Hydrogen storage and supply system for wind and light power generation

Abstract

The hydrogen storage and supply system comprises a hydrogen supply module, the hydrogen supply module is connected with a first connector of a first three-way valve through a first pipe set, and a second connector of the first three-way valve is connected with a first solid hydrogen storage module through a second pipe set; a third interface of the first three-way valve is connected with the second solid hydrogen storage module through a third pipe group; the second pipe group is connected with a first interface of a second three-way valve through a fourth pipe group; the third pipe set is connected with a second connector of the second three-way valve through a fifth pipe set. A third interface of the second three-way valve is connected with the hydrogen using module through a sixth pipe group; the first solid hydrogen storage module and the second solid hydrogen storage module are connected with a heat-conducting medium inlet of the energy storage heat exchange module through a first heat exchange main pipe, and the first solid hydrogen storage module and the second solid hydrogen storage module are connected with a heat-conducting medium outlet of the energy storage heat exchange module through a second heat exchange main pipe. Efficient storage and stable supply of hydrogen can be achieved, and the energy utilization rate is high.

Description

Technical Field

[0001] The present invention relates to the technical field of renewable energy, and in particular to a hydrogen storage and supply system for wind and solar power generation. Background Art

[0002] With the development of technology in the field of renewable energy, water electrolysis technology for hydrogen production has emerged. This technology uses renewable energy such as wind and solar energy as its power source. It is clean, sustainable and can convert intermittent electrical energy into chemical energy for storage.

[0003] In the prior art, spherical tanks or high-pressure gas cylinders are often used to store hydrogen at the back end of a large-scale wind-solar power generation-water electrolysis hydrogen production system.

[0004] However, the above-mentioned hydrogen storage method has the problems of large footprint, difficulty in simultaneously satisfying the hydrogen absorption and release states, and low safety. At the same time, the instability of wind and solar power generation directly affects the efficiency and output of hydrogen production by water electrolysis, making it difficult to provide stable hydrogen input for the back-end hydrogen storage system, further increasing the difficulty of hydrogen energy storage, transportation and utilization. Summary of the invention

[0005] Based on this, it is necessary to provide a hydrogen storage and supply system for wind and solar power generation to address the problems in the existing technology that the unstable hydrogen source is difficult to provide stable hydrogen input for the back-end hydrogen storage system, resulting in low hydrogen storage efficiency, poor safety and stability, and single function of the hydrogen storage system.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A hydrogen storage and supply system for wind and solar power generation, comprising a hydrogen supply module, wherein a hydrogen discharge port of the hydrogen supply module is connected to a first interface of a first three-way valve through a first pipe group, a second interface of the first three-way valve is connected to a gas port of a first solid-state hydrogen storage module through a second pipe group, and a third interface of the first three-way valve is connected to a gas port of a second solid-state hydrogen storage module through a third pipe group;

[0008] A fourth pipe group is installed on the second pipe group, and an end of the fourth pipe group is connected to the first interface of the second three-way valve;

[0009] The third pipe group is matched with a fifth pipe group, and the end of the fifth pipe group is connected to the second interface of the second three-way valve;

[0010] The third interface of the second three-way valve is connected to the hydrogen inlet of the hydrogen module through the sixth pipe group;

[0011] The hydrogen supply module sequentially provides hydrogen to the first solid-state hydrogen storage module through the first tube group and the second tube group, and the hydrogen supply module sequentially provides hydrogen to the second solid-state hydrogen storage module through the first tube group and the third tube group;

[0012] The hydrogen released by the first solid-state hydrogen storage module sequentially passes through the second tube group, the fourth tube group, and the sixth tube group to provide hydrogen for the hydrogen-using module, and the hydrogen released by the second solid-state hydrogen storage module sequentially passes through the third tube group, the fifth tube group, and the sixth tube group to provide hydrogen for the hydrogen-using module;

[0013] The heat transfer medium outlet of the first solid-state hydrogen storage module and the heat transfer medium outlet of the second solid-state hydrogen storage module are respectively connected to the first heat exchange main pipe, the end of the first heat exchange main pipe is connected to the heat transfer medium inlet of the energy storage heat exchange module, the heat transfer medium inlet of the first solid-state hydrogen storage module and the heat transfer medium inlet of the second solid-state hydrogen storage module are respectively connected to the second heat exchange main pipe, and the end of the second heat exchange main pipe is connected to the heat transfer medium outlet of the energy storage heat exchange module;

[0014] The interior of the energy storage and heat exchange module is filled with phase change material, and the heat released when the first solid-state hydrogen storage module absorbs hydrogen and the heat released when the second solid-state hydrogen storage module absorbs hydrogen are respectively transferred to the energy storage and heat exchange module through a heat conductive medium, so that the phase change material performs phase change energy storage, and then the phase change material is used to supply heat when the first solid-state hydrogen storage module or the second solid-state hydrogen storage module releases hydrogen.

[0015] As a further improvement of the above technical solution:

[0016] The first solid-state hydrogen storage module includes several first hydrogen storage tanks, the interior of a single first hydrogen storage tank is filled with metal hydride hydrogen storage material, the gas port of the single first hydrogen storage tank is connected to the second pipe group through a first connecting branch pipe, the heat transfer medium outlet of the single first hydrogen storage tank is connected to the first heat exchange main pipe through a second connecting branch pipe, and the heat transfer medium inlet of the single first hydrogen storage tank is connected to the second heat exchange main pipe through a third connecting branch pipe.

[0017] The second solid-state hydrogen storage module includes a plurality of second hydrogen storage tanks connected in parallel, and a single second hydrogen storage tank is filled with metal hydride hydrogen storage material.

[0018] The energy storage and heat exchange module includes an energy storage tank, wherein a serpentine heat exchange tube is installed inside the energy storage tank, and a phase change material is filled between the outer wall surface of the heat exchange tube and the inner wall surface of the energy storage tank.

[0019] The hydrogen module comprises a cooler and a buffer tank which are connected in series in sequence, and a hydrogen outlet of the buffer tank is connected to a hydrogen inlet of a hydrogen consuming device through a hydrogen supply pipe group.

[0020] The hydrogen consuming equipment adopts a hydrogen internal combustion engine or a hydrogen fuel cell.

[0021] The exhaust gas exhaust port of the hydrogen internal combustion engine or the exhaust gas exhaust port of the hydrogen fuel cell is connected to the first heat exchange inlet of the plate heat exchanger through the exhaust gas intake pipe group, the first heat exchange outlet of the plate heat exchanger is installed with the exhaust gas exhaust pipe group, the second heat exchange outlet of the plate heat exchanger is connected to the first heat exchange main pipe through the first heat exchange pipe group, and the second heat exchange inlet of the plate heat exchanger is connected to the second heat exchange main pipe through the second heat exchange pipe group.

[0022] The auxiliary heat exchange module includes an oil tank, a heat transfer medium inlet of the oil tank is connected to a heat transfer medium outlet of the cooling device through a first connecting pipe group, a heat transfer medium inlet of the cooling device is connected to a heat transfer medium outlet of the oil tank through a second connecting pipe group, the first connecting pipe group is connected to a first heat exchange main pipe through a first bypass branch pipe, and the second connecting pipe group is connected to the first heat exchange main pipe through a second bypass branch pipe;

[0023] An electric heater is installed on the outside of the oil tank, and the electric heater heats the heat-conducting medium in the oil tank.

[0024] A replenishing port for replenishing the heat-conducting medium is arranged on the wall surface of the oil tank.

[0025] The second heat exchange main pipe is equipped with a circulation pump.

[0026] The beneficial effects of the present invention are as follows:

[0027] The present invention has a compact and reasonable structure and is easy to operate. By arranging a first solid-state hydrogen storage module, a second solid-state hydrogen storage module and an energy storage and heat exchange module, the hydrogen input by the hydrogen supply module can be efficiently stored, and the heat released by the hydrogen absorbed by the solid-state hydrogen storage module can be stored through the energy storage and heat exchange module. At the same time, this part of the heat can provide heat for the solid-state hydrogen storage module when it releases hydrogen, thereby saving energy and reducing system maintenance costs. In addition, the first solid-state hydrogen storage module and the second solid-state hydrogen storage module can respectively and independently stably transport hydrogen to the hydrogen using module, realizing integrated hydrogen storage and supply.

[0028] The hydrogen storage and supply system for wind and solar power generation of the present invention has a high system integration. By combining two solid-state hydrogen storage modules in parallel, the hydrogen absorption and release states of the solid-state hydrogen storage modules can be effectively controlled, and the two solid-state hydrogen storage modules can absorb or release hydrogen at the same time. The hydrogen storage efficiency is high, the safety and stability are good, and the cost is low. In addition, the high-temperature exhaust gas generated by the hydrogen internal combustion engine or the hydrogen fuel cell can be utilized to further reduce the energy consumption of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the structure of the present invention.

[0030] Figure 2 It is a schematic diagram of an embodiment of the present invention.

[0031] Figure 3 It is a structural schematic diagram of an embodiment of the present invention.

[0032] Figure 4 FIG. 4 is a schematic diagram of another embodiment of the present invention.

[0033] Figure 5 It is a schematic structural diagram of another embodiment of the present invention.

[0034] Among them: 1. First solid-state hydrogen storage module; 2. Second solid-state hydrogen storage module; 3. Hydrogen supply module; 4. Safety valve; 5. Energy storage heat exchange module; 6. Hydrogen use module; 7. Circulation pump; 8. Auxiliary heat exchange module; 9. First three-way valve; 10. Second three-way valve; 11. First pipe group; 12. Second pipe group; 13. Third pipe group; 14. Fourth pipe group; 15. Fifth pipe group; 16. Sixth pipe group; 17. Oil-gas separator; 18. First heat exchange main pipe; 19. Second heat exchange main pipe;

[0035] 101, first connecting branch pipe; 102, second connecting branch pipe; 103, third connecting branch pipe; 104, first hydrogen storage tank;

[0036] 201, second hydrogen storage tank; 202, fourth connecting branch pipe; 203, fifth connecting branch pipe; 204, sixth connecting branch pipe;

[0037] 301. Unstable hydrogen source;

[0038] 501, energy storage tank; 502, heat exchange tube; 503, insulation layer;

[0039] 601, hydrogen internal combustion engine; 602, hydrogen fuel cell; 603, low-pressure hydrogen output terminal; 604, high-pressure hydrogen output terminal; 605, buffer tank; 606, booster assembly; 607, filter; 608, cooler; 609, plate heat exchanger; 610, exhaust gas intake pipe group; 611, first heat exchange pipe group; 612, second heat exchange pipe group; 613, exhaust gas exhaust pipe group; 614, exhaust gas treatment device;

[0040] 801. Electric heater; 802. Oil tank; 803. Cooling device; 804. Refilling port; 805. First connecting pipe group; 806. Second connecting pipe group; 807. First bypass branch pipe; 808. Second bypass branch pipe. DETAILED DESCRIPTION

[0041] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0042] The structure and function of the present invention are as follows:

[0043] like Figure 1-Figure 5As shown, a hydrogen storage and supply system for wind-solar power generation includes a hydrogen supply module 3, a hydrogen discharge port of the hydrogen supply module 3 is connected to a first interface of a first three-way valve 9 through a first pipe group 11, a second interface of the first three-way valve 9 is connected to a gas port of a first solid-state hydrogen storage module 1 through a second pipe group 12, and a third interface of the first three-way valve 9 is connected to a gas port of a second solid-state hydrogen storage module 2 through a third pipe group 13; a fourth pipe group 14 is installed on the second pipe group 12, and an end of the fourth pipe group 14 is connected to a first interface of the second three-way valve 10; the third The fifth tube group 15 is installed on the tube group 13, and the end of the fifth tube group 15 is connected to the second interface of the second three-way valve 10; the third interface of the second three-way valve 10 is connected to the hydrogen inlet of the hydrogen module 6 through the sixth tube group 16; the hydrogen supply module 3 sequentially provides hydrogen to the first solid-state hydrogen storage module 1 through the first tube group 11 and the second tube group 12, and the hydrogen supply module 3 sequentially provides hydrogen to the second solid-state hydrogen storage module 2 through the first tube group 11 and the third tube group 13; the hydrogen released by the first solid-state hydrogen storage module 1 is sequentially passed through the second tube group 12, The fourth tube group 14 and the sixth tube group 16 provide hydrogen for the hydrogen module 6, and the hydrogen released by the second solid-state hydrogen storage module 2 sequentially passes through the third tube group 13, the fifth tube group 15, and the sixth tube group 16 to provide hydrogen for the hydrogen module 6; the heat transfer medium outlet of the first solid-state hydrogen storage module 1 and the heat transfer medium outlet of the second solid-state hydrogen storage module 2 are respectively connected to the first heat exchange main pipe 18, and the end of the first heat exchange main pipe 18 is connected to the heat transfer medium inlet of the energy storage heat exchange module 5, and the heat transfer medium inlet of the first solid-state hydrogen storage module 1 is connected to the heat transfer medium inlet of the second solid-state hydrogen storage module 2 are respectively connected to the second heat exchange main pipe 19, and the end of the second heat exchange main pipe 19 is connected to the heat conduction medium outlet of the energy storage heat exchange module 5; the interior of the energy storage heat exchange module 5 is filled with phase change material, and the heat released when the first solid-state hydrogen storage module 1 absorbs hydrogen and the heat released when the second solid-state hydrogen storage module 2 absorbs hydrogen are respectively transferred to the energy storage heat exchange module 5 through the heat conduction medium, so that the phase change material performs phase change energy storage, and then the phase change material is used to supply heat when the first solid-state hydrogen storage module 1 releases hydrogen or the second solid-state hydrogen storage module 2 releases hydrogen. The present application can efficiently store the hydrogen input by the hydrogen supply module 3 by providing a first solid-state hydrogen storage module 1, a second solid-state hydrogen storage module 2 and an energy storage and heat exchange module 5, and can store the heat released by the solid-state hydrogen storage module absorbing hydrogen through the energy storage and heat exchange module 5. At the same time, this part of the heat can provide heat for the solid-state hydrogen storage module when it releases hydrogen, thereby saving energy and reducing system maintenance costs; in addition, the first solid-state hydrogen storage module 1 and the second solid-state hydrogen storage module 2 can respectively and independently stably transport hydrogen to the hydrogen using module 6, realizing integrated hydrogen storage and supply.

[0044] The present application adopts heat transfer oil as the heat transfer medium, which has high heat transfer efficiency and good heat transfer effect, and can conveniently and accurately control the hydrogen absorption and desorption speed of the solid-state hydrogen storage module through temperature changes.

[0045] It also includes an auxiliary heat exchange module 8, which includes an oil tank 802, the heat transfer medium inlet of the oil tank 802 is connected to the heat transfer medium outlet of the cooling device 803 through the first connecting pipe group 805, the heat transfer medium inlet of the cooling device 803 is connected to the heat transfer medium outlet of the oil tank 802 through the second connecting pipe group 806, the first connecting pipe group 805 is connected to the first heat transfer main pipe 18 through the first bypass branch pipe 807, and the second connecting pipe group 806 is connected to the first heat transfer main pipe 18 through the second bypass branch pipe 808; the outside of the oil tank 802 is equipped with an electric heater 801, and the electric heater 801 heats the heat transfer medium in the oil tank 802. By setting the electric heater 801, heat can be provided to the system when the system is started or the energy is insufficient; by setting the cooling device 803, it can avoid the internal temperature of the heat transfer oil in the system from being too high and difficult to dissipate heat in time, effectively ensuring the safety and stability of the system.

[0046] A replenishing port 804 for replenishing the heat transfer medium is provided on the wall of the oil tank 802. The replenishing port 804 is connected to an external pipeline, and the heat transfer oil can be replenished to the system in time through the replenishing port 804 to avoid the loss of the heat transfer oil affecting the heat transfer efficiency.

[0047] The second heat exchange main pipe 19 is equipped with a circulation pump 7. The circulation pump 7 is used to drive the heat transfer medium to circulate between the first solid hydrogen storage module 1, the second solid hydrogen storage module 2, and the energy storage heat exchange module 5, so as to perform heat transfer.

[0048] In the present application, the hydrogen supply module 3 adopts a wind-solar power generation-water electrolysis hydrogen production system, that is, an unstable hydrogen source 301, which intermittently provides hydrogen to the hydrogen storage and supply system, and the hydrogen flow rate is unstable; the hydrogen storage and supply system of the present application can stably store the hydrogen provided by the unstable hydrogen source 301, and release hydrogen continuously and stably when the hydrogen module 6 needs to use it.

[0049] The first solid-state hydrogen storage module 1 includes a plurality of first hydrogen storage tanks 104, the interior of a single first hydrogen storage tank 104 is filled with a metal hydride hydrogen storage material, the gas port of the single first hydrogen storage tank 104 is connected to the second pipe group 12 through the first connecting branch pipe 101, the heat transfer medium outlet of the single first hydrogen storage tank 104 is connected to the first heat exchange main pipe 18 through the second connecting branch pipe 102, and the heat transfer medium inlet of the single first hydrogen storage tank 104 is connected to the second heat exchange main pipe 19 through the third connecting branch pipe 103. In the present application, the plurality of first hydrogen storage tanks 104 in the first solid-state hydrogen storage module 1 are connected in parallel, and the plurality of first hydrogen storage tanks 104 are independently supplied with hydrogen through the hydrogen supply module 3, and each first hydrogen storage tank 104 can independently supply hydrogen to the hydrogen using module 6.

[0050] The second solid-state hydrogen storage module 2 includes a plurality of second hydrogen storage tanks 201 connected in parallel, and a metal hydride hydrogen storage material is filled inside a single second hydrogen storage tank 201. In the present application, the structure of the second solid-state hydrogen storage module 2 is the same as that of the first solid-state hydrogen storage module 1. Similarly, the gas port of the single second hydrogen storage tank 201 is connected to the third pipe group 13 through the fourth connecting branch pipe 202, the heat transfer medium outlet of the single second hydrogen storage tank 201 is connected to the first heat exchange main pipe 18 through the fifth connecting branch pipe 203, and the heat transfer medium inlet of the single second hydrogen storage tank 201 is connected to the second heat exchange main pipe 19 through the sixth connecting branch pipe 204.

[0051] The gas port of the first hydrogen storage tank 104 and the gas port of the second hydrogen storage tank 201 are openings for hydrogen to flow in or out.

[0052] In the present application, the metal hydride hydrogen storage material adopts magnesium hydride, which releases heat when absorbing hydrogen and absorbs heat when releasing hydrogen, and has high hydrogen storage efficiency, good hydrogen storage stability and safety.

[0053] The energy storage heat exchange module 5 includes an energy storage tank 501, in which a serpentine heat exchange tube 502 is installed, and a phase change material is filled between the outer wall of the heat exchange tube 502 and the inner wall of the energy storage tank 501. The outside of the energy storage tank 501 is wrapped with an insulation layer 503.

[0054] When the phase change material is heated to the melting temperature, it undergoes a phase change (melting) from solid to liquid. During the melting process, the phase change material absorbs and stores a large amount of latent heat. When the phase change material is cooled, it needs to dissipate the stored heat in order to maintain a stable temperature, thus producing a reverse phase change from liquid to solid. In these two phase change processes, the physical state of the phase change material changes, and the temperature of the phase change material itself remains almost unchanged before the phase change is completed, thus forming a wide temperature platform, accompanied by the absorption or release of a large amount of heat.

[0055] The hydrogen module 6 includes a cooler 608 and a buffer tank 605 which are connected in series. The hydrogen outlet of the buffer tank 605 is connected to the hydrogen inlet of the hydrogen consuming equipment through a hydrogen supply pipe group. A filter 607 is also arranged between the cooler 608 and the buffer tank 605.

[0056] like Figure 2 As shown, the output end of the hydrogen module 6 of the present application can be respectively provided with a low-pressure hydrogen output end 603 and a high-pressure hydrogen output end 604, the low-pressure hydrogen output end 603 outputs hydrogen at normal pressure, and a boosting component 606 is arranged between the low-pressure hydrogen output end 603 and the high-pressure hydrogen output end 604, so as to provide high-pressure hydrogen to the hydrogen-consuming equipment through the high-pressure hydrogen output end 604.

[0057] like Figure 3As shown, in one embodiment of the present application, a safety valve 4 is installed on the connecting pipe group between the unstable hydrogen source 301 and the first solid-state hydrogen storage module 1 and the second solid-state hydrogen storage module 2, as well as on the connecting pipe group between the hydrogen module 6 and the first solid-state hydrogen storage module 1 and the second solid-state hydrogen storage module 2 to avoid excessive pressure in the pipeline and improve system safety; an oil-gas separator 17 is installed on the first heat exchange main pipe 18 to remove excess gas in the heat exchange pipeline and improve system safety performance.

[0058] like Figure 4-Figure 5 As shown, in one embodiment of the present application, the hydrogen-consuming equipment adopts a hydrogen internal combustion engine 601 or a hydrogen fuel cell 602; at this time, the exhaust gas outlet of the hydrogen internal combustion engine 601 or the exhaust gas outlet of the hydrogen fuel cell 602 is connected to the first heat exchange inlet of the plate heat exchanger 609 through the exhaust gas inlet pipe group 610, the first heat exchange outlet of the plate heat exchanger 609 is installed with an exhaust gas exhaust pipe group 613, the second heat exchange outlet of the plate heat exchanger 609 is connected to the first heat exchange main pipe 18 through the first heat exchange pipe group 611, and the second heat exchange inlet of the plate heat exchanger 609 is connected to the second heat exchange main pipe 19 through the second heat exchange pipe group 612. The heat in the high-temperature exhaust gas discharged by the hydrogen internal combustion engine 601 or the hydrogen fuel cell 602 can be stored through the energy storage heat exchange module 5, thereby further improving the energy utilization rate and reducing energy consumption. The exhaust gas exhaust pipe group 613 is equipped with an exhaust gas treatment device 614, which is used to remove nitrogen oxides from the exhaust gas after heat exchange to meet the emission standards.

[0059] In the present application, each pipeline can be in the form of several short pipes or long pipes according to the specific usage requirements and installation requirements; each pipeline is installed with a corresponding control valve assembly, which is configured according to the actual production requirements; in addition, the system is also installed with flow meters, pressure gauges, temperature gauges and other monitoring equipment to ensure safe and stable operation of the system.

[0060] The working process of the present invention is as follows:

[0061] The hydrogen storage and supply system of this application includes the following working states:

[0062] (1) Only the first solid-state hydrogen storage module 1 absorbs hydrogen, or only the second solid-state hydrogen storage module 2 absorbs hydrogen;

[0063] In this state, when the first solid-state hydrogen storage module 1 absorbs hydrogen alone, the first interface and the second interface of the first three-way valve 9 are connected, so that hydrogen is input into the first solid-state hydrogen storage module 1 through the hydrogen supply module 3, and the input hydrogen enters the corresponding first hydrogen storage tank 104 through the first connecting branch pipe 101, and the metal hydride hydrogen storage material reacts chemically with the hydrogen, thereby absorbing the hydrogen;

[0064] For a single first hydrogen storage tank 104, the heat released by the absorption of hydrogen causes the heat-conducting medium in its jacket to be stably heated. The heated heat-conducting medium enters the heat exchange tube 502 of the energy storage heat exchange module 5 through the corresponding second connecting branch pipe 102 and the first heat exchange main pipe 18 in turn, causing the phase change material to melt, thereby reducing the temperature of the heat-conducting medium flowing out of the heat exchange tube 502. The cooled heat-conducting medium flows back to the jacket on the outer wall of the corresponding first hydrogen storage tank 104 through the second heat exchange main pipe 19 and the third connecting branch pipe 103 in turn, forming a cycle until the hydrogen absorption is completed.

[0065] The hydrogen absorption process of the second solid-state hydrogen storage module 2 is similar to that of the first solid-state hydrogen storage module 1 , and will not be described in detail here.

[0066] (2) Only the first solid-state hydrogen storage module 1 releases hydrogen, or only the second solid-state hydrogen storage module 2 releases hydrogen;

[0067] In this state, when the first solid-state hydrogen storage module 1 releases hydrogen alone, the first interface and the third interface of the second three-way valve 10 are connected. At the hydrogen release temperature, due to the pressure change inside the first hydrogen storage tank 104, the first solid-state hydrogen storage module 1 releases hydrogen, and the released hydrogen enters the hydrogen using module 6 through the corresponding first connecting branch pipe 101, the second pipe group 12, and the sixth pipe group 16 in sequence;

[0068] At the same time, the heat-conducting medium in the jacket of the corresponding first hydrogen storage tank 104 enters the heat exchange tube 502 of the energy storage heat exchange module 5 through the corresponding second connecting branch pipe 102 and the first heat exchange main pipe 18 in turn, and the phase change material releases heat, so that the heat-conducting medium in the heat exchange tube 502 is stabilized at the hydrogen release temperature. The heated heat-conducting medium flows back to the jacket on the outer wall of the corresponding first hydrogen storage tank 104 through the second heat exchange main pipe 19 and the third connecting branch pipe 103 in turn, forming a cycle until the hydrogen release is completed.

[0069] The hydrogen release process of the second solid-state hydrogen storage module 2 is similar to the hydrogen release process of the first solid-state hydrogen storage module 1 , and will not be described in detail here.

[0070] (3) the first solid-state hydrogen storage module 1 absorbs hydrogen while the second solid-state hydrogen storage module 2 releases hydrogen, or the first solid-state hydrogen storage module 1 releases hydrogen while the second solid-state hydrogen storage module 2 absorbs hydrogen;

[0071] In this state, when the first solid-state hydrogen storage module 1 absorbs hydrogen and the second solid-state hydrogen storage module 2 releases hydrogen, the first interface and the second interface of the first three-way valve 9 are connected, and the hydrogen supply module 3 enters the corresponding first hydrogen storage tank 104 through the first pipe group 11, the second pipe group 12, and the corresponding first connecting branch pipe 101 in sequence, and absorbs hydrogen through the metal hydride hydrogen storage material inside the first hydrogen storage tank 104;

[0072] The second interface and the third interface of the second three-way valve 10 are connected. At the hydrogen release temperature, due to the pressure change inside the second hydrogen storage tank 201, the second solid hydrogen storage module 2 releases hydrogen. The released hydrogen enters the hydrogen using module 6 through the corresponding fourth connecting branch pipe 202, the third pipe group 13, and the sixth pipe group 16 in sequence.

[0073] At the same time, the heat transfer medium in the first solid-state hydrogen storage module 1 flows into the first heat exchange main pipe 18 through the corresponding second connecting branch pipe 102, and the heat transfer medium in the second solid-state hydrogen storage module 2 enters the first heat exchange main pipe 18 through the corresponding fifth connecting branch pipe 203, and then flows into the energy storage heat exchange module 5 through the first heat exchange main pipe 18, so that the phase change material therein undergoes a phase change (so that the temperature of the heat transfer medium is stabilized at about 320° C.), and the heat transfer medium after the temperature is stabilized flows into the second heat exchange main pipe 19, and enters the first solid-state hydrogen storage module 1 through the corresponding third connecting branch pipe 103, and enters the second solid-state hydrogen storage module 2 through the corresponding sixth connecting branch pipe 204;

[0074] In this process, the auxiliary heat exchange module 8 provides additional cooling or heating for the heat transfer medium, thereby ensuring stable operation of the system.

[0075] The process in which the first solid-state hydrogen storage module 1 releases hydrogen while the second solid-state hydrogen storage module 2 absorbs hydrogen is similar to the above process and will not be described in detail here.

[0076] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. A hydrogen storage and supply system for wind and solar power generation, characterized by: It comprises a hydrogen supply module (3), wherein the hydrogen discharge port of the hydrogen supply module (3) is connected to the first interface of the first three-way valve (9) through a first pipe group (11), the second interface of the first three-way valve (9) is connected to the gas port of the first solid-state hydrogen storage module (1) through a second pipe group (12), and the third interface of the first three-way valve (9) is connected to the gas port of the second solid-state hydrogen storage module (2) through a third pipe group (13); A fourth tube group (14) is mounted on the second tube group (12), and an end of the fourth tube group (14) is connected to a first interface of the second three-way valve (10); The third tube group (13) is matched with a fifth tube group (15) mounted thereon, and the end of the fifth tube group (15) is connected to the second interface of the second three-way valve (10); The third interface of the second three-way valve (10) is connected to the hydrogen inlet of the hydrogen module (6) through a sixth pipe group (16); The hydrogen supply module (3) sequentially supplies hydrogen to the first solid-state hydrogen storage module (1) through the first tube group (11) and the second tube group (12), and the hydrogen supply module (3) sequentially supplies hydrogen to the second solid-state hydrogen storage module (2) through the first tube group (11) and the third tube group (13); The hydrogen released by the first solid-state hydrogen storage module (1) sequentially passes through the second tube group (12), the fourth tube group (14), and the sixth tube group (16) to provide hydrogen for the hydrogen-using module (6); and the hydrogen released by the second solid-state hydrogen storage module (2) sequentially passes through the third tube group (13), the fifth tube group (15), and the sixth tube group (16) to provide hydrogen for the hydrogen-using module (6); The heat transfer medium outlet of the first solid-state hydrogen storage module (1) and the heat transfer medium outlet of the second solid-state hydrogen storage module (2) are respectively connected to a first heat exchange main pipe (18), the end of the first heat exchange main pipe (18) is connected to the heat transfer medium inlet of the energy storage heat exchange module (5), the heat transfer medium inlet of the first solid-state hydrogen storage module (1) and the heat transfer medium inlet of the second solid-state hydrogen storage module (2) are respectively connected to a second heat exchange main pipe (19), and the end of the second heat exchange main pipe (19) is connected to the heat transfer medium outlet of the energy storage heat exchange module (5); The interior of the energy storage and heat exchange module (5) is filled with a phase change material, and the heat released when the first solid-state hydrogen storage module (1) absorbs hydrogen and the heat released when the second solid-state hydrogen storage module (2) absorbs hydrogen are respectively transferred to the energy storage and heat exchange module (5) through a heat-conducting medium, so that the phase change material performs phase change energy storage, and then heat is supplied by the phase change material when the first solid-state hydrogen storage module (1) or the second solid-state hydrogen storage module (2) releases hydrogen.

2. A hydrogen storage and supply system for wind and solar power generation as claimed in claim 1, characterized in that: The first solid-state hydrogen storage module (1) comprises a plurality of first hydrogen storage tanks (104), the interior of a single first hydrogen storage tank (104) is filled with a metal hydride hydrogen storage material, the gas port of the single first hydrogen storage tank (104) is connected to the second tube group (12) via a first connecting branch pipe (101), the heat transfer medium outlet of the single first hydrogen storage tank (104) is connected to the first heat exchange main pipe (18) via a second connecting branch pipe (102), and the heat transfer medium inlet of the single first hydrogen storage tank (104) is connected to the second heat exchange main pipe (19) via a third connecting branch pipe (103).

3. A hydrogen storage and supply system for wind and solar power generation as claimed in claim 1, characterized in that: The second solid-state hydrogen storage module (2) comprises a plurality of second hydrogen storage tanks (201) connected in parallel, and a single second hydrogen storage tank (201) is filled with a metal hydride hydrogen storage material.

4. A hydrogen storage and supply system for wind and solar power generation as claimed in claim 1, characterized in that: The energy storage heat exchange module (5) comprises an energy storage tank (501), a serpentine heat exchange tube (502) is installed inside the energy storage tank (501), and a phase change material is filled between the outer wall surface of the heat exchange tube (502) and the inner wall surface of the energy storage tank (501).

5. A hydrogen storage and supply system for wind and solar power generation as claimed in claim 1, characterized in that: The hydrogen module (6) comprises a cooler (608) and a buffer tank (605) which are connected in series in sequence, and the hydrogen outlet of the buffer tank (605) is connected to the hydrogen inlet of the hydrogen consuming equipment through a hydrogen supply pipe group.

6. A hydrogen storage and supply system for wind and solar power generation as claimed in claim 5, characterized in that: The hydrogen consuming equipment adopts a hydrogen internal combustion engine (601) or a hydrogen fuel cell (602).

7. A hydrogen storage and supply system for wind and solar power generation as claimed in claim 6, characterized in that: The exhaust gas outlet of the hydrogen internal combustion engine (601) or the exhaust gas outlet of the hydrogen fuel cell (602) is connected to the first heat exchange inlet of the plate heat exchanger (609) via the exhaust gas intake pipe group (610); the first heat exchange outlet of the plate heat exchanger (609) is installed with the exhaust gas exhaust pipe group (613); the second heat exchange outlet of the plate heat exchanger (609) is connected to the first heat exchange main pipe (18) via the first heat exchange pipe group (611); the second heat exchange inlet of the plate heat exchanger (609) is connected to the second heat exchange main pipe (19) via the second heat exchange pipe group (612).

8. A hydrogen storage and supply system for wind and solar power generation as claimed in claim 1, characterized in that: The auxiliary heat exchange module (8) further comprises an auxiliary heat exchange module (8), the auxiliary heat exchange module (8) comprising an oil tank (802), the heat transfer medium inlet of the oil tank (802) being connected to the heat transfer medium outlet of the cooling device (803) via a first connecting pipe group (805), the heat transfer medium inlet of the cooling device (803) being connected to the heat transfer medium outlet of the oil tank (802) via a second connecting pipe group (806), the first connecting pipe group (805) being connected to the first heat transfer main pipe (18) via a first bypass branch pipe (807), and the second connecting pipe group (806) being connected to the first heat transfer main pipe (18) via a second bypass branch pipe (808); An electric heater (801) is installed on the outside of the oil tank (802), and the electric heater (801) heats the heat-conducting medium in the oil tank (802).

9. A hydrogen storage and supply system for wind and solar power generation as claimed in claim 8, characterized in that: A replenishment port (804) for replenishing the heat-conducting medium is provided on the wall surface of the oil tank (802).

10. A hydrogen storage and supply system for wind and solar power generation as claimed in claim 1, characterized in that: A circulating pump (7) is mounted on the second heat exchange main pipe (19).

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