Fixed hydrogen storage device

Abstract

The utility model belongs to the technical field of hydrogen storage, and particularly relates to a fixed hydrogen storage device which comprises a hydrogen storage tank and at least two heat exchange pipelines, the heat exchange pipelines are arranged in the hydrogen storage tank in a penetrating mode, the interiors of the heat exchange pipelines are hollow, heat exchange fluid flows through the heat exchange pipelines to achieve heat exchange, and the heat exchange pipelines comprise the first heat exchange pipeline and the second heat exchange pipeline. The central axis of the first heat exchange pipeline forms a first heat exchange plane, the central axis of the second heat exchange pipeline forms a second heat exchange plane, and the first heat exchange plane and the second heat exchange plane are respectively parallel to the extension direction of the hydrogen storage tank body; the first heat exchange plane intersects with the second heat exchange plane. The first heat exchange pipeline and the second heat exchange pipeline which are intersected are arranged in the hydrogen storage tank, so that heat exchange fluid flows crosswise in the hydrogen storage tank, the radiation range of the heat exchange fluid is enlarged, and the heat exchange efficiency and the hydrogen absorption and desorption rate are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydrogen storage, and in particular relates to a fixed hydrogen storage device. Background Art

[0002] In a solid-state hydrogen storage device, the process of hydrogen absorption and desorption is accompanied by the release and absorption of heat, and the efficiency of heat absorption or release has a great influence on the rate of hydrogen absorption and desorption. A fixed hydrogen storage device is fixedly placed in a hydrogen-using place such as a warehouse or factory. Compared with hydrogen storage devices used on mobile equipment such as hydrogen-powered vehicles, fixed hydrogen storage devices are rarely moved when filled with hydrogen. Therefore, the hydrogen storage capacity and volume of a fixed hydrogen storage device are large, and the corresponding hydrogen storage capacity and hydrogen absorption and desorption speed requirements are also large, and the requirements for heat transfer are also higher. Existing fixed hydrogen storage devices generally have a heat exchange structure set in the hydrogen storage tank, but the layout of the heat exchange structure is not reasonable enough, and the speed of hydrogen absorption and desorption is slow. Summary of the invention

[0003] The utility model aims to provide a fixed hydrogen storage device, optimize the heat exchange structure, and improve the heat exchange efficiency and the hydrogen absorption and desorption rate.

[0004] To achieve the above-mentioned purpose, the technical solution of the utility model is: a fixed hydrogen storage device, including a hydrogen storage tank and a heat exchange pipe passing through the hydrogen storage tank, the interior of the heat exchange pipe is hollow for allowing heat exchange fluid to flow through it to achieve heat exchange, and at least two heat exchange pipes are provided, which include a first heat exchange pipe and a second heat exchange pipe, the central axis of the first heat exchange pipe forms a first heat exchange plane, and the central axis of the second heat exchange pipe forms a second heat exchange plane, the first heat exchange plane and the second heat exchange plane are respectively parallel to the extension direction of the hydrogen storage tank body; the first heat exchange plane and the second heat exchange plane intersect.

[0005] In one embodiment, the first heat exchange plane and the second heat exchange plane are perpendicular.

[0006] In one embodiment, the first heat exchange pipe is provided with a U-shaped first bend at the bottom end of the hydrogen storage tank, and the second heat exchange pipe is provided with a U-shaped second bend at the bottom end of the hydrogen storage tank, and the second bend is located inside the first bend.

[0007] In one embodiment, the first heat exchange pipe is formed into a U-shaped structure along its extension direction, and includes a first inlet and a first outlet arranged at an open end of the hydrogen storage tank.

[0008] In one embodiment, the second heat exchange pipe is formed into a U-shaped structure along its extension direction, which includes a second inlet and a second outlet arranged at the open end of the hydrogen storage tank.

[0009] In one embodiment, it also includes a liquid inlet pipe and a liquid outlet pipe, wherein two ends of the first heat exchange pipe are respectively a first inlet and a first outlet, and two ends of the second heat exchange pipe are respectively a second inlet and a second outlet, the liquid inlet pipe is connected to the first inlet and the second inlet to provide heat exchange fluid for the heat exchange pipe, and the liquid outlet pipe is connected to the first outlet and the second outlet to discharge the heat exchange fluid in the heat exchange pipe.

[0010] In one embodiment, it further includes a plurality of heat exchange modules, and the heat exchange modules are arranged at intervals along the extension direction of the first heat exchange pipe and / or the second heat exchange pipe.

[0011] In one embodiment, the heat exchange module includes at least one heat exchange branch and heat exchange fins arranged on the outer wall of the heat exchange branch, and the heat exchange branch is fluidically connected with the first heat exchange pipe or the second heat exchange pipe, so that the heat exchange branch forms a branch for the circulation of heat exchange fluid relative to the first heat exchange pipe or the second heat exchange pipe.

[0012] In one embodiment, the heat exchange fins are made of memory alloy.

[0013] In one embodiment, the inner diameter of the heat exchange branch pipe is smaller than the inner diameter of the first heat exchange pipe or the second heat exchange pipe.

[0014] The beneficial effects of the utility model are:

[0015] 1. The utility model arranges a first heat exchange pipe and a second heat exchange pipe intersecting each other in the hydrogen storage tank, so that the heat exchange fluid cross-flows in the hydrogen storage tank, thereby increasing the radiation range of the heat exchange fluid and improving the heat exchange efficiency and the hydrogen absorption and desorption rate.

[0016] 2. The first heat exchange pipe and the second heat exchange pipe form a U-shaped bend at the bottom of the hydrogen storage tank, so that the heat exchange fluid can turn smoothly at the bottom of the hydrogen storage tank. The heat exchange fluid can maintain a high flow rate, and the U-shaped bend allows the heat exchange pipe to extend a larger range at the bottom of the hydrogen storage tank, further increasing the heat exchange range.

[0017] 3. The setting of the heat exchange module can further increase the heat exchange range and improve the heat exchange effect. The heat exchange fins made of shape memory alloy make it easier for the heat exchange branch pipe to adapt to the extrusion caused by the expansion of the hydrogen storage material, thereby improving the safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the front view of the embodiment of the utility model.

[0019] Figure 2 It is a top view of an embodiment of the utility model.

[0020] Figure 3It is an incomplete left side view of an embodiment of the utility model.

[0021] Figure 4 It is a schematic diagram of a liquid inlet pipe and a liquid outlet pipe of an embodiment of the utility model being respectively connected to a heat exchange pipe.

[0022] Figure 5 It is a schematic diagram of a heat exchange module according to an embodiment of the present utility model.

[0023] Among them: 1 hydrogen storage tank, 2 first heat exchange pipe, 201 first heat exchange plane, 21 first bend, 22 first inlet, 23 first outlet, 3 second heat exchange pipe, 301 second heat exchange plane, 31 second bend, 32 second inlet, 33 second outlet, 4 liquid inlet pipe, 5 liquid outlet pipe, 6 heat exchange module, 61 heat exchange branch pipe, 62 heat exchange fin, 7 air guide pipe, 8 valve, 9 bracket. DETAILED DESCRIPTION

[0024] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0025] See also Figures 1 to 5 As shown, the utility model discloses a fixed hydrogen storage device, including a hydrogen storage tank 1 and a heat exchange pipe passing through the hydrogen storage tank 1. The interior of the heat exchange pipe is hollow for a heat exchange fluid to flow through it to achieve heat exchange. The hydrogen storage tank 1 is also penetrated by an air guide pipe 7. The hydrogen storage tank 1 is filled with hydrogen storage materials, and the hydrogen storage materials are filled between the air guide pipe 7 and the heat exchange pipe. The hydrogen storage material is one or more of a rare earth AB5 type hydrogen storage alloy, a titanium AB2 type hydrogen storage alloy, a titanium AB type hydrogen storage alloy or a magnesium-based hydrogen storage alloy. An end cap is provided at the open end of the hydrogen storage tank 1, and a valve 8 for controlling the inlet and outlet of hydrogen and a filter plate for filtering hydrogen are provided at the end of the air guide pipe 7. A bracket 9 is provided on the lower side of the hydrogen storage tank 1 for fixing the hydrogen storage device.

[0026] See also Figures 1 to 3 As shown, in this example, there are two heat exchange pipes, namely a first heat exchange pipe 2 and a second heat exchange pipe 3. The central axis of the first heat exchange pipe 2 forms a first heat exchange plane 201, and the central axis of the second heat exchange pipe 3 forms a second heat exchange plane 301 (the first heat exchange plane 201 and the second heat exchange plane 301 are at Figure 3 The first heat exchange plane 201 and the second heat exchange plane 301 are respectively parallel to the extension direction of the hydrogen storage tank body.

[0027] The first heat exchange plane 201 and the second heat exchange plane 301 intersect, and in this example, it is further preferred that the first heat exchange plane 201 and the second heat exchange plane 301 are perpendicular, and the two intersect in the central axis area of ​​the hydrogen storage tank 1. In this example, the first heat exchange pipe 2 is arranged in the vertical direction inside the hydrogen storage tank 1, and the second heat exchange pipe 3 is arranged in the horizontal direction inside the hydrogen storage tank 1. In other embodiments, it is also feasible for the first heat exchange plane 201 and the second heat exchange plane 301 to intersect to form other angles, such as 30°, 45°, 60° or 80°. In this example, the two heat exchange planes formed by the two heat exchange pipes are perpendicular, so that the heat exchange fluid is more evenly distributed in the circumferential direction of the hydrogen storage tank, and a more uniform heat exchange can be formed. In other embodiments, the number of heat exchange pipes is not limited to two, and can be three, four or more heat exchange pipes, each heat exchange pipe correspondingly forms a heat exchange plane, and any two heat exchange planes intersect in the central axis area of ​​the hydrogen storage tank 1 to form a certain angle, and each heat exchange plane is preferably evenly distributed in the circumferential direction of the hydrogen storage tank 1 to make the heat exchange more uniform. Of course, uneven distribution of heat exchange planes is also feasible, as long as sufficient heat exchange can be achieved. Among them, the hydrogen storage tank body refers to the main structure of the hydrogen storage tank, ignoring errors and minor structural changes (such as smaller convex bulges or pits). The hydrogen storage tank body in this example is a container with one end open and the other end closed, formed by curved surfaces on the left and right sides and planes on the upper and lower sides. The open end is equipped with valves and other accessories for controlling the inlet and outlet of hydrogen. The closed end opposite to the open end is defined as the bottom of the hydrogen storage tank (the bottom of the hydrogen storage tank is at Figure 1 The extension direction of the hydrogen storage tank body is the direction between the opening end and the bottom end of the hydrogen storage tank. The central axis area of ​​the hydrogen storage tank 1 refers to a position close to the central axis of the hydrogen storage tank body and far from the side wall of the hydrogen storage tank. The distance is related to the size and shape of the hydrogen storage tank body. The specific position is determined by those skilled in the art according to the actual situation such as the size and shape of the hydrogen storage tank body.

[0028] The first heat exchange pipe 2 is provided with a U-shaped first bend 21 at the bottom of the hydrogen storage tank, and the second heat exchange pipe 3 is provided with a U-shaped second bend 31 at the bottom of the hydrogen storage tank, and the second bend 31 is located inside the first bend 21. Since the first heat exchange plane 201 and the second heat exchange plane 301 intersect, and the first heat exchange pipe 2 and the second heat exchange pipe 3 are respectively penetrated in the hydrogen storage tank 1, the second bend 21 is located inside the first bend 31 to make way for the arrangement of the two. The U-shaped first bend 21 and the second bend 31 can make the heat exchange fluid flow more smoothly in the heat exchange pipe, ensuring a larger flow rate and a better heat exchange effect.

[0029] In this example, the first heat exchange pipe 2 and the second heat exchange pipe 3 are respectively formed into a U-shaped structure along their extension direction, and the first heat exchange pipe 2 includes a first inlet 22 and a first outlet 23 arranged at the open end of the hydrogen storage tank, and the second heat exchange pipe 3 includes a second inlet 32 ​​and a second outlet 33 arranged at the open end of the hydrogen storage tank. In other embodiments, the first heat exchange pipe 2 or the second heat exchange pipe 3 or both are structures that bend back and forth multiple times in the extension direction of the hydrogen storage tank 1, so that the heat exchange pipe formed is longer and more densely distributed in the hydrogen storage tank 1, which can increase the heat exchange area. In other embodiments, multiple U-shaped pipes can be arranged at intervals along the corresponding heat exchange plane to form a heat exchange pipe.

[0030] The heat exchange device also includes a liquid inlet pipe 4 and a liquid outlet pipe 5. The liquid inlet pipe 4 is connected to the first inlet 22 and the second inlet 32 ​​to provide heat exchange fluid for the heat exchange pipe, and the liquid outlet pipe 5 is connected to the first outlet 23 and the second outlet 33 to guide the heat exchange fluid in the heat exchange pipe. Through the liquid inlet pipe 4 and the liquid outlet pipe 5, the heat exchange fluid in multiple heat exchange pipes flows out of the pipes, which simplifies the pipe structure and makes the initial temperature of the heat exchange fluid flowing into each heat exchange pipe the same, so that the heat exchange is more uniform.

[0031] See also Figure 1 , Figure 2 and Figure 5 As shown, in order to further improve the heat exchange effect, the first heat exchange pipe 2 and the second heat exchange pipe 3 are respectively provided with a plurality of heat exchange modules 6 arranged at intervals along the extension direction thereof. The first heat exchange pipe 2 is provided with eight heat exchange modules 6, and the second heat exchange pipe 3 is provided with six heat exchange modules 6. The heat exchange module 6 includes a heat exchange branch pipe 61 and a heat exchange fin 62 arranged on the outer wall of the heat exchange branch pipe 61. The heat exchange branch pipe 61 is fluidly connected with the first heat exchange pipe 2 or the second heat exchange pipe 3, so that the heat exchange branch pipe 61 forms a branch for the circulation of the heat exchange fluid relative to the first heat exchange pipe 2 or the second heat exchange pipe 3. Each heat exchange module 6 in this example is provided with two heat exchange branches 61, and the two heat exchange branches are arranged on opposite sides of the heat exchange pipe. In other embodiments, it is also feasible to provide only one heat exchange branch pipe 61 for a heat exchange module 6, or it is also feasible to provide more than two heat exchange branches 61 for a heat exchange module 6. When more than two heat exchange branches 61 are provided, it is preferred that each heat exchange branch pipe 61 is evenly arranged at intervals around the circumference of the heat exchange pipe. The more heat exchange branches 61 there are, the larger the heat exchange area is, which is beneficial to improving the heat exchange effect. However, too many heat exchange branches 61 will cause the heat exchange fluid to be too dispersed and weaken the heat exchange effect. Therefore, in this example, two heat exchange branches 61 are selected for each heat exchange module 6 on the basis of fully considering the heat exchange area and the heat exchange fluid. The inner diameter of the heat exchange branch 61 in this example is smaller than the inner diameter of each heat exchange pipe, so that each heat exchange branch 61 has a heat exchange fluid flowing through it.

[0032] The heat exchange fins 62 are made of shape memory alloy. When the hydrogen storage material expands by absorbing hydrogen, the heat exchange fins 62 absorb the stress generated by the expansion of the hydrogen storage material, buffering the squeezing of the inner wall of the hydrogen storage tank and the heat exchange pipe during the hydrogen absorption process; when the hydrogen storage material contracts by releasing hydrogen and releases the squeezing of the heat dissipation fins 62, the surrounding heat is absorbed during the dehydrogenation process to reduce the temperature of the heat dissipation fins, and the heat exchange fins 62 made of shape memory alloy return to their original state.

[0033] In this example, the first heat exchange pipe 2 and the second heat exchange pipe 3 are respectively provided with a plurality of heat exchange modules 6. In other embodiments, the heat exchange module 6 may be provided in one of the first heat exchange pipe 2 or the second heat exchange pipe 3.

[0034] The heat exchange pipe and the heat exchange branch pipe 61 are made of stainless steel, with fast heat transfer speed and high heat exchange efficiency. The heat exchange medium in this example is water, and high-temperature heat exchange fluid or low-temperature heat exchange fluid is introduced into the heat exchange pipe according to the requirements of heat absorption and release.

[0035] The working process of the utility model is as follows: when the hydrogen storage device needs to release hydrogen, the process needs to absorb heat, and hot water flows into the first heat exchange pipe 2 and the second heat exchange pipe 3 through the liquid inlet pipe 4 to heat the hydrogen storage material, and then flows out through the liquid outlet pipe 5. The structural design of the heat exchange pipe and the heat exchange module through which the heat exchange fluid flows effectively increases the contact area and contact time between the hydrogen storage material and the hot water, thereby promoting the release of hydrogen from the hydrogen storage device. Conversely, when the hydrogen storage device needs to absorb hydrogen, cooled water is introduced into the liquid inlet pipe 4, and after the cold water flows through the first heat exchange pipe 2 and the second heat exchange pipe 3, the hydrogen storage material is fully cooled, thereby promoting the absorption of hydrogen by the hydrogen storage device.

[0036] Although the present invention is specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that the remaining undescribed portions are prior art, and that various changes made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims shall fall within the scope of protection of the present invention.

Claims

1. A fixed hydrogen storage device, comprising a hydrogen storage tank and a heat exchange pipe passing through the hydrogen storage tank, wherein the heat exchange pipe is hollow inside for allowing a heat exchange fluid to flow therethrough to achieve heat exchange, characterized in that: There are at least two heat exchange pipes, including a first heat exchange pipe and a second heat exchange pipe. The central axis of the first heat exchange pipe forms a first heat exchange plane, and the central axis of the second heat exchange pipe forms a second heat exchange plane. The first heat exchange plane and the second heat exchange plane are respectively parallel to the extension direction of the hydrogen storage tank body; the first heat exchange plane and the second heat exchange plane intersect.

2. A fixed hydrogen storage device according to claim 1, characterized in that: The first heat exchange plane and the second heat exchange plane are perpendicular.

3. A fixed hydrogen storage device according to claim 1, characterized in that: The first heat exchange pipe is provided with a U-shaped first bend at the bottom end of the hydrogen storage tank, and the second heat exchange pipe is provided with a U-shaped second bend at the bottom end of the hydrogen storage tank, and the second bend is located inside the first bend.

4. A fixed hydrogen storage device according to claim 3, characterized in that: The first heat exchange pipe is formed into a U-shaped structure along its extension direction, and includes a first inlet and a first outlet arranged at the open end of the hydrogen storage tank.

5. A fixed hydrogen storage device according to claim 3, characterized in that: The second heat exchange pipe is formed into a U-shaped structure along its extension direction, and includes a second inlet and a second outlet arranged at the open end of the hydrogen storage tank.

6. A fixed hydrogen storage device according to claim 1, characterized in that: It also includes a liquid inlet pipe and a liquid outlet pipe, wherein two ends of the first heat exchange pipe are respectively a first inlet and a first outlet, and two ends of the second heat exchange pipe are respectively a second inlet and a second outlet, the liquid inlet pipe is connected to the first inlet and the second inlet to provide heat exchange fluid for the heat exchange pipe, and the liquid outlet pipe is connected to the first outlet and the second outlet to discharge the heat exchange fluid in the heat exchange pipe.

7. A fixed hydrogen storage device according to claim 1, characterized in that: It also includes a plurality of heat exchange modules, which are arranged at intervals along the extension direction of the first heat exchange pipe and / or the second heat exchange pipe.

8. A fixed hydrogen storage device according to claim 7, characterized in that: The heat exchange module includes at least one heat exchange branch and heat exchange fins arranged on the outer wall of the heat exchange branch. The heat exchange branch is fluidically connected with the first heat exchange pipe or the second heat exchange pipe, so that the heat exchange branch forms a branch for the circulation of heat exchange fluid relative to the first heat exchange pipe or the second heat exchange pipe.

9. A fixed hydrogen storage device according to claim 8, characterized in that: The heat exchange fins are made of memory alloy.

10. A fixed hydrogen storage device according to claim 8, characterized in that: The inner diameter of the heat exchange branch pipe is smaller than the inner diameter of the first heat exchange pipe or the second heat exchange pipe.

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