Hydrogen storage and heat storage coupling system
By designing a hydrogen storage and thermal storage coupling system, the heat generated during hydrogen absorption is stored in the thermal storage device and released during hydrogen release, thus solving the problem of high energy consumption of magnesium-based materials and achieving efficient energy utilization and reduced energy consumption.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HYDREXIA (SHANGHAI) CO LTD
- Filing Date
- 2025-06-09
- Publication Date
- 2026-06-19
AI Technical Summary
Magnesium-based materials typically have hydrogen absorption and desorption temperatures above 300°C, and the enthalpy values of hydrogen absorption and desorption reactions are high. In particular, the energy consumption required for hydrogen desorption is high, which limits their application.
Design a hydrogen storage and thermal storage coupling system, including a solid hydrogen storage device, a thermal storage device, a circulating pump, a three-way valve, and a heating device. The system stores the heat generated during hydrogen absorption in the thermal storage device through a heat transfer medium and releases the heat during hydrogen release, thereby reducing the total energy consumption of the hydrogen release process.
It effectively recovers waste heat during hydrogen absorption, reduces energy consumption during hydrogen release, has a simple system that does not require a separate heat exchanger, and improves energy utilization.
Smart Images
Figure CN224381246U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of hydrogen storage technology, and in particular to a hydrogen storage and thermal storage coupling system. Background Technology
[0002] With the increasing global demand for clean energy, hydrogen energy has become an important alternative to fossil fuels due to its high energy density and zero emissions. Magnesium-based solid-state hydrogen storage technology is considered a potential solution for hydrogen storage and transportation due to its high hydrogen storage density and safety. However, the hydrogen absorption and desorption temperatures of magnesium-based materials are typically above 300℃, and the enthalpy of the hydrogen absorption and desorption reactions is relatively high (approximately 75 KJ / mol H₂). 2 Its application is limited, especially since the energy required for hydrogen release is relatively high. Utility Model Content
[0003] The purpose of this application is to provide a hydrogen storage and thermal storage coupling system, which to some extent solves the technical problems existing in the prior art where the hydrogen absorption and desorption temperature of magnesium-based materials is usually above 300°C, the enthalpy of the hydrogen absorption and desorption reaction is high, and the energy consumption required for hydrogen desorption is particularly high, thus limiting its application.
[0004] This application provides a hydrogen storage and thermal storage coupling system, including: a solid hydrogen storage device, a thermal storage device, a circulating pump, a three-way valve, and a heating device; wherein, the solid hydrogen storage device forms a phase-separated first chamber and a second chamber, and the first chamber is provided with a magnesium-based hydrogen storage material, and the second chamber is provided with a thermally conductive medium; the thermal storage device forms a phase-separated third chamber and a fourth chamber, and the third chamber is provided with a thermal storage medium, the fourth chamber is provided with a thermally conductive medium, and the fourth chamber is connected to the second chamber;
[0005] The three-way valve has three connecting ports, and the first connecting port is connected to the fourth chamber via the circulating pump, the second connecting port is connected to the inlet end of the heating device, and the third connecting port is connected to the second chamber; the outlet end of the heating device is connected to the second chamber.
[0006] In the above technical solution, the third connecting port is further connected to the second chamber through a first pipeline, and the first pipeline includes a first branch pipeline and a second branch pipeline connected to each other, and the first branch pipeline is located close to the three-way valve.
[0007] The outlet end of the heating device is connected to the second chamber through a second pipeline, and the second pipeline includes a third branch pipeline and a fourth branch pipeline connected to each other, and the third branch pipeline is located close to the heating device; wherein the second branch pipeline and the fourth branch pipeline are the same pipeline, and a first valve is provided on the shared pipeline.
[0008] In any of the above technical solutions, the hydrogen storage and thermal storage coupling system further includes a temperature sensor, and the temperature sensor is disposed on the pipeline connecting the outlet end of the heating device to the second chamber.
[0009] In any of the above technical solutions, the hydrogen storage and thermal storage coupling system further includes a first insulation layer, the solid hydrogen storage device, the thermal storage device, the circulating pump, the three-way valve and the heating device are connected by a pipeline, and the first insulation layer is wrapped around the outside of the pipeline.
[0010] In any of the above technical solutions, the hydrogen storage and thermal storage coupling system further includes a second insulation layer, and the second insulation layer is wrapped around the outside of the thermal storage device.
[0011] In any of the above technical solutions, a second valve is further provided on the pipeline connecting the fourth chamber of the thermal storage device and the second chamber of the solid hydrogen storage device.
[0012] In any of the above technical solutions, the hydrogen storage and thermal storage coupling system further includes a gas-liquid separator, and the gas-liquid separator is connected between the fourth chamber and the circulating pump.
[0013] In any of the above technical solutions, the hydrogen storage and thermal storage coupling system further includes an expansion tank, and the expansion tank is connected to the gas-liquid separator.
[0014] In any of the above technical solutions, a third valve is further provided on the pipeline connecting the fourth chamber to the gas-liquid separator.
[0015] In any of the above technical solutions, the hydrogen storage and thermal storage coupling system further includes a hydrogen charging and discharging pipeline, and the hydrogen charging and discharging pipeline is connected to the first chamber of the solid hydrogen storage device.
[0016] In any of the above technical solutions, the hydrogen storage and thermal storage coupling system further includes a fourth valve, and the fourth valve is disposed in the hydrogen charging and discharging pipeline.
[0017] In any of the above technical solutions, the hydrogen storage and thermal storage coupling system further includes a filter, and the filter is disposed in the hydrogen charging and discharging pipeline.
[0018] Compared with the prior art, the beneficial effects of this application are as follows:
[0019] This system achieves efficient coupling between a solid-state hydrogen storage device and a thermal storage device. It can effectively store the heat generated by the hydrogen storage material in the solid-state hydrogen storage device during hydrogen absorption in the thermal storage device. At the same time, when heat is needed for hydrogen release, the heat in the thermal storage device can be released. In other words, it can effectively recover the waste heat during hydrogen absorption, thereby reducing the total energy consumption of the hydrogen release process and greatly reducing the system's energy consumption. Moreover, this system does not require a separate heat exchanger; it only requires the circulation of heat transfer oil, which exchanges heat with the thermal storage material in the thermal storage device. The system is simple. In addition, this system is equipped with a heating device, which can preheat the system and also play a role in supplementing heat during hydrogen release. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the structure of the hydrogen storage and thermal storage coupling system provided in the embodiments of this application.
[0022] Figure label:
[0023] 1-Solid hydrogen storage device, 2-Heat storage device, 3-Gas-liquid separator, 4-Expansion tank, 5-Circulation pump, 6-Three-way valve, 61-First connection port, 62-Second connection port, 63-Third connection port, 7-Heating device, 71-Inlet end, 72-Outlet end, 8-First branch pipeline, 9-Third branch pipeline, 10-Common pipeline, 11-First insulation layer, 12-Hydrogen charging and discharging pipeline, 13-Fourth valve, 14-Filter, 15-First valve, 16-Second valve, 17-Third valve. Detailed Implementation
[0024] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.
[0025] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.
[0026] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0027] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0028] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0029] The following reference Figure 1 This application describes a hydrogen storage and thermal storage coupling system according to some embodiments.
[0030] See Figure 1 As shown, an embodiment of this application provides a hydrogen storage and thermal storage coupling system, including: a solid hydrogen storage device 1, a thermal storage device 2, a circulating pump 5, a three-way valve 6, and a heating device 7; wherein, the solid hydrogen storage device 1 forms a phase-separated first chamber and a second chamber, and a magnesium-based hydrogen storage material is disposed in the first chamber, and a thermally conductive medium is disposed in the second chamber; the thermal storage device 2 forms a phase-separated third chamber and a fourth chamber, and a thermally conductive medium is disposed in the third chamber, and the fourth chamber is connected to the second chamber;
[0031] The three-way valve 6 has three connecting ports. The first connecting port is connected to the fourth chamber via the circulating pump 5, the second connecting port is connected to the inlet end 71 of the heating device 7, and the third connecting port is connected to the second chamber. The outlet end 72 of the heating device 7 is connected to the second chamber.
[0032] Based on the structure described above, this application provides a hydrogen storage and thermal storage coupling system, the working process of which is roughly as follows:
[0033] In the initial stage, firstly, adjust the three-way valve 6 to connect the first and second ports 61 and 62, while disconnecting the other ports. This means that the heat transfer oil needs to be heated by the heating device 7, i.e., preheated, before flowing into the second chamber. Instead, it will not flow directly from the third port 63 of the three-way valve 6 to the second chamber of the solid hydrogen storage device 1. The heating device 7 is used to preheat the heat transfer oil, heating the entire system to the minimum temperature at which the hydrogen storage material, such as magnesium-based material, can absorb hydrogen. Then, turn off the heating device 7 and adjust the three-way valve 6 to connect the first and third ports 61 and 63, while disconnecting the other ports. This means that the heat transfer oil no longer needs to be heated by the heating device 7, but flows directly from the third port 63 of the three-way valve 6 to the second chamber of the solid hydrogen storage device 1. Open the hydrogen charging pipeline valve to start charging hydrogen.
[0034] During the hydrogen charging process, the hydrogen storage material, such as magnesium-based material, stored in the solid-state hydrogen storage device 1 generates a large amount of heat. This system stores this heat in the thermal storage device 2. The thermal storage device 2 contains thermal storage material, which can be a solid thermal storage device, a molten salt thermal storage device, or a phase change thermal storage device, etc.
[0035] When the solid hydrogen storage device 1 needs to release hydrogen, the hydrogen release valve is opened, and the system is started at the same time. During hydrogen release, the hydrogen storage material in the solid hydrogen storage device 1, such as magnesium-based material, will cool down rapidly due to the heat absorption of hydrogen release. At this time, the heat originally stored in the heat storage device 2 is continuously supplied through the circulation of heat transfer oil to achieve continuous hydrogen release. It should be noted that during the hydrogen release process, the heat transfer oil can also be heated by adjusting the three-way valve 6 to play a role in heat supplementation. The specific choice depends on the actual needs.
[0036] As can be seen, this system achieves efficient coupling between the solid-state hydrogen storage device 1 and the heat storage device 2. It can effectively store the heat generated by the hydrogen storage material in the solid-state hydrogen storage device 1 during hydrogen absorption in the heat storage device 2. At the same time, when heat is needed for hydrogen release, the heat in the heat storage device 2 can be released. In other words, it can effectively recover the waste heat during the hydrogen absorption process, thereby reducing the total energy consumption of the hydrogen release process and greatly reducing the energy consumption of the system. Moreover, this system does not require a separate heat exchanger, only the circulation of heat transfer oil. The heat transfer oil will exchange heat with the heat storage material in the heat storage device 2. The system is simple. In addition, the system is equipped with a heating device 7, which can preheat the system and also play a role in supplementing heat during the hydrogen release process.
[0037] Furthermore, preferably, the solid hydrogen storage device 1 can be a magnesium-based hydrogen storage tube. Of course, it is not limited to this type of hydrogen storage container and can also be other hydrogen storage devices.
[0038] In this embodiment, preferably, as follows: Figure 1As shown, the third connecting port is connected to the second chamber through the first pipeline, and the first pipeline includes a first branch pipeline 8 and a second branch pipeline connected to each other, and the first branch pipeline 8 is located near the three-way valve 6.
[0039] The outlet end 72 of the heating device 7 is connected to the second chamber through a second pipeline, and the second pipeline includes a third branch pipeline 9 and a fourth branch pipeline connected to each other, and the third branch pipeline 9 is located close to the heating device 7; the second branch pipeline and the fourth branch pipeline are the same pipeline, that is, a common pipeline 10, and a first valve 15 is provided on this common pipeline 10, which can control whether the outlet end 72 of the second chamber is connected to the heating device 7 or the third connecting port 63 of the three-way valve 6, thus making it more controllable.
[0040] As described above, designing the second and fourth branch pipelines as a single pipeline satisfies connectivity requirements while saving on pipeline investment, reducing costs, minimizing space requirements, and facilitating maintenance. However, this is not the only option; the second and fourth branch pipelines can also be two independent pipelines, depending on actual needs. When the second and fourth branch pipelines are two independent pipelines, two corresponding connection ports can be provided on the solid-state hydrogen storage device 1. Alternatively, only one connection port can be provided on the solid-state hydrogen storage device 1, allowing the aforementioned second and fourth branch pipelines to be connected to this connection port via a three-way valve 6.
[0041] In this embodiment, preferably, the hydrogen storage and thermal storage coupling system further includes a temperature sensor (not shown in the figure), and the temperature sensor is disposed on the pipeline connecting the outlet end 72 of the heating device 7 and the second chamber.
[0042] As can be seen from the structure described above, during the initial startup phase of this system, the heating device 7 is required to preheat the heat transfer oil. During this process, the temperature of the heat transfer oil at the outlet 72 of the heating device 7 can be monitored at all times by a temperature sensor to see if it reaches the working value. If it does, the three-way valve 6 can be adjusted to connect the first connecting port 61 and the third connecting port 63, while disconnecting the other connecting ports. In other words, the heating device 7 is only used for preheating during the initial startup. During normal operation, the heat generated during the hydrogen charging process is directly used to store heat in the heat storage device 2. When releasing hydrogen, the heat in the heat storage device 2 is released, resulting in less power consumption. That is, the heat storage device 2 recovers and utilizes the heat generated during the hydrogen charging process and then releases it when releasing hydrogen, thus achieving higher energy utilization.
[0043] It should also be noted that the solid hydrogen storage device 1, the thermal storage device 2, and the heating device 7 are also equipped with temperature sensors for monitoring temperature.
[0044] In this embodiment, preferably, as follows: Figure 1As shown, the hydrogen storage and thermal storage coupling system also includes a first insulation layer 11. The solid hydrogen storage device 1, the thermal storage device 2, the circulating pump 5, the three-way valve 6, and the heating device 7 are connected by pipelines, and the first insulation layer 11 is wrapped around the outside of the pipelines.
[0045] As can be seen from the structure described above, the first insulation layer 11 serves to insulate the heat transfer oil flowing in the system pipeline, ensuring that the temperature loss in the system is minimized.
[0046] In this embodiment, preferably, as follows: Figure 1 As shown, the hydrogen storage and thermal storage coupling system also includes a second insulation layer, which is wrapped around the outside of the thermal storage device 2.
[0047] As can be seen from the structure described above, the second insulation layer serves to insulate the heat storage device 2 and minimize heat loss during operation.
[0048] In this embodiment, preferably, as follows: Figure 1 As shown, a second valve 16 is installed on the pipeline connecting the fourth chamber of the thermal storage device 2 and the second chamber of the solid hydrogen storage device 1, which can control whether the thermal storage device 2 and the solid hydrogen storage device 1 are connected or not, thus making it more controllable.
[0049] In this embodiment, preferably, as follows: Figure 1 As shown, the hydrogen storage and thermal storage coupling system also includes a gas-liquid separator 3, which is connected between the fourth chamber and the circulating pump 5.
[0050] Further, preferably, such as Figure 1 As shown, the hydrogen storage and thermal storage coupling system also includes an expansion tank 4, and the expansion tank 4 is connected to the gas-liquid separator 3.
[0051] As can be seen from the structure described above, the heat transfer oil will expand during the heating process, so an expansion tank 4 is required to receive the heat transfer oil overflowing from the system. The aforementioned gas-liquid separator 3 can also effectively separate the evaporated water and liquid heat transfer oil, avoid pressure fluctuations in the heat transfer oil in the system, and improve the safety and reliability of the system operation.
[0052] It should be noted that the aforementioned gas-liquid separator 3 and expansion tank 4 may not be required; the choice depends on the actual needs.
[0053] In this embodiment, preferably, as follows: Figure 1 As shown, a third valve 17 is installed on the pipeline connecting the fourth chamber to the gas-liquid separator 3, which can control whether the fourth chamber is connected to the gas-liquid separator 3, thus providing greater controllability. It should also be noted that the first valve 15, the second valve 16, and the third valve 17 mentioned above can also isolate a certain device or pipeline for easy maintenance or replacement.
[0054] In this embodiment, preferably, as follows: Figure 1 As shown, the hydrogen storage and thermal storage coupling system also includes a hydrogen charging and discharging pipeline 12, which is connected to the first chamber of the solid hydrogen storage device 1.
[0055] As can be seen from the structure described above, the hydrogen charging and discharging pipeline 12 is used to charge or discharge hydrogen into the solid hydrogen storage device 1. Moreover, since a single pipeline is used, material costs are saved and maintenance is convenient.
[0056] In this embodiment, preferably, as follows: Figure 1 As shown, the hydrogen storage and thermal storage coupling system also includes a fourth valve 13, and the fourth valve 13 is located in the hydrogen charging and discharging pipeline 12.
[0057] As can be seen from the structure described above, the hydrogen charging / discharging pipeline 12 can be opened or closed by using valves, which provides greater controllability.
[0058] In this embodiment, preferably, as follows: Figure 1 As shown, the hydrogen storage and thermal storage coupling system also includes a filter 14, and the filter 14 is disposed in the hydrogen charging and discharging pipeline 12.
[0059] As can be seen from the structure described above, the hydrogen gas is filtered using filter 14 to ensure the purity of the hydrogen gas.
[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A hydrogen storage and thermal storage coupled system, characterized in that, include: A solid-state hydrogen storage device, a thermal storage device, a circulating pump, a three-way valve, and a heating device are provided. The solid-state hydrogen storage device comprises a first chamber and a second chamber separated by phase, wherein a magnesium-based hydrogen storage material is disposed in the first chamber, and a thermally conductive medium is disposed in the second chamber. The thermal storage device comprises a third chamber and a fourth chamber separated by phase, wherein a thermal storage medium is disposed in the third chamber, a thermally conductive medium is disposed in the fourth chamber, and the fourth chamber is connected to the second chamber. The three-way valve has three connecting ports, and the first connecting port is connected to the fourth chamber via the circulating pump, the second connecting port is connected to the inlet end of the heating device, and the third connecting port is connected to the second chamber; the outlet end of the heating device is connected to the second chamber.
2. The hydrogen storage and thermal storage coupling system according to claim 1, characterized in that, The third connection port is connected to the second chamber through a first pipeline, and the first pipeline includes a first branch pipeline and a second branch pipeline connected to each other, and the first branch pipeline is located close to the three-way valve. The outlet end of the heating device is connected to the second chamber through a second pipeline, and the second pipeline includes a third branch pipeline and a fourth branch pipeline connected to each other, and the third branch pipeline is located close to the heating device; wherein the second branch pipeline and the fourth branch pipeline are the same pipeline, and a first valve is provided on the shared pipeline.
3. The hydrogen storage and thermal storage coupling system according to claim 1, characterized in that, The hydrogen storage and thermal storage coupling system also includes a temperature sensor, which is located on the pipeline connecting the outlet end of the heating device to the second chamber.
4. The hydrogen storage and thermal storage coupling system according to claim 1, characterized in that, The hydrogen storage and thermal storage coupling system also includes a first insulation layer. The solid hydrogen storage device, the thermal storage device, the circulating pump, the three-way valve, and the heating device are connected by pipelines, and the first insulation layer is wrapped around the outside of the pipelines.
5. The hydrogen storage and thermal storage coupling system according to claim 1, characterized in that, The hydrogen storage and thermal storage coupling system further includes a second insulation layer, which is wrapped around the exterior of the thermal storage device; and / or A second valve is installed on the pipeline connecting the fourth chamber of the thermal storage device and the second chamber of the solid hydrogen storage device.
6. The hydrogen storage and thermal storage coupling system according to claim 1, characterized in that, The hydrogen storage and thermal storage coupling system also includes a gas-liquid separator, which is connected between the fourth chamber and the circulating pump.
7. The hydrogen storage and thermal storage coupling system according to claim 6, characterized in that, The hydrogen storage and thermal storage coupling system further includes an expansion tank, which is connected to the gas-liquid separator; and / or A third valve is installed on the pipeline connecting the fourth chamber to the gas-liquid separator.
8. The hydrogen storage and thermal storage coupled system according to any one of claims 1 to 7, characterized in that, The hydrogen storage and thermal storage coupling system also includes a hydrogen charging and discharging pipeline, and the hydrogen charging and discharging pipeline is connected to the first chamber of the solid hydrogen storage device.
9. The hydrogen storage and thermal storage coupling system according to claim 8, characterized in that, The hydrogen storage and thermal storage coupling system also includes a fourth valve, which is located in the hydrogen charging and discharging pipeline.
10. The hydrogen storage and thermal storage coupling system according to claim 8, characterized in that, The hydrogen storage and thermal storage coupling system also includes a filter, and the filter is disposed in the hydrogen charging and discharging pipeline.