circulating pump and the room-temperature solid-state hydrogen storage device, so as to start the circulating cold water to assist in cooling the room-temperature solid-state hydrogen storage device; Step 11, setting the reduced pressure of the first pressure reducing valve and the control flow of the mass flow controller; Step 12: Start absorbing hydrogen, so that hydrogen flows into the room temperature solid-state hydrogen storage device along the first pressure reducing valve, the mass flow controller and the hydrogen valve in sequence; Step 13: Determine the remaining hydrogen amount of the room temperature solid-state hydrogen storage device by integrating the instantaneous flow value of the mass flow controller over time; The hydrogen release process of the room temperature solid-state hydrogen storage and supply system comprises the following steps: Step 20: Start the electric heating device in the room-temperature solid-state hydrogen storage device to heat the room-temperature solid-state hydrogen storage device to a hydrogen release temperature; if the water temperature in the solar water heater reaches the circulating hot water start temperature, start the water circulation pump to allow the circulating hot water to circulate along the solar water heater, the water circulation pump, and the room-temperature solid-state hydrogen storage device, so as to start the circulating hot water to assist in heating the room-temperature solid-state hydrogen storage device; if the water temperature in the solar water heater does not reach the circulating hot water start temperature, do not start the circulating hot water; Step 21, setting the reduced pressure of the second pressure reducing valve and the control flow of the mass flow controller; Step 22: start releasing hydrogen, so that hydrogen flows out of the room temperature solid-state hydrogen storage device along the hydrogen valve, the mass flow controller, and the second pressure reducing valve in sequence; Step 23: Determine the remaining hydrogen amount of the room temperature solid-state hydrogen storage device by integrating the instantaneous flow value of the mass flow controller over time.

2. The room temperature solid-state hydrogen storage and supply system for small-scale distributed power generation according to claim 1, characterized in that: The room temperature solid-state hydrogen storage device is composed of one or more hydrogen storage tank units connected in parallel, and the hydrogen storage tank units are filled with one or more rare earth, titanium, and vanadium hydrogen storage alloy materials.

3. The room temperature solid-state hydrogen storage and supply system for small-scale distributed power generation according to claim 1, characterized in that: The water refrigerator uses electricity-consuming refrigeration.

4. The room temperature solid-state hydrogen storage and supply system for small-scale distributed power generation according to claim 3, characterized in that: The rated cooling power of the water chiller is not less than 0.0134 F ,in F is the rated hydrogen absorption rate of the room-temperature solid-state hydrogen storage device, the unit of the rated cooling power of the water refrigerator is kW, and the unit of the rated hydrogen absorption rate of the room-temperature solid-state hydrogen storage device is NL / min.

5. The room temperature solid-state hydrogen storage and supply system for small-scale distributed power generation according to claim 1, characterized in that: The remaining hydrogen amount m of the room temperature solid-state hydrogen storage device H2 Calculated by the following formula: Wherein, m0 is the initial hydrogen storage capacity; v is the instantaneous flow rate, in NL / min, which is positive for the hydrogen absorption process and negative for the hydrogen release process; n is the number of hydrogen absorption / desorption cycles; t is the hydrogen absorption / desorption time, in seconds; m H2 , m0 unit is g.

6. The room temperature solid-state hydrogen storage and supply system for small-scale distributed power generation according to claim 1, characterized in that: The starting temperature of the circulating cold water is not lower than 20°C, the cooling temperature of the water refrigerator during hydrogen absorption is 5~20°C, the starting temperature of the circulating hot water is not lower than 45°C, and the heating temperature of the electric heating device during hydrogen release is 45~85°C.

7. The room temperature solid-state hydrogen storage and supply system for small-scale distributed power generation according to claim 1, characterized in that: During the hydrogen absorption process of the room temperature solid-state hydrogen storage and supply system, the pressure reduction pressure of the first pressure reducing valve is set to 0.7-1.6 MPa.

8. The room temperature solid-state hydrogen storage and supply system for small-scale distributed power generation according to claim 1, characterized in that: During the hydrogen release process of the room temperature solid-state hydrogen storage and supply system, the reduced pressure of the second pressure reducing valve is set to 0.1-0.5 MPa.

9. The room temperature solid-state hydrogen storage and supply system for small-scale distributed power generation according to claim 1, characterized in that: The water circulation subsystem further comprises a water inlet valve and a water outlet valve. The water circulation subsystem is regularly replenished with circulating water flowing in through the water inlet valve and the circulating water flows out from the water outlet valve.

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