CN221171790U - Magnesium-based solid-state hydrogen absorption and desorption system with two-stage phase-change heat storage unit - Google Patents
Magnesium-based solid-state hydrogen absorption and desorption system with two-stage phase-change heat storage unit Download PDFInfo
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- CN221171790U CN221171790U CN202323003266.5U CN202323003266U CN221171790U CN 221171790 U CN221171790 U CN 221171790U CN 202323003266 U CN202323003266 U CN 202323003266U CN 221171790 U CN221171790 U CN 221171790U
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 172
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 172
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 166
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims abstract description 107
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 101
- 239000011777 magnesium Substances 0.000 title claims abstract description 93
- 229910052749 magnesium Inorganic materials 0.000 title claims abstract description 93
- 238000003795 desorption Methods 0.000 title claims abstract description 89
- 238000005338 heat storage Methods 0.000 title claims abstract description 59
- 230000008859 change Effects 0.000 claims abstract description 109
- 239000011232 storage material Substances 0.000 claims abstract description 48
- 239000007787 solid Substances 0.000 claims abstract description 47
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 239000012782 phase change material Substances 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 15
- 238000004891 communication Methods 0.000 claims description 3
- 239000012774 insulation material Substances 0.000 claims description 3
- 229910012375 magnesium hydride Inorganic materials 0.000 description 7
- 150000002431 hydrogen Chemical class 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000012188 paraffin wax Substances 0.000 description 5
- 238000005984 hydrogenation reaction Methods 0.000 description 4
- 229910002651 NO3 Inorganic materials 0.000 description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 3
- 239000002826 coolant Substances 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- -1 magnesium dihydride Chemical compound 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000010333 potassium nitrate Nutrition 0.000 description 1
- 239000004323 potassium nitrate Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- MJWMNCORAUQGIX-UHFFFAOYSA-N sodium nitric acid nitrate Chemical compound [Na+].O[N+]([O-])=O.[O-][N+]([O-])=O MJWMNCORAUQGIX-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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- Hydrogen, Water And Hydrids (AREA)
Abstract
The utility model provides a magnesium-based solid-state hydrogen absorption and desorption system with two-stage phase change heat storage units, which comprises a low-temperature phase change unit, a high-temperature phase change unit and a magnesium-based solid-state hydrogen absorption and desorption unit, wherein the outlet of a heat exchange pipeline of the magnesium-based solid-state hydrogen absorption and desorption unit is communicated with the inlet of a heat exchange pipeline of the high-temperature phase change unit, and the outlet of the heat exchange pipeline of the high-temperature phase change unit is respectively communicated with the inlet of the heat exchange pipeline of the low-temperature phase change unit and the inlet of the heat exchange pipeline of the magnesium-based solid-state hydrogen absorption and desorption unit through three-way valves; the hydrogen output pipeline of the magnesium-based solid hydrogen absorption and desorption unit is arranged in the low-temperature phase change unit in a penetrating way. According to the magnesium-based solid-state hydrogen absorption and desorption system with the two-stage phase change heat storage units, the low-temperature phase change units and the high-temperature phase change units filled with two different types of heat storage materials are arranged for combined application, so that the problem of heat management caused by the time-space difference between hydrogen absorption and hydrogen desorption of the magnesium-based hydrogen storage materials is solved, the energy utilization efficiency of the system is improved, and the high-efficiency hydrogen absorption and desorption of the system is realized.
Description
Technical Field
The utility model relates to a magnesium-based solid-state hydrogen absorption and desorption technology, in particular to a magnesium-based solid-state hydrogen absorption and desorption system with a two-stage phase change heat storage unit.
Background
The magnesium-based solid hydrogen storage utilizes the principle that a magnesium (alloy) material and hydrogen react reversibly at a certain temperature and pressure, so that the storage and release of the hydrogen are realized, and the magnesium-based solid hydrogen storage is safer and more efficient compared with high-pressure gaseous hydrogen storage and liquid hydrogen storage. However, when the magnesium-based solid hydrogen storage material is subjected to hydrogen absorption and desorption reactions, a large amount of reaction heat is released (hydrogen absorption) or absorbed (hydrogen desorption). The prior art lacks a recovery method for heat released during hydrogen absorption of the magnesium-based solid hydrogen storage material, and the heat required by hydrogen release of the magnesium-based solid hydrogen storage material mainly depends on a large amount of electric energy supply, which is unfavorable for efficient application of energy and greatly restricts the running cost and application scene of the magnesium-based solid hydrogen absorption and release unit.
Disclosure of utility model
The utility model aims to solve the problem of insufficient recycling of traditional magnesium-based solid hydrogen storage energy, and provides a magnesium-based solid hydrogen absorption and desorption system with a two-stage phase change heat storage unit.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the magnesium-based solid-state hydrogen absorption and desorption system with the two-stage phase change heat storage units comprises a low-temperature phase change unit, a high-temperature phase change unit and a magnesium-based solid-state hydrogen absorption and desorption unit, wherein the outlet of a heat exchange pipeline of the magnesium-based solid-state hydrogen absorption and desorption unit is communicated with the inlet of a heat exchange pipeline of the high-temperature phase change unit, and the outlet of the heat exchange pipeline of the high-temperature phase change unit is respectively communicated with the inlet of the heat exchange pipeline of the low-temperature phase change unit and the inlet of the heat exchange pipeline of the magnesium-based solid-state hydrogen absorption and desorption unit through three-way valves;
The hydrogen output pipeline of the magnesium-based solid-state hydrogen absorption and desorption unit is arranged in the low-temperature phase change unit in a penetrating way, and when hydrogen is desorbed, the low-temperature phase change heat storage material in the low-temperature phase change unit can be used as a coolant of high-temperature hydrogen.
Further, the low-temperature phase change unit is a heat exchanger filled with a low-temperature phase change material, and the low-temperature phase change material is a material with a phase change temperature T1 of 30-200 ℃. The low-temperature phase change material is paraffin or crystalline hydrated salt. The low-temperature phase change unit and the high-temperature phase change unit are conventional heat exchangers such as a tube type heat exchanger or a plate type heat exchanger.
Further, the high-temperature phase change unit is a heat exchanger filled with a high-temperature phase change heat storage material, and the high-temperature phase change heat storage material is a material with a phase change temperature T2 of 200-350 ℃. The high temperature phase change heat storage material is a molten nitrate, for example: the high-temperature phase-change heat storage material is NaNO 3 with the phase-change temperature of 307 ℃.
Further, the magnesium-based solid hydrogen absorption and desorption unit is a cavity filled with a magnesium-based solid hydrogen absorption and desorption material, the temperature T0 of the magnesium-based solid hydrogen absorption and desorption unit is 200-350 ℃, and the magnesium-based solid hydrogen absorption and desorption material comprises magnesium powder and a catalyst.
Further, the outer walls of the heat exchange pipelines among the low-temperature phase change unit, the high-temperature phase change unit and the magnesium-based solid hydrogen absorption and desorption units are made of heat insulation materials, and heat conduction media are filled in the heat exchange pipelines. The heat conducting medium includes, but is not limited to, heat conducting oil.
Further, temperature sensors are respectively arranged in the low-temperature phase change unit, the high-temperature phase change unit and the magnesium-based solid-state hydrogen absorption and desorption unit.
Further, the magnesium-based solid-state hydrogen absorption and desorption system with the two-stage phase change heat storage unit further comprises a control system, and the control system is respectively in communication connection with the temperature sensor and the three-way valve.
Further, the magnesium-based solid-state hydrogen absorption and desorption system with the two-stage phase change heat storage units further comprises a heat conduction oil bin, wherein the heat conduction oil bin is respectively communicated with an inlet of a low-temperature phase change unit heat exchange pipeline and an inlet of a high-temperature phase change unit heat exchange pipeline through a three-way valve, and a circulating pump is arranged on a pipeline in front of the three-way valve.
Working principle of magnesium-based solid-state hydrogen absorption and desorption system of two-stage phase change heat storage unit:
During hydrogenation, magnesium powder in the magnesium-based solid hydrogen absorption and desorption unit reacts with hydrogen to generate heat released by magnesium hydride, and the heat is removed through heat conduction oil, so that the high-temperature phase-change heat storage material and the low-temperature phase-change heat storage material are sequentially heated;
In a standby state, the low-temperature phase change material is utilized to provide low temperature required by protection and preheating for the magnesium-based solid hydrogen absorption and desorption unit;
when the hydrogen is discharged, the high-temperature phase-change heat storage material is utilized to provide heat required by hydrogen discharge for the magnesium-based solid hydrogen absorption and discharge unit, and the hydrogen flows through the low-temperature phase-change material, so that the high-temperature hydrogen can be cooled while the low-temperature phase-change material is heated;
Further, during hydrogenation, hydrogen is introduced into the magnesium-based solid-state hydrogen absorption and desorption unit, magnesium powder reacts with the hydrogen to form magnesium dihydride, heat is released at the same time, the temperature T0 of the magnesium-based solid-state hydrogen absorption and desorption unit is controlled to be more than or equal to T2 (the temperature of hydrogenation can be adjusted by adjusting the hydrogen pressure or adding auxiliary heating mode to enable the temperature to be higher than the phase change temperature of the phase change material), a heat conducting medium is sequentially transmitted to the high-temperature phase change heat storage material and the low-temperature phase change heat storage material through a heat exchange pipeline, the high-temperature phase change heat storage material and the low-temperature phase change heat storage material absorb heat, when the temperature is continuously increased and reaches respective phase change temperature, the phase change occurs, the heat is continuously absorbed until the phase change is completed, and the absorbed heat reaches saturation.
Further, in the standby state, after the hydrogenation is completed, the magnesium-based solid hydrogen absorption and desorption unit enters the standby state, and at the moment, a heat exchange pipeline between the low-temperature phase change material and the magnesium-based solid hydrogen absorption and desorption unit is opened, so that the temperature of the magnesium-based solid hydrogen absorption and desorption unit is maintained at T1.
Further, when the hydrogen is discharged, a heat exchange pipeline between the low-temperature phase change unit and the magnesium-based solid-state hydrogen absorption and discharge unit is closed to switch the heat exchange pipeline, the heat exchange pipeline between the high-temperature phase change unit and the magnesium-based solid-state hydrogen absorption and discharge unit is communicated, a heat medium with the temperature of T2 is circularly input into the magnesium-based solid-state hydrogen absorption and discharge unit, magnesium dihydride in the magnesium-based solid-state hydrogen absorption and discharge unit is decomposed, high-temperature hydrogen (the temperature is slightly lower than T2) is released, the high-temperature hydrogen enters the low-temperature phase change heat storage material through an output pipeline to exchange heat, and the temperature of the hydrogen is cooled to T1 after heat exchange, so that the use condition is achieved. The high-temperature phase-change heat of the high-temperature phase-change material is from the hydrogen absorption heat of the solid-state hydrogen storage material, and the temperature of hydrogen absorption can be controlled to be slightly higher than the phase-change temperature (T2) of the high-temperature phase-change material, so that the temperature of the heat released during hydrogen absorption is higher than or equal to T2 and is stored by the high-temperature phase-change material. When hydrogen is released, heat is conducted back to the hydrogen storage material by the high-temperature phase change material, and the temperature of the hydrogen storage material does not exceed T2, but is enough for the material to release hydrogen.
Supplementary explanation: the heat loss of the system may slightly cause incomplete reaction or affect the hydrogen absorption and desorption speed, but can be compensated by controlling the hydrogen pressure, and basically, the heat compensation is not needed.
Further, when the hydrogen end is a hydrogen fuel cell, the low-temperature phase-change heat storage material is communicated with the waste heat output end of the fuel cell through a heat exchange pipeline, so that the energy application efficiency can be further improved.
The material consumption of the high-temperature phase-change heat storage material is matched with the heat released by the absorption and release of hydrogen of the magnesium-based solid hydrogen storage material, and the material consumption of the low-temperature phase-change heat storage material is matched with the heat released by the cooling of hydrogen.
Compared with the prior art, the magnesium-based solid-state hydrogen absorption and desorption system with the two-stage phase change heat storage unit has the following advantages:
1) According to the utility model, the low-temperature phase-change unit and the high-temperature phase-change unit are respectively filled with the low-temperature phase-change heat storage material and the high-temperature phase-change heat storage material, so that the heat released during the hydrogen absorption of the system is stored for reuse, and a large amount of energy sources are saved. Secondly, the high-temperature phase-change heat storage material stores high temperature, the heat can be used as energy supply when the system releases hydrogen, and the energy (electrothermal energy) provided by the outside is not needed, so that the system can be normally used in places without energy supply conditions, and the use scene of the system is widened; on the other hand, the energy consumption cost is greatly reduced.
2) The reaction enthalpy value of the hydrogen absorption and desorption reaction of the magnesium hydride hydrogen storage material in the magnesium-based solid-state hydrogen absorption and desorption unit is 76KJ/mol-H 2(38MJ/kg-H2, namely the heat value of the hydrogen absorption/desorption of the magnesium hydride hydrogen storage material is 38MJ (about 11 KWh) when the hydrogen absorption/desorption of 1kg of hydrogen is carried out, the magnesium-based solid-state hydrogen absorption and desorption unit with the hydrogen storage amount of 300kg is taken as an example, the prior art adopts electricity to provide energy for hydrogen desorption, at least 3300 ℃ electricity is needed, the part of electric energy is not needed by the technical scheme provided by the project, the hydrogen storage cost is reduced by about 5 yuan per kilogram of hydrogen, and the cost reduction effect is remarkable.
3) The low-temperature phase-change heat storage material in the low-temperature phase-change unit stores low temperature, and the heat can supplement the heat loss of the system when the system is transported in a long-distance and winter cold area, so that the safety of the system is protected; before the system discharges hydrogen, the system can be preheated, so that the hydrogen discharge speed is improved, and the heat supply quantity of the high-temperature phase-change heat storage material is reduced; when the system releases hydrogen, the low-temperature phase-change heat storage material can also be used as a coolant of high-temperature hydrogen.
In summary, the magnesium-based solid-state hydrogen absorption and desorption system with the two-stage phase change heat storage units is based on the hydrogen absorption and desorption characteristics of the magnesium-based hydrogen storage materials, and solves the problem of heat management of the magnesium-based hydrogen storage materials due to the space-time difference of hydrogen absorption and desorption by combining and applying the units filled with two different types of heat storage materials (high temperature and low temperature), so that the energy utilization efficiency of the system is improved, and the high-efficiency hydrogen absorption and desorption of the system are realized.
Drawings
Fig. 1 is a schematic structural diagram of a magnesium-based solid-state hydrogen absorption and desorption management system based on a two-stage phase change heat storage material.
Wherein 1, a magnesium-based solid hydrogen absorption and desorption unit; 2. a low temperature phase change unit; 3. a high temperature phase change unit; 4. a heat exchange pipeline; 5. a hydrogen output line; 6. a three-way valve; 7. a circulation pump; 8. and a heat conducting oil bin.
Detailed Description
The utility model is further illustrated by the following examples:
example 1
The embodiment discloses a magnesium-based solid-state hydrogen absorption and desorption system with a two-stage phase change heat storage unit, as shown in fig. 1, a low-temperature phase change unit 2, a high-temperature phase change unit 3 and a magnesium-based solid-state hydrogen absorption and desorption unit 1, wherein the outlet of a heat exchange pipeline of the magnesium-based solid-state hydrogen absorption and desorption unit 1 is communicated with the inlet of a heat exchange pipeline of the high-temperature phase change unit 3, and the outlet of the heat exchange pipeline of the high-temperature phase change unit 3 is respectively communicated with the inlet of the heat exchange pipeline of the low-temperature phase change unit 2 and the inlet of the heat exchange pipeline of the magnesium-based solid-state hydrogen absorption and desorption unit 1 through a three-way valve 6; the outer walls of the heat exchange pipelines 4 among the low-temperature phase change units 2, the high-temperature phase change units 3 and the magnesium-based solid hydrogen absorption and desorption units 1 are made of heat insulation materials, and the heat exchange pipelines 4 are filled with heat conduction oil.
The hydrogen output pipeline 5 of the magnesium-based solid-state hydrogen absorption and desorption unit 1 is arranged in the low-temperature phase change unit 2 in a penetrating way, and when hydrogen is desorbed, the low-temperature phase change heat storage material in the low-temperature phase change unit 2 can be used as a coolant of high-temperature hydrogen.
The low-temperature phase change unit 2 is a heat exchange structure filled with a low-temperature phase change material, the low-temperature phase change material is a material with a phase change temperature T1 of 30-200 ℃, specifically, the low-temperature phase change material is paraffin, the phase change temperature is 47 ℃, and the phase change enthalpy is: 210J/g.
The high-temperature phase-change unit 3 is a heat exchange structure filled with a high-temperature phase-change heat storage material, the high-temperature phase-change heat storage material is a material with a phase-change temperature T2 of 200-350 ℃, and concretely, the high-temperature phase-change heat storage material is a mixture of molten nitrate sodium nitrate and potassium nitrate, the phase-change temperature is 284 ℃, and the phase-change enthalpy is: 170J/g.
The low-temperature phase change unit 2 and the high-temperature phase change unit 3 are conventional heat exchangers such as a tube type heat exchanger or a plate type heat exchanger.
The magnesium-based solid hydrogen absorption and desorption unit 1 is a cavity filled with a magnesium-based solid hydrogen absorption and desorption material, the temperature T0 of the magnesium-based solid hydrogen absorption and desorption unit is 200-350 ℃, and the magnesium-based solid hydrogen absorption and desorption material comprises magnesium powder and a catalyst. The hydrogen absorption temperature is highest, and the hydrogen release temperature is slightly lower than the phase change temperature T2 of the high-temperature phase change heat storage material.
Temperature sensors are respectively arranged in the low-temperature phase change unit 2, the high-temperature phase change unit 3 and the magnesium-based solid-state hydrogen absorption and desorption unit 1. The magnesium-based solid-state hydrogen absorption and desorption system with the two-stage phase-change heat storage unit further comprises a control system, and the control system is respectively in communication connection with the temperature sensor and the control valve.
The magnesium-based solid-state hydrogen absorption and desorption system with the two-stage phase change heat storage units further comprises a heat conduction oil bin 8, the heat conduction oil bin 8 is respectively communicated with an inlet of a low-temperature phase change unit heat exchange pipeline and an inlet of a high-temperature phase change unit heat exchange pipeline through a three-way valve, and a circulating pump 7 is arranged on a pipeline in front of the three-way valve.
The rough calculation results of the various material consumption under the different hydrogen storage requirements according to the heat balance are shown in table 1:
table 1 shows the amounts of the various materials
The hydrogen storage amount is set to 300kg, 4200kg of pure magnesium powder is filled in the magnesium-based solid hydrogen absorption and desorption unit, 75000kg of nitrate is filled in the high-temperature phase change unit, and 2700kg of paraffin is filled in the low-temperature phase change unit. The magnesium-based solid-state hydrogen absorption and desorption unit, the low-temperature phase change unit and the high-temperature phase change unit are connected through a heat exchange pipeline, and heat conduction oil is filled in the heat conduction oil bin.
During charging, hydrogen with the temperature of 200 ℃ and the pressure of 0.2MPa is charged into the magnesium-based solid hydrogen absorption and desorption unit 1, pure magnesium powder filled in the magnesium-based solid hydrogen absorption and desorption unit 1 absorbs hydrogen and converts the hydrogen into magnesium hydride, heat is released, the temperature rises until the equilibrium temperature is 310 ℃, at this time, conduction heat conduction oil is conducted to cool the magnesium hydride, the high-temperature heat conduction oil after absorbing the heat respectively flows through a high-temperature phase-change heat storage material of the high-temperature phase-change unit 3 and a low-temperature phase-change heat storage material of the low-temperature phase-change unit 2 through a heat exchange pipeline, heat is conducted to the high-temperature phase-change heat storage material and the low-temperature phase-change heat storage material, the heat is cooled to be low-temperature heat conduction oil, and then the magnesium-based solid hydrogen absorption and desorption unit 1 is again fed to cool the magnesium hydride, and the circulation is performed until the magnesium powder hydrogen absorption is completed, at this time, nitrate in the high-temperature phase-change unit 3 is heated to 284 ℃, and paraffin in the low-temperature phase-change unit is heated to 47 ℃.
In the transportation process, the heat stored in the paraffin in the low-temperature phase change unit 2 is transmitted to the magnesium-based solid hydrogen absorption and desorption unit through the heat conduction oil and the heat exchange pipeline, so that the temperature of the whole pipeline, the heat conduction oil and the hydrogen storage device is maintained at 30 ℃.
When the magnesium-based solid hydrogen absorption and desorption unit 1 is used for hydrogen desorption, a heat exchange pipeline between the high-temperature phase change unit 3 and the magnesium-based solid hydrogen absorption and desorption unit 1 is opened, high-temperature heat conduction oil at 280 ℃ is circularly introduced, magnesium hydride in the magnesium-based solid hydrogen absorption and desorption unit 1 is heated, high-temperature hydrogen is released, and the high-temperature hydrogen flows through a low-temperature phase change heat storage material through a hydrogen output pipeline, and is subjected to heat exchange and cooling to form 47 ℃ low-temperature hydrogen suitable for use.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Claims (8)
1. The magnesium-based solid-state hydrogen absorption and desorption system with the two-stage phase change heat storage units is characterized by comprising a low-temperature phase change unit, a high-temperature phase change unit and a magnesium-based solid-state hydrogen absorption and desorption unit, wherein the outlet of a heat exchange pipeline of the magnesium-based solid-state hydrogen absorption and desorption unit is communicated with the inlet of a heat exchange pipeline of the high-temperature phase change unit, and the outlet of the heat exchange pipeline of the high-temperature phase change unit is respectively communicated with the inlet of the heat exchange pipeline of the low-temperature phase change unit and the inlet of the heat exchange pipeline of the magnesium-based solid-state hydrogen absorption and desorption unit through three-way valves; the hydrogen output pipeline of the magnesium-based solid hydrogen absorption and desorption unit is arranged in the low-temperature phase change unit in a penetrating way.
2. The solid state hydrogen absorption and desorption system of magnesium base with two-stage phase change heat storage unit of claim 1 wherein said low temperature phase change unit is a heat exchanger filled with low temperature phase change material.
3. The solid state hydrogen absorption and desorption system of magnesium base with two-stage phase change heat storage unit of claim 1 wherein said high temperature phase change unit is a heat exchanger filled with high temperature phase change heat storage material.
4. The solid state magnesium-based hydrogen absorption and desorption system with two-stage phase change heat storage unit of claim 1 wherein said solid state magnesium-based hydrogen absorption and desorption unit is a chamber filled with solid state magnesium-based hydrogen absorption and desorption material.
5. The magnesium-based solid hydrogen absorption and desorption system with the two-stage phase change heat storage units according to claim 1, wherein heat insulation materials are adopted on the outer walls of heat exchange pipelines among the low-temperature phase change units, the high-temperature phase change units and the magnesium-based solid hydrogen absorption and desorption units, and heat conduction media are filled in the heat exchange pipelines.
6. The magnesium-based solid state hydrogen absorption and desorption system with the two-stage phase change heat storage unit according to claim 1, wherein temperature sensors are respectively arranged in the low-temperature phase change unit, the high-temperature phase change unit and the magnesium-based solid state hydrogen absorption and desorption unit.
7. The solid state magnesium based hydrogen absorption and desorption system with two-stage phase change heat storage unit according to claim 6, further comprising a control system in communication with the temperature sensor and the three-way valve, respectively.
8. The solid state magnesium based hydrogen absorption and desorption system with two-stage phase change heat storage unit of claim 1, further comprising a heat conducting oil bin, wherein the heat conducting oil bin is respectively communicated with the low temperature phase change unit heat exchange pipeline inlet and the high temperature phase change unit heat exchange pipeline inlet through three-way valves.
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Address after: Room 501, Office Building of the Management Committee of Pulandian Economic Development Zone, Dalian City, Liaoning Province, 116085 Patentee after: Dalian Fude Jinyu New Energy Co.,Ltd. Country or region after: China Address before: Room 501, Office Building of the Management Committee of Pulandian Economic Development Zone, Dalian City, Liaoning Province, 116085 Patentee before: Dalian Jinyu New Energy Co.,Ltd. Country or region before: China |