Energy-saving solid hydrogen storage system
By utilizing the energy storage heat exchange unit and solid hydrogen storage unit in the solid hydrogen storage system, and employing thermally conductive media and phase change materials, the problem of unstable hydrogen storage in the wind and solar power generation-water electrolysis hydrogen production system has been solved, achieving efficient and stable hydrogen supply and improved safety.
Patent Information
- Application Number
- CN202423321478.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-31
AI Technical Summary
In existing large-scale wind and solar power generation-water electrolysis hydrogen production systems, hydrogen storage suffers from large footprint, low safety and instability, and difficulty in meeting hydrogen absorption and desorption requirements, thus affecting hydrogen storage efficiency and safety.
An energy-saving solid-state hydrogen storage system is adopted, including an energy storage heat exchange unit and a solid-state hydrogen storage unit. It stores and releases hydrogen by transferring heat through a heat transfer medium and uses phase change materials and metal hydride hydrogen storage materials to achieve stable hydrogen supply. The solid-state hydrogen storage units are connected in parallel to supply hydrogen independently.
It achieves efficient and stable hydrogen storage and release, reduces system energy consumption, improves safety and stability, reduces maintenance costs, and is suitable for unstable hydrogen sources in wind and solar power generation.
Smart Images
Figure CN223649096U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to solid hydrogen storage technical field especially an energy -conserving solid hydrogen storage system. BACKGROUND
[0002] With the development of renewable energy field technology, water electrolysis hydrogen production technology appears, and this technology takes wind energy and solar energy as power source, has the characteristics of clean, sustainable and can convert intermittent electric energy into chemical energy storage.
[0003] In prior art, high-pressure gas cylinder is often used for hydrogen storage in the rear end of large-scale wind-solar power generation-water electrolysis hydrogen production system.
[0004] However, the above-mentioned hydrogen storage mode has the problems of large floor area, difficulty in simultaneously meeting the hydrogen absorption and release states and low safety; at the same time, the instability of wind-solar power generation directly affects the efficiency and yield of water electrolysis hydrogen production, thereby it is difficult to provide stable hydrogen input for the rear-end hydrogen storage system, further increasing the difficulty of hydrogen energy storage, transportation and utilization. UTILITY MODEL CONTENTS
[0005] Therefore, it is necessary to provide an energy -conserving solid hydrogen storage system in view of the problems of low hydrogen storage efficiency, poor safety and stability and single function of the hydrogen storage system caused by the instability of hydrogen source in prior art, which is difficult to provide stable hydrogen input for the rear-end hydrogen storage system.
[0006] The technical scheme adopted by the utility model is as follows:
[0007] An energy -conserving solid hydrogen storage system, comprising an energy storage heat exchange unit, a first heat exchange main pipe is cooperatively installed at the heat conduction medium inlet of the energy storage heat exchange unit, the first heat exchange main pipe is connected with the heat conduction medium outlet of two solid hydrogen storage units respectively, a second heat exchange main pipe is cooperatively installed at the heat conduction medium outlet of the energy storage heat exchange unit, and the second heat exchange main pipe is connected with the heat conduction medium inlet of two solid hydrogen storage units respectively.
[0008] The gas ports of the two solid hydrogen storage units are connected with the hydrogen discharge ports of the hydrogen source respectively, and the gas ports of the two solid hydrogen storage units are also connected with the hydrogen inlet ports of hydrogen equipment respectively.
[0009] The hydrogen source supplies hydrogen independently to two solid hydrogen storage units, and the heat released when a single solid hydrogen storage unit absorbs hydrogen is transmitted to the energy storage heat exchange unit through the heat conduction medium, so that the state of the phase change material filled in the energy storage heat exchange unit changes, and heat storage is further carried out.
[0010] The heat stored in the energy storage and heat exchange unit is transferred to one of the solid-state hydrogen storage units through the heat conducting medium, so that the corresponding solid-state hydrogen storage unit stably releases hydrogen, thereby stably supplying hydrogen to the hydrogen-using equipment.
[0011] As a further improvement of the above technical solution:
[0012] The hydrogen outlet of the hydrogen source is connected to the first interface of the first three-way valve through the first pipe group, the second interface of the first three-way valve is connected to the gas port of one solid-state hydrogen storage unit through the second pipe group, and the third interface of the first three-way valve is connected to the gas port of another solid-state hydrogen storage unit through the third pipe group, thereby independently supplying hydrogen to the two solid-state hydrogen storage units through the hydrogen source.
[0013] The hydrogen-using equipment is connected to the first interface of the second three-way valve through the fourth pipe group, the second interface of the second three-way valve is connected to the second pipe group through the fifth pipe group, and the third interface of the second three-way valve is connected to the third pipe group through the sixth pipe group, thereby independently supplying hydrogen to the hydrogen-using equipment through the two solid-state hydrogen storage units 2.
[0014] A single solid-state hydrogen storage unit includes at least one hydrogen storage tank, the inside of a single hydrogen storage tank is filled with metal hydride hydrogen storage material, a first connecting branch pipe is fitted and installed at the gas port of a single hydrogen storage tank, the heat conducting medium outlet of a single hydrogen storage tank is connected to the first heat exchange main pipe through a second connecting branch pipe, and the heat conducting medium inlet of a single hydrogen storage tank is connected to the second heat exchange main pipe through a third connecting branch pipe.
[0015] The energy storage and heat exchange unit includes an energy storage tank, a heat exchange pipe in a serpentine shape is fitted and installed in the inside of the energy storage tank, and a phase change material is filled between the outer wall surface of the heat exchange pipe and the inner wall surface of the energy storage tank.
[0016] It also includes an auxiliary heat exchange unit, which provides heat or cold to the energy storage and heat exchange unit, so that the state of the phase change material in the energy storage and heat exchange unit changes.
[0017] The auxiliary heat exchange unit includes an oil tank, the heat conducting medium inlet of the oil tank is connected to the heat conducting medium outlet of the cooling equipment through a first connecting pipe group, the heat conducting medium inlet of the cooling equipment is connected to the heat conducting medium outlet of the oil tank through a second connecting pipe group, the first connecting pipe group is connected to the 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.
[0018] An electric heater is fitted and installed outside the oil tank, and the electric heater heats the heat conducting medium in the oil tank.
[0019] The hydrogen-using equipment adopts a hydrogen internal combustion engine or a hydrogen fuel cell.
[0020] When the hydrogen equipment adopts a hydrogen internal combustion engine or a hydrogen fuel cell, the tail gas discharge port of the hydrogen equipment is connected with the first heat exchange inlet of the plate heat exchanger through a tail gas inlet pipe group, the first heat exchange outlet of the plate heat exchanger is provided with a tail gas discharge pipe group, the second heat exchange outlet of the plate heat exchanger is connected with the first heat exchange main pipe through a first heat exchange pipe group, and the second heat exchange inlet of the plate heat exchanger is connected with the second heat exchange main pipe through a second heat exchange pipe group.
[0021] The tail gas treatment device is matched and installed on the tail gas discharge pipe group.
[0022] The hydrogen equipment has the advantages that:
[0023] The hydrogen equipment has the advantages that:
[0024] The hydrogen equipment has the advantages that: BRIEF DESCRIPTION OF DRAWINGS
[0025] Fig. 1 The hydrogen equipment has the advantages that:
[0026] Fig. 2 The hydrogen equipment has the advantages that:
[0027] Fig. 3 The hydrogen equipment has the advantages that:
[0028] 1, hydrogen source; 2, solid hydrogen storage unit; 3, energy storage heat exchange unit; 4, safety valve; 5, first heat exchange main pipe; 6, second heat exchange main pipe; 7, oil-gas separator; 8, auxiliary heat exchange unit; 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, cooler; 18, buffer tank; 19, filter; 20, plate heat exchanger; 21, first heat exchange pipe group; 22, second heat exchange pipe group; 23, tail gas inlet pipe group; 24, tail gas discharge pipe group; 25, hydrogen equipment;
[0029] 201. First connecting branch pipe; 202. Second connecting branch pipe; 203. Third connecting branch pipe; 204. Hydrogen storage tank;
[0030] 301. Energy storage tank; 302. Heat exchange tube; 303. Insulation layer;
[0031] 801. Electric heater; 802. Oil tank; 803. Cooling equipment; 804. Replenishment port; 805. First connecting pipe assembly; 806. Second connecting pipe assembly; 807. First bypass branch pipe; 808. Second bypass branch pipe. Detailed Implementation
[0032] The specific embodiments of this utility model are described below with reference to the accompanying drawings.
[0033] The structure and function of this utility model are as follows:
[0034] like Figs. 1-3 As shown, an energy-saving solid-state hydrogen storage system includes an energy storage heat exchange unit 3. A first heat exchange main pipe 5 is installed at the inlet of the heat transfer medium of the energy storage heat exchange unit 3. The first heat exchange main pipe 5 is connected to the heat transfer medium outlets of two solid-state hydrogen storage units 2. A second heat exchange main pipe 6 is installed at the outlet of the heat transfer medium of the energy storage heat exchange unit 3. The second heat exchange main pipe 6 is connected to the heat transfer medium inlet of the two solid-state hydrogen storage units 2. The gas ports of the two solid-state hydrogen storage units 2 are connected to the hydrogen exhaust ports of the hydrogen source 1. Simultaneously, the gas ports of the two solid-state hydrogen storage units 2 are also respectively... The system is connected to the hydrogen inlet of the hydrogen-using device 25. Hydrogen is supplied independently to two solid-state hydrogen storage units 2 via a hydrogen source 1. The heat released when a single solid-state hydrogen storage unit 2 absorbs hydrogen is transferred to the energy storage heat exchange unit 3 via a heat transfer medium, causing a change in the state of the phase change material filled in the energy storage heat exchange unit 3, thus storing heat. The heat stored in the energy storage heat exchange unit 3 is transferred to one of the solid-state hydrogen storage units 2 via the heat transfer medium, allowing the corresponding solid-state hydrogen storage unit 2 to stably release hydrogen, thereby providing a stable hydrogen supply to the hydrogen-using device 25. This application, by setting up solid-state hydrogen storage units 2 and energy storage heat exchange units 3, can efficiently store the hydrogen input from the hydrogen source 1, and can store the heat released by the solid-state hydrogen storage units 2 absorbing hydrogen through the energy storage heat exchange unit 3. Simultaneously, this heat can be used to heat the solid-state hydrogen storage units 2 when they release hydrogen, thereby saving energy and reducing system maintenance costs. Furthermore, the two solid-state hydrogen storage units 2 can independently and stably supply hydrogen to the hydrogen-using device 25, achieving integrated hydrogen storage and supply.
[0035] This application uses 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 rate of the solid hydrogen storage unit 2 through temperature changes.
[0036] The second heat exchange main pipe 6 is fitted and installed with a circulating pump, which is used to drive the heat conducting medium to circulate and flow between the two solid-state hydrogen storage units 2 and the energy storage heat exchange unit 3, so as to perform heat transfer.
[0037] In the present application, the hydrogen source 1 adopts a wind-solar power generation-water electrolysis hydrogen production system, which is an unstable hydrogen source and intermittently provides hydrogen for the solid-state hydrogen storage system, and the hydrogen flow is unstable; the solid-state hydrogen storage system of the present application can stably store the hydrogen provided by the unstable hydrogen source, and continuously and stably release hydrogen when the hydrogen-using equipment 25 needs to use.
[0038] The hydrogen outlet of the hydrogen source 1 is connected with the first interface of the first three-way valve 9 through the first pipe group 11, the second interface of the first three-way valve 9 is connected with the gas port of one solid-state hydrogen storage unit 2 through the second pipe group 12, and the third interface of the first three-way valve 9 is connected with the gas port of another solid-state hydrogen storage unit 2 through the third pipe group 13, so as to independently supply hydrogen to the two solid-state hydrogen storage units 2 through the hydrogen source 1.
[0039] The hydrogen-using equipment 25 is connected with the first interface of the second three-way valve 10 through the fourth pipe group 14, the second interface of the second three-way valve 10 is connected with the second pipe group 12 through the fifth pipe group 15, and the third interface of the second three-way valve 10 is connected with the third pipe group 13 through the sixth pipe group 16, so as to independently supply hydrogen to the hydrogen-using equipment 25 through the two solid-state hydrogen storage units 2.
[0040] The single solid-state hydrogen storage unit 2 comprises at least one hydrogen storage tank 204, the inside of the single hydrogen storage tank 204 is filled with metal hydride hydrogen storage material, the first connecting branch pipe 201 is fitted and installed at the gas port of the single hydrogen storage tank 204, the heat conducting medium outlet of the single hydrogen storage tank 204 is connected with the first heat exchange main pipe 5 through the second connecting branch pipe 202, and the heat conducting medium inlet of the single hydrogen storage tank 204 is connected with the second heat exchange main pipe 6 through the third connecting branch pipe 203. The multiple hydrogen storage tanks 204 in the solid-state hydrogen storage unit 2 are connected in parallel, and the hydrogen source 1 independently supplies hydrogen to the multiple hydrogen storage tanks 204, and each hydrogen storage tank 204 can independently supply hydrogen to the hydrogen-using equipment 25. The gas port of the hydrogen storage tank 204 is an opening for inflow or outflow of hydrogen.
[0041] In addition, the outside of the single hydrogen storage tank 204 is provided with a jacket, and the jacket flows with heat conducting medium.
[0042] 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.
[0043] The energy storage heat exchange unit 3 comprises an energy storage tank 301, a heat exchange pipe 302 in a serpentine shape is fitted and installed in the energy storage tank 301, and a phase change material is filled between the outer wall surface of the heat exchange pipe 302 and the inner wall surface of the energy storage tank 301. The energy storage tank 301 is wrapped with a heat preservation layer 303. When the phase change material is heated to a melting temperature, a phase change (melting) from a solid state to a liquid state is generated, and in the melting process, the phase change material absorbs and stores a large amount of latent heat; when the phase change material is cooled, the stored heat needs to be released in order to maintain temperature stability, thereby generating a reverse phase change from a liquid state to a solid state. In the 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, thereby forming a wide temperature platform and accompanying a large amount of heat absorption or release.
[0044] The auxiliary heat exchange unit 8 is further included, the auxiliary heat exchange unit 8 provides heat or cold to the energy storage heat exchange unit 3, so that the substance state of the phase change material in the energy storage heat exchange unit 3 changes; the auxiliary heat exchange unit 8 comprises an oil tank 802, a heat conduction medium inlet of the oil tank 802 is connected with a heat conduction medium outlet of a cooling device 803 through a first connecting pipe group 805, a heat conduction medium inlet of the cooling device 803 is connected with a heat conduction medium outlet of the oil tank 802 through a second connecting pipe group 806, the first connecting pipe group 805 is connected with a first heat exchange main pipe 5 through a first bypass branch pipe 807, and the second connecting pipe group 806 is connected with the first heat exchange main pipe 5 through a second bypass branch pipe 808; an electric heater 801 is fitted and installed outside the oil tank 802, and the electric heater 801 heats the heat conduction medium in the oil tank 802. By arranging the electric heater 801, heat can be provided to the system when the system starts or energy is insufficient; by arranging the cooling device 803, the temperature of the heat conduction oil in the system can be prevented from being too high and difficult to dissipate heat in time, thereby effectively ensuring the safety and stability of the system.
[0045] A replenishing opening 804 for replenishing the heat conduction medium is arranged on the wall surface of the oil tank 802, the replenishing opening 804 is connected with an external pipeline, and the heat conduction oil can be replenished in time to the system through the replenishing opening 804, so as to avoid the loss of the heat conduction oil affecting the heat conduction efficiency.
[0046] The hydrogen equipment 25 adopts a hydrogen internal combustion engine or a hydrogen fuel cell; when the hydrogen equipment 25 adopts a hydrogen internal combustion engine or a hydrogen fuel cell, an exhaust gas discharge port of the hydrogen equipment 25 is connected with a first heat exchange inlet of the plate heat exchanger 20 through an exhaust gas inlet pipe group 23, a first heat exchange outlet of the plate heat exchanger 20 is provided with an exhaust gas discharge pipe group 24, a second heat exchange outlet of the plate heat exchanger 20 is connected with the first heat exchange main pipe 5 through a first heat exchange pipe group 21, and a second heat exchange inlet of the plate heat exchanger 20 is connected with the second heat exchange main pipe 6 through a second heat exchange pipe group 22. The heat in the high-temperature exhaust gas discharged by the hydrogen internal combustion engine or the hydrogen fuel cell can be stored by the energy storage heat exchange unit 3, so as to further improve the energy utilization rate and reduce the energy consumption.
[0047] The tail gas exhaust pipe group 24 is fitted with a tail gas treatment device.
[0048] In addition, the fourth pipe group 14 is fitted with, in sequence, a cooler 17, a filter 19, and a buffer tank 18, and the hydrogen outlet of the buffer tank 18 is connected to the hydrogen inlet of the hydrogen supply pipe group connecting hydrogen equipment 25; the hydrogen inlet of the buffer tank 18 can also be directly connected to the hydrogen outlet of the hydrogen source 1, so that the buffer tank 18 is directly filled with gaseous hydrogen from the hydrogen source 1.
[0049] The output end of the fourth pipe group 14 of the present application can be provided with a low-pressure hydrogen gas output end and a high-pressure hydrogen gas output end, respectively, the low-pressure hydrogen gas output end outputs normal-pressure hydrogen gas, and a pressure boosting assembly is arranged between the low-pressure hydrogen gas output end and the high-pressure hydrogen gas output end, so that high-pressure hydrogen gas is output through the high-pressure hydrogen gas output end.
[0050] The first heat exchange main pipe 5 is fitted with an oil-gas separator 7, which can remove excess gas in the heat exchange pipeline and improve the safety performance of the system.
[0051] As shown in the drawings, Fig. 3 In an embodiment of the present application, a safety valve 4 is fitted on the connecting pipe group between the hydrogen source 1 and the two solid-state hydrogen storage units 2 and on the connecting pipe group between the hydrogen equipment 25 and the two solid-state hydrogen storage units 2, so as to avoid excessive pressure in the pipeline and improve the safety of the system.
[0052] In the present application, each pipeline can be in the form of a plurality of short pipes spliced together or in the form of a long pipe according to specific use requirements and installation requirements; a corresponding control valve assembly is fitted on each pipeline, which is configured according to actual production requirements; in addition, flow meters, pressure gauges, temperature gauges, and other monitoring equipment are fitted in the system to ensure safe and stable operation of the system.
[0053] The working process of the present application is as follows:
[0054] As shown in the drawings, Figs. 1-3 The solid-state hydrogen storage unit 2 on the upper side of the definition diagram is defined as the first solid-state hydrogen storage unit, and the solid-state hydrogen storage unit 2 on the lower side of the definition diagram is defined as the second solid-state hydrogen storage unit, and the solid-state hydrogen storage system of the present application includes the following working states:
[0055] (1) Only one of the solid-state hydrogen storage units 2 absorbs hydrogen;
[0056] In this state, when the first solid-state hydrogen storage unit alone absorbs hydrogen, the first interface and the second interface of the first three-way valve 9 are made to be conductive, so that the hydrogen source 1 inputs hydrogen gas into the first solid-state hydrogen storage unit, and the input hydrogen gas enters the inside of the corresponding hydrogen storage tank 204 through the first connecting branch pipe 201, and a chemical reaction occurs between the metal hydride hydrogen storage material and the hydrogen gas, so as to absorb hydrogen gas;
[0057] For a single hydrogen storage tank 204, the heat released by the absorption of hydrogen gas causes the heat-conducting medium in its jacket to steadily increase in temperature, and the heated heat-conducting medium enters the heat exchange pipe 302 of the energy storage heat exchange unit 3 in turn through the corresponding second connecting branch pipe 202 and first heat exchange main pipe 5, causing the phase change material to melt, so that the temperature of the heat-conducting medium flowing out of the heat exchange pipe 302 decreases, and the cooled heat-conducting medium flows back into the jacket on the outer lateral surface of the corresponding hydrogen storage tank 204 in turn through the second heat exchange main pipe 6 and third connecting branch pipe 203, and forms a cycle, until the absorption of hydrogen gas ends.
[0058] The hydrogen absorption process of the second solid-state hydrogen storage unit is similar to that of the first solid-state hydrogen storage unit, and will not be described here.
[0059] (2) Only one of the solid-state hydrogen storage units 2 releases hydrogen gas;
[0060] In this state, when the first solid-state hydrogen storage unit releases hydrogen gas alone, the first interface and the second interface of the second three-way valve 10 are made to be in conduction, and at the hydrogen release temperature, the first solid-state hydrogen storage unit releases hydrogen gas due to the change in pressure inside the hydrogen storage tank 204, and the released hydrogen gas enters the hydrogen-using equipment 25 in turn through the corresponding first connecting branch pipe 201, second pipe group 12, and fourth pipe group 14;
[0061] At the same time, the heat-conducting medium in the jacket corresponding to the hydrogen storage tank 204 enters the heat exchange pipe 302 of the energy storage heat exchange unit 3 in turn through the corresponding second connecting branch pipe 202 and first heat exchange main pipe 5, and the phase change material releases heat, causing the heat-conducting medium in the heat exchange pipe 302 to stabilize at the hydrogen release temperature, and the heated heat-conducting medium flows back into the jacket on the outer lateral surface of the corresponding hydrogen storage tank 204 in turn through the second heat exchange main pipe 6 and third connecting branch pipe 203, and forms a cycle, until the release of hydrogen gas ends.
[0062] The hydrogen release process of the second solid-state hydrogen storage unit is similar to that of the first solid-state hydrogen storage unit, and will not be described here.
[0063] (3) One of the solid-state hydrogen storage units 2 absorbs hydrogen gas while the other solid-state hydrogen storage unit 2 releases hydrogen gas;
[0064] In this state, when the first solid-state hydrogen storage unit absorbs hydrogen gas while the second solid-state hydrogen storage unit releases hydrogen gas, the first interface and the second interface of the first three-way valve 9 are made to be in conduction, and the hydrogen source 1 enters the inside of the corresponding hydrogen storage tank 204 in turn through the first pipe group 11, second pipe group 12, and corresponding first connecting branch pipe 201, and is absorbed by the metal hydride hydrogen storage material in the inside of the hydrogen storage tank 204.
[0065] The first interface and the third interface of the second three-way valve 10 are communicated, and the second solid-state hydrogen storage unit releases hydrogen at the hydrogen release temperature due to the change of the pressure inside the hydrogen storage tank 204, and the released hydrogen enters the hydrogen-using equipment 25 through the corresponding first connecting branch pipe 201, the sixth pipe group 16 and the fourth pipe group 14 in sequence;
[0066] At the same time, the heat-conducting medium in the first solid-state hydrogen storage unit flows into the first heat exchange main pipe 5 through the corresponding second connecting branch pipe 202, and the heat-conducting medium in the second solid-state hydrogen storage unit flows into the first heat exchange main pipe 5 through the corresponding second connecting branch pipe 202, and then flows into the energy storage heat exchange unit 3 through the first heat exchange main pipe 5, so that the phase change of the phase-change material in the energy storage heat exchange unit 3 occurs (so that the temperature of the heat-conducting medium is stabilized at about 320 DEG C), and the heat-conducting medium after temperature stabilization flows into the second heat exchange main pipe 6 and enters the first solid-state hydrogen storage unit and the second solid-state hydrogen storage unit through the corresponding third connecting branch pipe 203 in sequence;
[0067] In this process, the auxiliary heat exchange unit 8 provides additional cold or heat for the heat-conducting medium, so as to ensure the stable operation of the system.
[0068] The process that the first solid-state hydrogen storage unit releases hydrogen while the second solid-state hydrogen storage unit absorbs hydrogen is similar to the above process, and details are not repeated here.
[0069] The above description is an explanation of the utility model, not a limitation of the utility model, and the scope of the utility model is defined in the claims, and any form of modification within the protection scope of the utility model can be made.
Claims
1. An energy-saving solid-state hydrogen storage system, characterized in that: The device includes an energy storage heat exchange unit (3), a first heat exchange main pipe (5) is installed at the heat transfer medium inlet of the energy storage heat exchange unit (3), the first heat exchange main pipe (5) is connected to the heat transfer medium outlet of the two solid hydrogen storage units (2) respectively, and a second heat exchange main pipe (6) is installed at the heat transfer medium outlet of the energy storage heat exchange unit (3), the second heat exchange main pipe (6) is connected to the heat transfer medium inlet of the two solid hydrogen storage units (2) respectively; The gas ports of the two solid hydrogen storage units (2) are respectively connected to the hydrogen discharge port of the hydrogen source (1). At the same time, the gas ports of the two solid hydrogen storage units (2) are also respectively connected to the hydrogen inlet of the hydrogen-using equipment (25). Hydrogen is supplied independently to the two solid hydrogen storage units (2) by the hydrogen source (1). The heat released when a single solid hydrogen storage unit (2) absorbs hydrogen is transferred to the energy storage heat exchange unit (3) through the heat transfer medium, thereby changing the material state of the phase change material filled in the energy storage heat exchange unit (3) and thus storing heat. The heat stored in the energy storage heat exchange unit (3) is transferred to one of the solid hydrogen storage units (2) through the heat transfer medium, so that the corresponding solid hydrogen storage unit (2) can stably release hydrogen and thus stably supply hydrogen to the hydrogen-using equipment (25).
2. The energy-saving solid-state hydrogen storage system as described in claim 1, characterized in that: The hydrogen outlet of the hydrogen source (1) is connected to the first interface of the first three-way valve (9) through the first pipe group (11), the second interface of the first three-way valve (9) is connected to the gas port of a solid hydrogen storage unit (2) through the second pipe group (12), and the third interface of the first three-way valve (9) is connected to the gas port of another solid hydrogen storage unit (2) through the third pipe group (13), so that the hydrogen source (1) can supply hydrogen independently to the two solid hydrogen storage units (2).
3. The energy-saving solid-state hydrogen storage system as described in claim 2, characterized in that: The hydrogen-using device (25) is connected to the first interface of the second three-way valve (10) through the fourth pipe group (14), the second interface of the second three-way valve (10) is connected to the second pipe group (12) through the fifth pipe group (15), and the third interface of the second three-way valve (10) is connected to the third pipe group (13) through the sixth pipe group (16), so that the two solid hydrogen storage units 2 (2) can independently supply hydrogen to the hydrogen-using device (25).
4. The energy-saving solid-state hydrogen storage system as described in claim 1, characterized in that: A single solid hydrogen storage unit (2) includes at least one hydrogen storage tank (204). The interior of the single hydrogen storage tank (204) is filled with metal hydride hydrogen storage material. A first connecting branch pipe (201) is installed at the gas port of the single hydrogen storage tank (204). The heat transfer medium outlet of the single hydrogen storage tank (204) is connected to the first heat exchange main pipe (5) through the second connecting branch pipe (202). The heat transfer medium inlet of the single hydrogen storage tank (204) is connected to the second heat exchange main pipe (6) through the third connecting branch pipe (203).
5. The energy-saving solid-state hydrogen storage system as described in claim 1, characterized in that: The energy storage heat exchange unit (3) includes an energy storage tank (301), and a serpentine heat exchange tube (302) is installed inside the energy storage tank (301). The outer wall of the heat exchange tube (302) and the inner wall of the energy storage tank (301) are filled with phase change material.
6. The energy-saving solid-state hydrogen storage system as described in claim 1, characterized in that: It also includes an auxiliary heat exchange unit (8), which provides heat or cold to the energy storage heat exchange unit (3), thereby changing the material state of the phase change material in the energy storage heat exchange unit (3).
7. The energy-saving solid-state hydrogen storage system as described in claim 6, characterized in that: The auxiliary heat exchange unit (8) 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 a 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 a second connecting pipe group (806). The first connecting pipe group (805) is connected to the first heat exchange main pipe (5) through a first bypass branch pipe (807). The second connecting pipe group (806) is connected to the first heat exchange main pipe (5) through a second bypass branch pipe (808). An electric heater (801) is installed on the outside of the oil tank (802) to heat the heat-conducting medium in the oil tank (802).
8. The energy-saving solid-state hydrogen storage system as described in claim 1, characterized in that: The hydrogen-using equipment (25) employs a hydrogen internal combustion engine or a hydrogen fuel cell.
9. The energy-saving solid-state hydrogen storage system as described in claim 1, characterized in that: When the hydrogen-using device (25) adopts a hydrogen internal combustion engine or a hydrogen fuel cell, the exhaust port of the hydrogen-using device (25) is connected to the first heat exchange inlet of the plate heat exchanger (20) through the exhaust gas inlet pipe group (23), the exhaust gas outlet of the plate heat exchanger (20) is equipped with the exhaust gas outlet pipe group (24), the second heat exchange outlet of the plate heat exchanger (20) is connected to the first heat exchange main pipe (5) through the first heat exchange pipe group (21), and the second heat exchange inlet of the plate heat exchanger (20) is connected to the second heat exchange main pipe (6) through the second heat exchange pipe group (22).
10. The energy-saving solid-state hydrogen storage system as described in claim 9, characterized in that: An exhaust gas treatment device is installed on the exhaust gas emission pipe assembly (24).