CN117704273A - Magnesium-based solid-state circulating hydrogen storage and release system utilizing low-cost electricity and working method thereof - Google Patents
Magnesium-based solid-state circulating hydrogen storage and release system utilizing low-cost electricity and working method thereof Download PDFInfo
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- CN117704273A CN117704273A CN202311833472.0A CN202311833472A CN117704273A CN 117704273 A CN117704273 A CN 117704273A CN 202311833472 A CN202311833472 A CN 202311833472A CN 117704273 A CN117704273 A CN 117704273A
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- based solid
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- conducting medium
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 103
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 103
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 100
- 229910052749 magnesium Inorganic materials 0.000 title claims abstract description 75
- 239000011777 magnesium Substances 0.000 title claims abstract description 75
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims abstract description 74
- 230000005611 electricity Effects 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000005338 heat storage Methods 0.000 claims abstract description 49
- 238000012546 transfer Methods 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 91
- 239000007787 solid Substances 0.000 claims description 47
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 26
- 239000011449 brick Substances 0.000 claims description 13
- 238000005485 electric heating Methods 0.000 claims description 13
- 239000000395 magnesium oxide Substances 0.000 claims description 13
- 238000003795 desorption Methods 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 4
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 claims description 2
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000010248 power generation Methods 0.000 description 6
- 229910000861 Mg alloy Inorganic materials 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 239000000956 alloy Substances 0.000 description 4
- 238000004146 energy storage Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 229910052863 mullite Inorganic materials 0.000 description 3
- 239000010455 vermiculite Substances 0.000 description 3
- 229910052902 vermiculite Inorganic materials 0.000 description 3
- 235000019354 vermiculite Nutrition 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 239000011490 mineral wool Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000011232 storage material Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 150000002680 magnesium Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
The invention discloses a magnesium-based solid-state circulating hydrogen storage and release system utilizing low-cost electricity and a working method thereof. The magnesium-based solid-state circulating hydrogen storage and release system comprises a heat storage device, a magnesium-based solid-state circulating hydrogen storage and release device and a heat conducting medium circulating system. The heat storage device is internally provided with a heat storage component, and a first heat conducting medium channel is arranged in the heat storage component. The magnesium-based solid-state circulating hydrogen storage and release device is provided with a second heat conducting medium channel. The heat conducting medium circulation system is used for connecting the first heat conducting medium channel and the second heat conducting medium channel. And in the period that the electric power is sufficient and the price is lower than the average electricity price of the common power grid, converting the electric energy into heat and storing the heat in the heat storage device. When the magnesium-based solid-state circulating hydrogen storage and release device needs heat, the heat storage device transfers the heat to the magnesium-based solid-state circulating hydrogen storage and release device by means of the heat conducting medium. The invention can consume a large amount of valley electricity, wind electricity and photovoltaic electricity energy, and has the advantages of energy conservation, environmental protection and no pollution.
Description
Technical Field
The invention relates to a magnesium-based solid-state circulating hydrogen storage and release system, in particular to a system which utilizes low-cost electricity (wind power, photovoltaic electricity, valley electricity and the like) to generate heat, stores heat through a heat storage device and heats a magnesium-based solid-state circulating hydrogen storage and release device so as to release hydrogen, and belongs to the technical field of hydrogen energy.
Background
Low cost electricity includes: valley electricity, wind electricity, photovoltaic electricity, and the like. At present, the electricity price of a power grid in the electricity consumption peak period is 1 yuan/degree, and the price of a large amount of valley electricity is 0.25-0.3 yuan/degree. The valley electricity refers to the electric energy generated from 22:00 of the day to 8:00 of the next day, which lasts for 10 hours, and is greatly limited by time. The electricity price of new energy sources such as photovoltaic electricity, wind power and the like is also 0.25-0.3 yuan/degree. Solar power generation, wind power generation and the like are greatly influenced by day and night, meteorological conditions and seasonal changes, and have remarkable discontinuous, unstable and uncontrollable unsteady state characteristics.
Unstable photovoltaic electricity, wind power and grid load fluctuation are overlapped, and the grid dispatching difficulty is increased. When the new energy power generation occupies a relatively small area, the conventional power supply can basically compensate the power fluctuation in real time. However, when large-scale new energy is accessed to the network, the generated power fluctuation range is larger, and the adjustment capability limit of the conventional power supply is likely to be exceeded, so that the power balance is difficult to meet, and the power supply reliability and the running stability of the power grid are reduced. The above reasons lead to the inability of large amounts of photovoltaic and wind power to be networked.
The magnesium-based solid-state cycle hydrogen storage and release system consumes a great deal of electric energy when working. The magnesium-based solid hydrogen storage material is heated and decomposed to release hydrogen, and the hydrogen release process generally adopts an electric heating mode (an electric heating pipe or an electric heating heat conduction oil furnace) to directly heat the solid storage device, and the middle part has no energy storage process.
The main problems of the existing magnesium-based solid-state circulating hydrogen storage and release system are as follows:
(1) The industrial electricity is directly utilized, and the solid hydrogen storage and release device is heated by an electric heater or an electric heating conduction oil furnace, so that the average electricity price cost is up to 1 yuan/degree. And the solid hydrogen storage and release process requires a large amount of heat energy, so that the use and operation cost of the system is high.
(2) The traditional electric heating pipe is used for heating, the area of the electric heating pipe is smaller, and the heat transfer efficiency is lower. When the hydrogen storage and release system needs larger hydrogen storage and release quantity, the number of the electric heating pipes is more, and the equipment is more complicated. On the other hand, when hydrogen is stored, the hydrogen filling cooling process is difficult, and the hydrogen filling time is long.
(3) The traditional heat conduction oil is used for heating, the temperature of the heat conduction oil medium is generally up to 330 ℃, the temperature is relatively low, and the solid state hydrogen release time process is long. If the temperature of the heat conducting oil is increased, the heat conducting oil can deteriorate, and the service life can be shortened.
Disclosure of Invention
The invention aims to solve the technical problems that: the existing magnesium-based solid-state circulation hydrogen storage and release system has high electricity cost, low-cost electricity such as valley electricity, wind power, photovoltaic electricity and the like is abundant, and the power grid is not easy to absorb, so that energy waste is caused.
In order to solve the technical problems, a first aspect of the present invention provides a magnesium-based solid-state circulating hydrogen storage and desorption system using low-cost electricity, comprising a heat storage device, a magnesium-based solid-state circulating hydrogen storage and desorption device and a heat conducting medium circulating system;
the heat storage device is internally provided with a heat storage part, and a first heat conducting medium channel is arranged in the heat storage part;
the magnesium-based solid-state circulating hydrogen storage and release device is provided with a second heat conducting medium channel;
the heat conducting medium circulation system is used for connecting the first heat conducting medium channel and the second heat conducting medium channel.
In some embodiments, the heat storage device also has an electrical heating component inside, which is heated with low cost electricity; low cost power refers to: the price of the electric power is lower than the average electricity price of a common power grid.
In some embodiments, gas is used as a heat conducting medium to circulate in the heat conducting medium circulation system, so that heat of the heat storage device is brought to the magnesium-based solid-state circulation hydrogen storage and release device.
In some embodiments, the thermal storage member comprises magnesia brick or ceramic.
In some embodiments, the heat-conducting medium circulation system is composed of a heat-conducting medium circulation pipeline, a heat-conducting medium power device and a heat-conducting medium control device, wherein the heat-conducting medium power device provides power for the flow of the heat-conducting medium, and the heat-conducting medium control device is used for controlling the flow direction and the flow rate of the heat-conducting medium.
In some embodiments, the thermally conductive media circulation line includes a main loop and a bypass; the first end of the bypass is connected to the main loop through the heat conducting medium control device, and the second end of the bypass is connected to the main loop between the heat storage device and the magnesium-based solid-state circulating hydrogen storage and release device.
In some embodiments, a first temperature sensor is mounted on the main loop downstream of the thermal storage device, a second temperature sensor is mounted on the main loop upstream of the magnesium-based solid state cycle hydrogen storage device, and a third temperature sensor is mounted on the bypass.
In some embodiments, low-cost power devices are also included, the low-cost power providing a lower price of power than the average price of power for a conventional grid.
In some embodiments, the low cost power device comprises one or a combination of more of a wind power generation device, a solar power generation device, a hydro power generation device.
In a second aspect of the present invention, a working method of the above magnesium-based solid-state circulation hydrogen storage system is provided, including the following steps:
step one, converting electric energy into heat in a period of sufficient electric power and a price lower than the average electricity price of a common power grid, and storing the heat in a heat storage device;
and step two, when the magnesium-based solid-state circulating hydrogen storage and release device needs heat, the heat storage device transfers the heat to the magnesium-based solid-state circulating hydrogen storage and release device by virtue of a heat conducting medium circulating in a heat conducting medium circulating system.
The invention has the beneficial effects that: the invention can consume a large amount of valley electricity, wind electricity and photovoltaic electricity energy, and has the advantages of energy conservation, environmental protection and no pollution.
Drawings
FIG. 1 is a schematic diagram of an overall structure of a magnesium-based solid state recycling hydrogen storage system according to a preferred embodiment of the present invention.
FIG. 2 is a schematic diagram of the workflow of a magnesium-based solid state recycling hydrogen storage system according to a preferred embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a heat storage device in a magnesium-based solid-state circulation hydrogen storage system according to a preferred embodiment of the present invention.
100. Low-cost power supply system
200. Power transmission system
300. Heat storage device
301. Solid magnesia brick
302. Mullite
303. Vermiculite plate
304. Thermal insulation building block
305. Base seat
306. Control box
307. Rock wool purifying plate
400 magnesium base solid-state circulation hydrogen storage and release device
401 hydrogen inlet and outlet pipe
511-516 high-temperature gas pipeline
520. High temperature gas control device
530. High-temperature gas power device
601-603 temperature sensor
Detailed Description
The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. The terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. In the description of this patent, unless otherwise indicated, the meaning of "a plurality" is two or more.
The word "comprising" or "having" and the like is intended to mean that elements or items appearing in the "comprising" or "having" preceding the word are included in the "comprising" or "having" the listed elements or items and equivalents thereof, but does not exclude other elements or items.
In the description of the patent, the terms "mounted," "connected," and "connected" as may be used herein are intended to be interpreted broadly, unless explicitly stated or limited otherwise. For example, the connection may be fixed, detachable, or integrally connected. Either mechanically or electrically. Either directly, indirectly through intermediaries, or in communication with the interior of the two elements. The specific meaning of the above terms in this patent can be understood by those skilled in the art in the specific case.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The overall structure of the magnesium-based solid-state circulation hydrogen storage and release system provided by the invention is shown in figure 1, and the system can continuously heat the solid-state circulation hydrogen storage and release device by utilizing low-cost electricity in an energy storage mode. In addition to the usual wind power, photovoltaic power, valley power, etc., all power below the normal grid power rate can be referred to as low cost power, and can also be used in such systems, such as hydropower, stored lithium power, etc.
The working principle of the magnesium-based solid-state circulation hydrogen storage and release system provided by the invention is shown in figure 2, and the heat storage device is heated by using low-cost electric power (photovoltaic power, wind power, valley power and the like). The heat storage device is internally provided with solid heat storage materials such as solid magnesia bricks, heat storage ceramics and the like, and is used for storing the heat energy. The heat storage device is connected with the magnesium-based solid-state circulating hydrogen storage device through a circulating pipeline system, and a heat conducting medium in the circulating pipeline is gas. When the magnesium-based solid-state circulating hydrogen storage and release device needs heat, the gas in the circulating pipeline flows, the gas is heated by the heat storage device to become high-temperature gas, and the high-temperature gas releases heat when flowing through the magnesium-based solid-state circulating hydrogen storage and release device. The high-temperature gas is cooled and then flows to the heat storage device for circulation, so that heat in the heat storage device is continuously brought to the magnesium-based solid-state circulation hydrogen storage and release device.
The structure of the magnesium-based solid-state circulating hydrogen storage and release system is schematically shown in fig. 1. The magnesium-based solid state cyclical hydrogen storage system includes a set of low cost power supply systems 100 that use solar, wind or valley power. The low-cost power supply system 100 may use one of solar power, wind power, and valley power alone; or solar energy, wind power and valley electricity are combined for use, so that the defect of single use is overcome. When it is used with wind power plants, it should comprise a wind power plant as shown at the far left in fig. 1. When it uses photovoltaic devices, it should include necessary equipment such as solar panels that convert solar energy into electrical energy.
The magnesium-based solid-state circulation hydrogen storage and release system provided by the invention is unique in that the heat storage device 300 is adopted. The thermal storage device 300 has an electric heating member (not shown) inside. The heat storage device 300 converts low-cost electric energy such as wind power, photovoltaic power, valley power, etc., which is affected by time, weather, etc., into heat energy by built-in electric heating means, and stores the heat energy inside the heat storage device 300.
The heat storage device 300 is connected to the low-cost power supply system 100 via a power transmission system 200, and the power transmission system 200 includes a wire, a transformer, a switch (not shown), and the like, and may further include an ac/dc converter, and the like, as necessary. The low cost power supply system 100 supplies power to the electrically heated components that emit a significant amount of heat, solid magnesia bricks 301 stored inside the thermal storage device 300, as shown in fig. 3. The multi-layer thermal insulation material wrapped outside the solid magnesia bricks 301 can preserve the heat inside the thermal storage device 300 for a long time. The first layer of heat insulation material outside the solid magnesia brick 301 is mullite 302, a vermiculite plate 303 is outside the mullite 302, a heat insulation block 304 is outside the vermiculite plate 303, and a rock wool purifying plate 307 is outside the heat insulation block 304. The lower part of the heat storage device 300 is provided with a base 305, and the side surface of the heat storage device 300 is provided with a control box 306.
The thermal storage device 300 has a gas inlet connected to the high temperature gas line 515 and a gas outlet connected to the high temperature gas line 511, as shown in fig. 1. In this embodiment, the heat accumulator of the heat accumulating apparatus 300 is made of solid magnesia bricks 301. Gas passages are left in the solid magnesia bricks 301 and the heat stored in the solid magnesia bricks 301 heats the gas to a very high temperature as it flows through these gas passages in the solid magnesia bricks 301. The thermal storage device 300 stores thermal energy when there is a large amount of low-cost electricity. When the electricity cost is at a higher period, the heat storage device 300 supplies heat to the magnesium-based solid state cycle hydrogen storage device 400. In other embodiments, the heat accumulator of the heat accumulator may be a heat accumulating molten salt, a heat accumulating ceramic, or the like.
The magnesium-based solid-state circulation hydrogen storage and release device 400 is internally provided with a heat conducting medium channel through which a heat conducting medium can flow and is used for heating or cooling the hydrogen storage magnesium alloy. The magnesium-based solid state cycle hydrogen storage and release device 400 is connected to the thermal storage device 300 through a thermally conductive medium circulation system, as shown in fig. 1. The heat-conducting medium circulation system is composed of a high-temperature gas circulation pipeline, a high-temperature gas control device 520, a high-temperature gas power device 530 and the like. The high temperature gas circulation line includes a main loop composed of the high temperature gas lines 511, 512, 513, 514, 515 of fig. 1, and a bypass, i.e., the high temperature gas line 516 of fig. 1.
High temperature gas line 512 is connected to magnesium-based solid state cycle storage and release device 400, and magnesium-based solid state cycle storage and release device 400 is connected to high temperature gas line 513. The magnesium-based solid state cycle hydrogen storage and release device 400 is a storage tank body made of magnesium alloy material and a device for performing heat exchange with high-temperature gas, and can be used for charging and releasing hydrogen through the hydrogen inlet pipe 401.
A temperature sensor 601 is mounted on the high-temperature gas line 511, a temperature sensor 602 is mounted on the high-temperature gas line 512, and a temperature sensor 603 is mounted on the high-temperature gas line 516. After passing through the magnesium-based solid-state circulation hydrogen storage and release device 400, the gas temperature is 320 ℃, and the main loop can recycle the high-temperature gas waste heat at 320 ℃.
The hot gas control device 520 may employ an electrically controlled tee mounted in the main body path and connected to the bypass path. The outlet air temperature of the solid magnesia brick heat storage means 300 can be regulated by the high temperature gas control means 520.
The high temperature gas power plant 530 is connected in the main loop of the circulation line. Specifically, the high temperature gas power plant 530 is installed between the magnesium-based solid state cycle hydrogen storage device 400 and the high temperature gas control device 520. Specifically, between the high temperature gas line 513 and the high temperature gas line 514 shown in fig. 1. The high temperature gas power plant 530 may employ a power fan that powers the circulating flow of the high temperature gas heat transfer medium.
The high-temperature gas line 516 serves as a bypass, and a first end thereof is connected to the main circuit through the high-temperature gas control device 520, and a second end thereof is connected to the main circuit located downstream of the heat storage device 300, i.e., the high-temperature gas line 511 or the high-temperature gas line 512 in fig. 1.
The working mode of the magnesium-based solid-state circulation hydrogen storage and release system provided by the embodiment is as follows:
energy storage (I)
When the electric power such as wind power, photovoltaic power, valley power and the like is sufficient and the price is relatively low (generally, at 0.3 yuan/degree, the normal power grid electricity price is 1 yuan/degree), the low-cost power supply system 100 stores heat in the heat storage device 300, and electric energy is converted into heat energy for storage.
(II) heating
When the magnesium-based solid state circulation hydrogen storage and release device 400 releases hydrogen, a large amount of heat is required to heat the solid state hydrogen storage magnesium alloy material therein, so that hydrogen is promoted to escape from the solid state hydrogen storage magnesium alloy material.
The air in the circulation line is initially at normal temperature, and at this time, the high-temperature gas power unit 530 needs to be turned on to pass the air through the high-temperature gas line 514, the high-temperature gas control unit 520, the high-temperature gas line 515, and the heat storage unit 300. After passing through the channels in the solid magnesia bricks 301 of the heat storage device 300, the normal temperature gas is heated to 450 ℃ or higher, and becomes high temperature air.
When the high-temperature air flows through the magnesium-based solid state circulation hydrogen storage and release device 400, the high-temperature air exchanges heat with the magnesium-based solid state circulation hydrogen storage and release device 400, the heat of the high-temperature gas is absorbed by the magnesium-based solid state circulation hydrogen storage and release device 400, and the temperature of the high-temperature gas is reduced from 450 ℃ to about 350 ℃. The temperature of the magnesium-based solid state circulation hydrogen storage and release device 400 increases after absorbing heat, hydrogen starts to be released after reaching the decomposition temperature of the solid magnesium alloy material, and the hydrogen is discharged from the hydrogen inlet pipe 401.
(III) Regulation
When the temperature sensor 602 detects that the gas temperature of the high-temperature gas line 512 is higher than the temperature required by the mg-based solid-state circulation hydrogen storage and release device 400, the high-temperature gas control device 520 starts to adjust the air volume distribution: the gas flow rate of the high-temperature gas line 516 is increased, and the gas flow rate of the high-temperature gas line 515 is decreased. The gas flow rate of the high-temperature gas line 515, that is, the gas flow rate of the high-temperature gas line 511 is increased. The gas in the high-temperature gas line 511 is the air with the higher temperature just flowing out of the heat storage device 300, and the air with the lower temperature flowing in the high-temperature gas line 516, and the gas temperature after neutralization of the two is in accordance with the requirement of the magnesium-based solid-state cycle hydrogen storage and release device 400.
When the temperature sensor 602 detects that the gas temperature of the high-temperature gas pipeline 512 is lower than the temperature required by the magnesium-based solid-state circulation hydrogen storage device 400, the high-temperature gas control device 520 is adjusted, the gas flow of the high-temperature gas pipeline 516 is reduced, and the gas flow of the high-temperature gas pipeline 515 is increased, as in the above principle. The gas flow rate and temperature flowing through the high temperature gas line 512 are such that the usage requirements of the magnesium-based solid state cycle hydrogen storage and release device 400 are met.
The temperature sensor 601 monitors the gas temperature of the high-temperature gas pipeline 511 in real time and feeds back the gas temperature to a central controller (not shown in the figure), the temperature sensor 603 monitors the gas temperature of the high-temperature gas pipeline 516 in real time and feeds back the gas temperature to the central controller, and the central controller calculates proper opening degrees of each path of the high-temperature gas control device 520, so that the gas temperature of the gas flowing into the high-temperature gas pipeline 512 after mixing the gases with different temperatures from the high-temperature gas pipeline 511 and the high-temperature gas pipeline 516 accurately meets the requirement of the magnesium-based solid-state circulation hydrogen storage and release device 400. The temperature sensor 602 detects the high temperature gas line 512 in real time and feeds back the result to the central controller to form a control closed loop.
The magnesium-based solid-state circulation hydrogen storage and release system provided by the invention has the following advantages:
(1) The running cost of the magnesium-based solid-state circulating hydrogen storage and release using process is reduced.
(2) And a large amount of capacity which is not easy to absorb by the power grids such as valley electricity, wind power, photovoltaic electricity and the like is consumed.
(3) The new mode of wind, light, water, valley electricity, energy storage and hydrogen energy utilization is explored and developed, the new hydrogen utilization mode is developed and promoted, and the solid-state circulation hydrogen storage and release is applicable to more different scenes.
(4) Compared with an electric heating tube type hydrogen storage and release device, the magnesium-based solid-state circulating hydrogen storage and release system provided by the invention does not need a large number of electric heating tubes by using common air as a heat conducting medium, and is simple in wiring.
(5) Compared with a heat-conducting oil type hydrogen storage and release device, the magnesium-based solid-state circulating hydrogen storage and release system provided by the invention has the advantages that the heat-conducting medium is air, the temperature is higher (the maximum temperature of the heat-conducting oil medium is 330 ℃, the gas temperature can be higher than 450 ℃), the heat exchange rate is increased, the heat exchange time is shortened, and the air medium has no cost.
The foregoing describes in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the invention by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.
Claims (10)
1. The magnesium-based solid-state circulating hydrogen storage and release system utilizing low-cost electricity is characterized by comprising a heat storage device, a magnesium-based solid-state circulating hydrogen storage and release device and a heat conducting medium circulating system;
the heat storage device is internally provided with a heat storage part, and a first heat conducting medium channel is arranged in the heat storage part;
the magnesium-based solid-state circulating hydrogen storage and release device is provided with a second heat conducting medium channel;
the heat conducting medium circulation system is used for connecting the first heat conducting medium channel and the second heat conducting medium channel.
2. The magnesium-based solid state circulating hydrogen storage and desorption system according to claim 1, wherein the heat storage device is internally provided with an electric heating component, and the electric heating component is heated by low-cost electric power; the low cost power means: the price of the electric power is lower than the average electricity price of a common power grid.
3. The magnesium-based solid state circulating hydrogen storage and desorption system according to claim 1, wherein gas is adopted as a heat conducting medium to circularly flow in the heat conducting medium circulating system, so that heat of the heat storage device is brought to the magnesium-based solid state circulating hydrogen storage and desorption device.
4. A magnesium-based solid state circulating hydrogen storage system as claimed in claim 1, wherein the heat storage member comprises magnesia brick or ceramic.
5. The magnesium-based solid state circulation hydrogen storage and release system according to claim 1, wherein the heat conducting medium circulation system is composed of a heat conducting medium circulation pipeline, a heat conducting medium power device and a heat conducting medium control device, the heat conducting medium power device provides power for the flow of the heat conducting medium, and the heat conducting medium control device is used for controlling the flow direction and flow rate of the heat conducting medium.
6. The magnesium-based solid state circulating hydrogen storage system of claim 5, wherein said heat transfer medium circulation line comprises a main loop and a bypass; the first end of the bypass is connected to the main loop through the heat conducting medium control device, and the second end of the bypass is connected to the main loop between the heat storage device and the magnesium-based solid-state circulating hydrogen storage device.
7. The magnesium-based solid state circulating hydrogen storage system of claim 6, wherein a first temperature sensor is installed on the main loop downstream of said thermal storage device, a second temperature sensor is installed on the main loop upstream of said magnesium-based solid state circulating hydrogen storage device, and a third temperature sensor is installed on said bypass.
8. The magnesium-based solid state cycle hydrogen storage system of claim 1, further comprising low cost electrical power means providing electrical power at a price lower than average utility grid price.
9. The magnesium-based solid state cycle hydrogen storage system of claim 8, wherein said low cost power plant comprises one or a combination of more of a wind power plant, a solar power plant, a hydro power plant.
10. The method of operating a magnesium-based solid state cycle hydrogen storage and release system of claim 1, comprising the steps of:
step one, converting electric energy into heat in a period of sufficient electric power and a price lower than the average electricity price of a common power grid, and storing the heat in the heat storage device;
and step two, when the magnesium-based solid-state circulating hydrogen storage and release device needs heat, the heat storage device transfers the heat to the magnesium-based solid-state circulating hydrogen storage and release device by means of a heat conducting medium circulating in the heat conducting medium circulating system.
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| CN202311833472.0A CN117704273A (en) | 2023-12-28 | 2023-12-28 | Magnesium-based solid-state circulating hydrogen storage and release system utilizing low-cost electricity and working method thereof |
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