Magnesium-based hydrogen storage device with high heat transfer efficiency

Abstract

The utility model relates to a magnesium-based hydrogen storage device with high heat transfer efficiency, which comprises at least one hydrogen storage module, and each hydrogen storage module adopts a magnesium-based hydrogen storage material to absorb or release hydrogen; the at least one energy transfer module is detachably mounted at the bottom and / or the top of the hydrogen storage module, the energy transfer module and the hydrogen storage module are alternately stacked, and a pipeline for heat-conducting fluid to circulate is arranged in the energy transfer module; the wall face of each energy transfer module is attached to the wall face of the corresponding adjacent hydrogen storage module, so that the hydrogen storage modules are heated or cooled in a heat conduction mode, and then the hydrogen storage modules absorb or release hydrogen stably. By adopting the integrated design of the hydrogen storage module and the energy transfer module, the heat transfer efficiency can be improved, the energy loss is reduced, and the heating uniformity is improved, so that the hydrogen absorption and desorption rate of the magnesium-based hydrogen storage alloy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of solid hydrogen storage, in particular to a magnesium-based hydrogen storage device with high heat transfer efficiency. Background Art

[0002] With the transformation of the global energy structure and the rapid development of renewable energy, hydrogen energy, as a clean, efficient and renewable secondary energy source, is increasingly attracting attention from countries around the world. However, the storage and transportation of hydrogen has always been a bottleneck restricting the large-scale application of hydrogen energy. Metal oxide hydrogen storage technology is a method of storing hydrogen atoms in metal pores by chemically reacting hydrogen with new alloy materials, which has higher safety and lower cost.

[0003] Metal hydride hydrogen storage devices in the prior art usually adopt the form of a storage tank with a built-in hydrogen storage alloy, such as titanium, rare earth and magnesium. Among them, magnesium materials have the advantages of high hydrogen storage mass density and abundant resources. However, due to the large difference between the hydrogen absorption temperature and hydrogen release temperature of magnesium-based hydrogen storage alloys (hydrogen absorption temperature is 280°C and hydrogen release temperature is 340°C), traditional solid-state hydrogen storage devices need to be equipped with additional heating devices to heat them when storing or releasing hydrogen to reach the corresponding working temperature of magnesium-based hydrogen storage alloys. The heat transfer efficiency is poor, the energy consumption is high, and the heating is uneven, which seriously affects and reduces the hydrogen absorption and desorption rate of magnesium-based hydrogen storage alloys. Utility Model Content

[0004] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides a magnesium-based hydrogen storage device with high heat transfer efficiency. By adopting an integrated design of a hydrogen storage module and an energy transfer module, the heat transfer efficiency can be improved, the energy loss can be reduced, and the heating uniformity can be improved, thereby increasing the hydrogen absorption and desorption rate of the magnesium-based hydrogen storage alloy.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A magnesium-based hydrogen storage device with high heat transfer efficiency, comprising:

[0007] At least one hydrogen storage module, each hydrogen storage module using magnesium-based hydrogen storage material to absorb or release hydrogen;

[0008] At least one energy transfer module, which is detachably mounted on the bottom and / or top of the hydrogen storage module, and is alternately stacked with the hydrogen storage module, and has a pipeline for the circulation of a heat transfer fluid disposed therein;

[0009] The wall surface of the energy transfer module is in contact with the wall surface of the corresponding adjacent hydrogen storage module, so that the hydrogen storage module is heated or cooled by heat conduction, thereby allowing the hydrogen storage module to stably absorb or release hydrogen.

[0010] As a further improvement of the above technical solution:

[0011] The structure of the hydrogen storage module is as follows: it comprises a disc-shaped hydrogen storage plate, a cavity is arranged inside the hydrogen storage plate, at least one magnesium cake is placed inside the cavity, and the magnesium cake is made of magnesium-based alloy.

[0012] The volume of the magnesium cake is smaller than the volume of the cavity.

[0013] The magnesium cake is in a disc shape, with a thickness of 10 mm and a diameter of 300 mm.

[0014] An air hole is provided on the top wall surface of the hydrogen storage plate, a connecting air pipe is installed in the air hole, and the cavity is connected with an external air source through the connecting air pipe.

[0015] The structure of the energy transfer module is as follows: it includes two aluminum plates, a single aluminum plate is in the shape of a disc, a mounting groove is provided on the working end surface of the single aluminum plate, the two aluminum plates are concentrically and symmetrically arranged so that the two working end surfaces fit together, so that the two mounting grooves are connected to form a mounting cavity, and a serpentine tube is installed in the mounting cavity.

[0016] A heat transfer fluid flows in the serpentine tube, and the heat transfer fluid is heat transfer oil or hot / cold air.

[0017] A clamping ring is arranged along the circumference on the outer wall surface of the single aluminum plate, and the energy transfer module is detachably mounted with the adjacent hydrogen storage module through the clamping ring.

[0018] The thickness of the aluminum plate is 8 mm.

[0019] The outer diameter of the serpentine tube is 6 mm.

[0020] The beneficial effects of the utility model are as follows:

[0021] The utility model has a compact and reasonable structure and is easy to operate. By arranging a hydrogen storage module and an energy transfer module, heat can be transferred based on heat conduction, and the heat transfer efficiency is high and the energy utilization rate is high. At the same time, the wall surfaces of the hydrogen storage module and the energy transfer module are fitted together, which can improve the uniformity of heating and increase the hydrogen absorption and desorption rates of the magnesium-based hydrogen storage alloy.

[0022] The utility model also has the following advantages:

[0023] (1) The hydrogen storage module and the energy transfer module in the utility model have a compact structure and can be arranged in a variety of combinations, making them flexible and convenient to use.

[0024] (2) In the present invention, the heat transfer efficiency can be further improved by making the bottom wall of the magnesium cake fit with the inner bottom wall of the hydrogen storage plate and making the thickness of the magnesium cake slightly less than or equal to the height of the cavity.

[0025] (3) In the present invention, by making the volume of the magnesium cake smaller than the volume of the cavity, the stability of the hydrogen absorption and release process can be ensured.

[0026] (4) In the present invention, a retaining ring is provided to realize detachable installation between the energy transfer module and the hydrogen storage module, which can prevent the energy transfer module from shifting relative to the hydrogen storage module and ensure the stability of the temperature rise process inside the cavity.

[0027] (5) In the present invention, the energy utilization rate can be improved by providing a serpentine pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The structure of the utility model is shown in FIG. Figure 1 .

[0029] Figure 2 The structure of the utility model is shown in FIG. Figure 1 .

[0030] Figure 3 for Figure 2 Top view of the .

[0031] Figure 4 for Figure 3 Cross-sectional view of section AA.

[0032] Figure 5 for Figure 3 Cross-sectional view of section BB.

[0033] Figure 6 It is a schematic diagram of the structure of a single aluminum plate in the utility model.

[0034] Among them: 1. Hydrogen storage module; 2. Energy transfer module; 3. Connecting gas pipe;

[0035] 101, hydrogen storage plate; 102, cavity; 103, magnesium cake;

[0036] 201. Aluminum plate; 202. Mounting groove; 203. Serpentine tube. DETAILED DESCRIPTION

[0037] The specific implementation of the utility model is described below in conjunction with the accompanying drawings.

[0038] The structure and functions of the utility model are as follows:

[0039] like Figure 1-Figure 6As shown, a magnesium-based hydrogen storage device with high heat transfer efficiency includes: at least one hydrogen storage module 1, each hydrogen storage module 1 uses magnesium-based hydrogen storage materials to absorb or release hydrogen; at least one energy transfer module 2, which can be detachably installed at the bottom and / or top of the hydrogen storage module 1, and is alternately stacked with the hydrogen storage module 1, and is provided with a pipeline for the circulation of heat transfer fluid; the wall surface of the energy transfer module 2 is in contact with the wall surface of the corresponding adjacent hydrogen storage module 1, so that the hydrogen storage module 1 is heated or cooled by heat conduction, so that the hydrogen storage module 1 can stably absorb or release hydrogen. In the utility model, the hydrogen storage module 1 is provided for the storage or release of hydrogen, and the energy transfer module 2 is provided to heat the hydrogen storage module 1 based on the heat conduction method, so that the hydrogen storage module 1 reaches the corresponding hydrogen absorption temperature (280°C) or hydrogen release temperature (340°C), and the heat transfer efficiency is high, the energy utilization rate is high, and the heating is uniform, thereby improving the absorption and release rate of hydrogen of the magnesium-based hydrogen storage alloy.

[0040] like Figure 1 As shown, a hydrogen storage module 1 and an energy transfer module 2 may be provided, and the energy transfer module 2 may be arranged at the bottom of the hydrogen storage module 1 so that the top wall surface of the energy transfer module 2 fits with the bottom wall surface of the hydrogen storage module 1, thereby heating the hydrogen storage module 1 based on heat conduction.

[0041] like Figure 2 As shown, two hydrogen storage modules 1 and one energy transfer module 2 may be provided, and the energy transfer module 2 may be arranged between the two hydrogen storage modules 1 so that the top wall surface of the energy transfer module 2 fits with the bottom wall surface of one hydrogen storage module 1, and at the same time, the bottom wall surface of the energy transfer module 2 fits with the top wall surface of the other hydrogen storage module 1, thereby heating the two hydrogen storage modules 1 based on heat conduction.

[0042] like Figure 1-Figure 5 As shown, the structure of the hydrogen storage module 1 is as follows: it includes a disc-shaped hydrogen storage plate 101, a cavity 102 is provided inside the hydrogen storage plate 101, at least one magnesium cake 103 is placed inside the cavity 102, and the magnesium cake 103 is made of magnesium-based alloy.

[0043] By setting a cavity 102 inside the hydrogen storage module 1, a magnesium cake 103 can be placed. The magnesium cake 103 is pressed using a magnesium-based hydrogen storage material and is used to absorb or release hydrogen. The magnesium cake 103 is disc-shaped, the thickness of the magnesium cake 103 is 10 mm, and the diameter of the magnesium cake 103 is 300 mm.

[0044] In order to further improve the heat transfer efficiency, the hydrogen storage plate 101 is made of metal.

[0045] In order to ensure the stability of the hydrogen absorption and release process, the volume of the magnesium cake 103 is smaller than the volume of the cavity 102 ; in addition, in order to ensure the heat transfer efficiency, the thickness of the magnesium cake 103 is slightly smaller than or equal to the height of the cavity 102 .

[0046] To prevent hydrogen leakage, the cavity 102 is a closed cavity, and an air hole is provided on the top wall of the hydrogen storage plate 101. A connecting air pipe 3 is installed in the air hole, and the cavity 102 is connected to an external gas source through the connecting air pipe 3. External hydrogen can enter the cavity 102 through the connecting air pipe 3, and then be absorbed by the magnesium cake 103 in the cavity 102 for storage; the hydrogen released by the magnesium cake 103 in the cavity 102 is transported to the outside of the hydrogen storage module 1 through the connecting air pipe 3.

[0047] like Figure 1-Figure 6 As shown, the structure of the energy transfer module 2 is: it includes two aluminum plates 201, a single aluminum plate 201 is disc-shaped, and a mounting groove 202 is provided on the working end surface of the single aluminum plate 201. The two aluminum plates 201 are concentrically and symmetrically arranged so that the two working end surfaces fit together, so that the two mounting grooves 202 are connected to form a mounting cavity, and a serpentine tube 203 is installed in the mounting cavity.

[0048] A heat transfer fluid flows in the serpentine tube 203 , and the heat transfer fluid is heat transfer oil or hot / cold air.

[0049] A clamping ring (not shown in the figure) is arranged along the circumference of the outer wall surface of the single aluminum plate 201, and the energy transfer module 2 is detachably mounted with the adjacent hydrogen storage module 1 through the clamping ring. The inner diameter of the clamping ring is less than or equal to the outer diameter of the hydrogen storage plate 101, so that it is tightly matched with the hydrogen storage plate 101, so that the energy transfer module 2 is positioned, and the energy transfer module 2 is prevented from shifting relative to the hydrogen storage module 1, so as to ensure the stability of the temperature rise process inside the cavity 102.

[0050] The thickness of the single aluminum plate 201 is 8 mm, the outer diameter of the serpentine tube 203 is 6 mm, and the depth of the mounting groove 202 on the single aluminum plate 201 is slightly greater than or equal to 3 mm.

[0051] The working process of the utility model is as follows:

[0052] When hydrogen storage is required, firstly, the serpentine tube 103 is connected to the mold temperature controller through the delivery pipe group, and heat transfer oil with a temperature of at least 280° C. (usually 300° C.) is introduced into the serpentine tube 103 through the mold temperature controller, and the heat transfer oil is circulated between the serpentine tube 103 and the mold temperature controller;

[0053] After a period of time, hydrogen is introduced into the cavity 102 through the connecting air pipe 3, and the magnesium cake 103 absorbs hydrogen under the condition of an ambient temperature ≥ 280°C, thereby storing the hydrogen in the hydrogen storage module 1; in addition, the magnesium cake 103 releases heat when absorbing hydrogen. At this time, the heating of the heat transfer oil is stopped, and the heat transfer oil begins to enter the serpentine tube 203 at room temperature to take away the temperature released when the magnesium cake 103 absorbs hydrogen, so that the magnesium cake 103 absorbs hydrogen at a low temperature;

[0054] When hydrogen release is required, the serpentine tube 103 is first connected to the mold temperature controller through the delivery pipe group, and heat transfer oil with a temperature of at least 340° C. (usually 360° C.) is introduced into the serpentine tube 103 through the mold temperature controller, and the heat transfer oil is circulated between the serpentine tube 103 and the mold temperature controller;

[0055] At the same time, by connecting the connecting air pipe 3 through the external pipe group, the magnesium cake 103 (at this time, the magnesium cake 103 is a magnesium hydride cake storing hydrogen) releases hydrogen into the cavity 102 quickly and stably under the condition of an ambient temperature ≥340°C, and the hydrogen in the cavity 102 is transported to the outside of the hydrogen storage module 1 through the connecting air pipe 3 and the external pipe group in turn.

[0056] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the protection scope of the utility model.

Claims

1. A magnesium-based hydrogen storage device with high heat transfer efficiency, characterized in that: include: At least one hydrogen storage module (1), each hydrogen storage module (1) adopts a magnesium-based hydrogen storage material to absorb or release hydrogen; at least one energy transfer module (2), which is detachably mounted on the bottom and / or top of the hydrogen storage module (1), and is alternately stacked with the hydrogen storage module (1), and has a pipeline for the circulation of a heat transfer fluid disposed therein; The wall surface of the energy transfer module (2) is in contact with the wall surface of the corresponding adjacent hydrogen storage module (1), thereby heating or cooling the hydrogen storage module (1) by heat conduction, thereby enabling the hydrogen storage module (1) to stably absorb or release hydrogen.

2. A magnesium-based hydrogen storage device with high heat transfer efficiency as claimed in claim 1, characterized in that: The structure of the hydrogen storage module (1) is as follows: it comprises a disc-shaped hydrogen storage plate (101), a cavity (102) is arranged inside the hydrogen storage plate (101), at least one magnesium cake (103) is placed inside the cavity (102), and the magnesium cake (103) is made of a magnesium-based alloy.

3. A magnesium-based hydrogen storage device with high heat transfer efficiency as claimed in claim 2, characterized in that: The volume of the magnesium cake (103) is smaller than the volume of the cavity (102).

4. A magnesium-based hydrogen storage device with high heat transfer efficiency as claimed in claim 2, characterized in that: The magnesium cake (103) is in a disc shape, the thickness of the magnesium cake (103) is 10 mm, and the diameter of the magnesium cake (103) is 300 mm.

5. A magnesium-based hydrogen storage device with high heat transfer efficiency as claimed in claim 2, characterized in that: An air hole is provided on the top wall surface of the hydrogen storage plate (101), a connecting air pipe (3) is installed in the air hole, and the cavity (102) is connected to an external air source through the connecting air pipe (3).

6. A magnesium-based hydrogen storage device with high heat transfer efficiency as claimed in claim 1, characterized in that: The energy transfer module (2) has a structure comprising two aluminum plates (201), wherein the single aluminum plate (201) is in the shape of a disk, and a mounting groove (202) is provided on a working end surface of the single aluminum plate (201). The two aluminum plates (201) are arranged concentrically and symmetrically so that the two working end surfaces fit together, thereby allowing the two mounting grooves (202) to butt against each other to form a mounting cavity, in which a serpentine tube (203) is installed.

7. A magnesium-based hydrogen storage device with high heat transfer efficiency as claimed in claim 6, characterized in that: A heat-conducting fluid flows in the serpentine tube (203), and the heat-conducting fluid is heat-conducting oil or hot / cold air.

8. A magnesium-based hydrogen storage device with high heat transfer efficiency as claimed in claim 6, characterized in that: A clamping ring is provided along the circumference of the outer wall surface of the single aluminum plate (201), and the energy transfer module (2) is detachably mounted on the adjacent hydrogen storage module (1) via the clamping ring.

9. A magnesium-based hydrogen storage device with high heat transfer efficiency as claimed in claim 6, characterized in that: The thickness of the aluminum plate (201) is 8 mm.

10. A magnesium-based hydrogen storage device with high heat transfer efficiency as claimed in claim 6, characterized in that: The outer diameter of the serpentine tube (203) is 6 mm.

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