Solid hydrogen storage device with heat exchange adjusting structure

Abstract

The utility model discloses a solid hydrogen storage device with a heat exchange adjusting structure, and relates to the technical field of solid hydrogen storage equipment. The solid hydrogen storage device with the heat exchange adjusting structure comprises a hydrogen storage tank body, a heat exchange assembly, a flow adjusting valve, a temperature sensor and a controller, the hydrogen storage tank body provides a sealed hydrogen storage environment, the heat exchange assembly achieves heat exchange through a circulating medium, the temperature sensor monitors the temperature in real time and transmits data to the controller, and the controller controls the flow adjusting valve. The controller intelligently regulates and controls the opening degree of the flow regulating valve to form a closed-loop temperature control system; through a closed-loop system composed of the temperature sensor, the controller and the flow regulating valve, the internal temperature of the hydrogen storage tank body can be controlled within an extremely small fluctuation range, the situation that the hydrogen absorption and desorption performance of a hydrogen storage material is affected due to the fact that the temperature is too high or too low is avoided, it is guaranteed that hydrogen storage and hydrogen release reactions are carried out under the optimal temperature condition, and the hydrogen storage efficiency and the hydrogen storage amount are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of solid hydrogen storage equipment technology, specifically a solid hydrogen storage device with a heat exchange regulation structure. Background Technology

[0002] Against the backdrop of the global energy structure accelerating its transformation towards low-carbon and clean energy, hydrogen energy, with its high energy density and zero-carbon characteristics (its combustion product being only water), has become a highly promising strategic energy carrier. Solid-state hydrogen storage technology, due to its advantages such as high hydrogen storage density, good safety, and convenient transportation, is regarded as the core development direction for large-scale hydrogen energy storage and application in the future.

[0003] Publication No. CN214500868U discloses a heat exchange solid-state hydrogen storage device, relating to the field of solid-state hydrogen storage equipment technology. It includes a heat exchange plate with flow channels, a solid-state hydrogen storage material bonded to the heat exchange plate, and a heat transfer medium conduit connecting to the flow channels of the heat exchange plate. A heat transfer medium flows through the conduit and into the flow channels, heating or cooling the heat exchange plate, which in turn heats or cools the solid-state hydrogen storage material bonded to the heat exchange plate, promoting hydrogen release or absorption by the solid-state hydrogen storage material. Through the above heating or cooling method, heat exchange of the solid-state hydrogen storage material is achieved promptly and sufficiently, thereby enabling the hydrogen absorption / desorption rate and response time of the solid-state hydrogen storage material to reach the required levels.

[0004] As shown in the above technical solution, although the device achieves temperature control of solid hydrogen storage materials through the heat exchange design of heat exchange plate and heat transfer medium, and improves the thermal management efficiency of hydrogen absorption and desorption process to a certain extent, it cannot monitor the temperature change of hydrogen storage materials in real time and dynamically adjust the heat exchange power. For example, when the local temperature of the hydrogen storage material exceeds the optimal operating range due to hydrogen absorption and heat release, the device cannot automatically identify the temperature abnormality and adjust the flow rate of the heat transfer medium. The continuous increase in temperature may cause material phase change deactivation or a sudden drop in reaction rate. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a solid hydrogen storage device with a heat exchange adjustment structure, which solves the problem that the heat exchange structure cannot be adjusted according to real-time conditions.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a solid hydrogen storage device with a heat exchange regulation structure, comprising:

[0007] A hydrogen storage tank, which is used to contain solid hydrogen storage material and provide a sealed hydrogen storage environment;

[0008] A heat exchange component is installed on the hydrogen storage tank. The heat exchange component is used to exchange heat with the hydrogen storage material through a circulating heat exchange medium in order to regulate the temperature change during the hydrogen storage process.

[0009] A flow regulating valve is fixedly installed on the heat exchange assembly. The flow regulating valve is used to dynamically adjust the flow rate of the heat exchange medium according to temperature feedback in order to achieve precise temperature control.

[0010] A temperature sensor is fixedly installed inside the hydrogen storage tank and is used to monitor the temperature of the hydrogen storage material in real time.

[0011] The controller is fixedly installed on the outer wall of the hydrogen storage tank. The flow regulating valve and the temperature sensor are both electrically connected to the controller. The controller is used to intelligently control the opening degree of the flow regulating valve based on the data from the temperature sensor, forming a closed-loop temperature control system.

[0012] Preferably, the heat exchange assembly includes a heat exchange pipe, which is fixedly installed inside the hydrogen storage tank. A heat exchange medium is provided inside the heat exchange pipe. An inlet pipe and an outlet pipe connected to the heat exchange pipe are fixedly installed on the hydrogen storage tank. The flow regulating valve is fixedly installed on the inlet pipe.

[0013] Preferably, the hydrogen storage tank includes an outer tank and an inner tank, with a vacuum insulation layer provided between the outer tank and the inner tank, and the heat exchange pipe is fixedly installed on the inner tank.

[0014] Preferably, the heat exchange pipe is spirally wound and installed on the outer wall of the inner tank.

[0015] Preferably, multiple baffles are fixedly installed on the inner wall of the inner tank.

[0016] Preferably, the inner wall of the inner tank and the baffle are both made of hydrogen storage material.

[0017] Preferably, an air inlet pipe and an air outlet pipe connected to the inner tank are fixedly installed on the outer tank, and a valve is fixedly installed on the air inlet pipe.

[0018] Preferably, a first connector and a second connector are rotatably mounted on the liquid inlet pipe and the air inlet pipe, respectively. A first threaded groove and a second threaded groove are respectively provided on the liquid outlet pipe and the air outlet pipe. The first connector is movably connected to the liquid outlet pipe through the first threaded groove, and the second connector is threadedly connected to the air outlet pipe through the second threaded groove.

[0019] Beneficial effects

[0020] This invention provides a solid hydrogen storage device with a heat exchange regulation structure. Compared with the prior art, it has the following advantages:

[0021] 1. This solid-state hydrogen storage device with a heat exchange regulation structure can control the internal temperature of the hydrogen storage tank within a very small fluctuation range through a closed-loop system composed of a temperature sensor, a controller, and a flow regulating valve. This avoids the hydrogen absorption and release performance of the hydrogen storage material being affected by excessively high or low temperatures, ensuring that the hydrogen storage and release reactions take place under optimal temperature conditions, and significantly improving hydrogen storage efficiency and storage capacity.

[0022] 2. This solid hydrogen storage device with a heat exchange regulation structure, through the setting of the first and second connecting parts, enables the device to have flexible modular expansion characteristics. Users can quickly connect multiple hydrogen storage tanks in series according to actual hydrogen storage needs, thereby multiplying the total hydrogen storage capacity. This avoids the cumbersome process of redesigning and manufacturing large-capacity single tanks required by traditional hydrogen storage equipment, and significantly reduces equipment upgrade costs and time costs. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0024] Figure 2 This utility model Figure 1 A magnified view of a section at point A in the middle;

[0025] Figure 3 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0026] Figure 4 This utility model Figure 3 A magnified view of a section at point B in the middle;

[0027] Figure 5 This is a cross-sectional schematic diagram of the present invention;

[0028] Figure 6 This is a cross-sectional schematic diagram of the inner tank in this utility model.

[0029] In the diagram: 1. Hydrogen storage tank; 101. Outer tank; 102. Inner tank; 103. Vacuum insulation layer; 2. Heat exchange assembly; 201. Heat exchange pipe; 202. Liquid inlet pipe; 203. Liquid outlet pipe; 3. Flow regulating valve; 4. Temperature sensor; 5. Controller; 6. Baffle; 7. Gas inlet pipe; 8. Gas outlet pipe; 9. Valve; 10. First connector; 11. Second connector; 12. First threaded groove; 13. Second threaded groove. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] See Figures 1-6 This utility model provides the following two technical solutions:

[0032] First embodiment: A solid hydrogen storage device with a heat exchange regulation structure, comprising:

[0033] The hydrogen storage tank 1 includes an outer tank 101 and an inner tank 102. A vacuum insulation layer 103 is provided between the outer tank 101 and the inner tank 102. The hydrogen storage tank 1 is used to contain solid hydrogen storage materials and provide a sealed hydrogen storage environment.

[0034] Heat exchange assembly 2 is installed on hydrogen storage tank 1. Heat exchange assembly 2 includes heat exchange pipe 201, which is fixedly installed inside hydrogen storage tank 1. Heat exchange medium is provided inside heat exchange pipe 201. Inlet pipe 202 and outlet pipe 203 connected to heat exchange pipe 201 are fixedly installed on hydrogen storage tank 1. Flow regulating valve 3 is fixedly installed on inlet pipe 202. Heat exchange pipe 201 is spirally wound on the outer wall of inner tank 102. Heat exchange assembly 2 is used to exchange heat with hydrogen storage material through circulating heat exchange medium in order to regulate temperature changes during hydrogen storage.

[0035] The flow regulating valve 3 is fixedly installed on the heat exchange component 2. The flow regulating valve 3 is used to dynamically adjust the flow rate of the heat exchange medium according to the temperature feedback in order to achieve precise temperature control.

[0036] Temperature sensor 4 is fixedly installed inside hydrogen storage tank 1. Temperature sensor 4 is used to monitor the temperature of hydrogen storage material in real time.

[0037] The controller 5 is fixedly installed on the outer wall of the hydrogen storage tank 1. The flow regulating valve 3 and the temperature sensor 4 are both electrically connected to the controller 5. The controller 5 is used to intelligently control the opening degree of the flow regulating valve 3 based on the data from the temperature sensor 4, forming a closed-loop temperature control system.

[0038] Solid hydrogen storage materials release a large amount of heat during hydrogen absorption, such as when metal hydrides react with hydrogen to form metal hydrides, converting chemical energy into heat energy. During hydrogen release, heat needs to be absorbed to break chemical bonds, promoting the decomposition of metal hydrides or desorbing physically adsorbed hydrogen. The hydrogen storage tank 1 houses the solid hydrogen storage material, providing space for the reaction, and its sealed environment ensures no hydrogen leakage. The heat exchange pipe 201 of the heat exchange component 2 is spirally wound around the outer wall of the inner tank 102, increasing the contact area with the inner tank 102. When the hydrogen storage material absorbs hydrogen and releases heat, the heat is conducted through the inner tank 102 to the heat exchange pipe 201, where the heat exchange medium absorbs heat and its temperature rises. During hydrogen release and heat absorption, the heat exchange medium transfers heat to the hydrogen storage material. The inlet pipe 202 and outlet pipe 203 ensure the continuous circulation of the heat exchange medium. The heat exchange is achieved through a temperature sensor 4 that monitors the temperature of the hydrogen storage material inside the hydrogen storage tank 1 in real time and transmits the data to the controller 5. When the temperature is higher than the set value, the controller 5 controls the flow regulating valve 3 to increase its opening, allowing more heat exchange medium to flow through the heat exchange pipe 201 and accelerating heat removal. If the temperature is lower than the set value, the controller 5 reduces the opening of the flow regulating valve 3, reducing the flow rate of the heat exchange medium and slowing down the heat loss rate, thereby achieving precise closed-loop control of the temperature during the hydrogen storage process. The vacuum insulation layer 103 between the outer tank 101 and the inner tank 102 of the hydrogen storage tank 1 greatly reduces heat conduction and convection between the tank and the external environment, reduces the interference of external temperature changes on the hydrogen storage process, and also reduces the heat loss to the outside during the absorption and release of heat by the hydrogen storage material. This ensures that heat is mainly transferred between the hydrogen storage material and the heat exchange components, improving temperature control efficiency.

[0039] In this embodiment, a closed-loop system consisting of temperature sensor 4, controller 5, and flow regulating valve 3 can control the internal temperature of the hydrogen storage tank 1 within a very small fluctuation range, avoiding the impact of excessively high or low temperatures on the hydrogen absorption and release performance of the hydrogen storage material. This ensures that the hydrogen storage and release reactions occur under optimal temperature conditions, significantly improving hydrogen storage efficiency and capacity. Stable temperature control reduces performance degradation and structural damage to the hydrogen storage material caused by drastic temperature changes, extending its service life. Simultaneously, the vacuum insulation layer 103 reduces the impact of external environmental thermal stress on the tank, reducing fatigue damage caused by thermal expansion and contraction, and improving the stability and reliability of the entire hydrogen storage device. The spiral heat exchange pipe 201 design increases the heat exchange area, making heat exchange more thorough and improving heat exchange efficiency. The vacuum insulation layer 103 effectively reduces heat loss. The combination of these two factors significantly reduces energy consumption during hydrogen storage. Compared with traditional hydrogen storage devices, it can save a significant amount of additional energy consumption for temperature control while achieving the same hydrogen storage and release capacity.

[0040] The second embodiment differs from the first embodiment in that: multiple baffles 6 are fixedly installed on the inner wall of the inner tank 102, and both the inner wall of the inner tank 102 and the baffles 6 are made of hydrogen storage material.

[0041] An air inlet pipe 7 and an air outlet pipe 8, which are connected to the inner tank 102, are fixedly installed on the outer tank 101. A valve 9 is fixedly installed on the air inlet pipe 7.

[0042] The liquid inlet pipe 202 and the air inlet pipe 7 are respectively rotatably mounted with a first connector 10 and a second connector 11. The liquid outlet pipe 203 and the air outlet pipe 8 are respectively provided with a first threaded groove 12 and a second threaded groove 13. The first connector 10 is movably connected to the liquid outlet pipe 203 through the first threaded groove 12, and the second connector 11 is threadedly connected to the air outlet pipe 8 through the second threaded groove 13.

[0043] Multiple baffles 6 on the inner wall of the inner tank 102 alter the flow path of hydrogen within the tank, ensuring more thorough and uniform contact between the hydrogen and the hydrogen storage material on the inner wall of the inner tank 102 and the surface of the baffles 6. During hydrogen absorption, the turbulence promotes faster diffusion of hydrogen to the surface of the hydrogen storage material, accelerating chemical reactions or physical adsorption. During hydrogen release, the generated hydrogen also detaches from the material surface promptly, preventing excessively high local hydrogen concentrations from inhibiting the reaction and thus improving the overall reaction rate. The inner wall of the inner tank 102 and the baffles 6 are made of hydrogen storage material, increasing the effective contact area of ​​the hydrogen storage material and increasing the hydrogen storage capacity. Simultaneously, this integrated structure allows for more direct and efficient heat transfer within the hydrogen storage material. The heat generated during hydrogen absorption can be quickly conducted to the heat exchange pipe 201, and heat can be promptly obtained from the heat exchange medium during hydrogen release, reducing heat transfer. The process losses are further optimized to improve heat exchange efficiency; the inlet pipe 7 and outlet pipe 8 on the outer tank 101 provide channels for hydrogen to enter and exit the inner tank 102, and the valve 9 can control the filling and releasing of hydrogen, which is convenient for operation and adjustment; the liquid inlet pipe 202, liquid outlet pipe 203 and the inlet pipe 7, outlet pipe 8 are respectively connected to the corresponding threaded grooves through the first connector 10 and the second connector 11. When it is necessary to splice two hydrogen storage tanks 1, the first connector 10 and the second connector 11 on the liquid inlet pipe 202 and the inlet pipe 7 of one tank are screwed into the threaded grooves of the liquid outlet pipe 203 and the outlet pipe 8 of the other tank. The rigid connection between the tanks is achieved through the meshing of the threads, forming a series structure. The total hydrogen storage capacity can be multiplied without making major modifications to the structure of a single tank, so as to meet the hydrogen storage needs of different scales.

[0044] In this embodiment, the integrated design of the baffle 6 and the hydrogen storage material inner wall significantly increases the contact area and effect between hydrogen and the hydrogen storage material, making the hydrogen absorption and release reactions more complete and rapid, effectively improving hydrogen storage efficiency. At the same time, the participation of more hydrogen storage material in the reaction directly increases the hydrogen storage capacity of the hydrogen storage device, meeting higher energy storage requirements. The first connector 10 and the second connector 11 enable the device to have flexible modular expansion characteristics. Users can quickly connect multiple hydrogen storage tanks 1 in series according to actual hydrogen storage needs, multiplying the total hydrogen storage capacity. This avoids the cumbersome process of redesigning and manufacturing large-capacity single tanks required by traditional hydrogen storage equipment, significantly reducing equipment upgrade costs and time costs.

[0045] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0046] In use, the hydrogen storage temperature control range is set on the controller 5. Based on the characteristics of the hydrogen storage material, the temperature fluctuation range is controlled within ±2℃. The initial opening of the flow regulating valve 3 is set, and the controller 5, flow regulating valve 3, and temperature sensor 4 are turned on to start the heat exchange medium circulation system. The valve 9 of the inlet pipe 7 is opened to slowly introduce hydrogen gas, controlling the flow and pressure to avoid impacting the equipment. The temperature sensor 4 monitors the temperature of the hydrogen storage material in real time and transmits the data to the controller 5. If the temperature rises close to the upper limit, the controller 5 controls the flow regulating valve 3 to increase the opening to accelerate the circulation of the heat exchange medium and remove heat. If the temperature is below the lower limit, the opening of the flow regulating valve 3 is reduced to reduce heat loss. When it is necessary to increase the hydrogen storage capacity, the first connector 10 and the second connector 11 are used to screw the liquid inlet pipe 202 and the gas inlet pipe 7 connector of one tank into the threaded groove of the liquid outlet pipe 203 and the gas outlet pipe 8 of another tank to complete the series splicing. The sealing of the connection is checked to ensure that there is no leakage.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0048] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A solid-state hydrogen storage device with a heat exchange regulation structure, characterized in that, include: A hydrogen storage tank, which is used to contain solid hydrogen storage material and provide a sealed hydrogen storage environment; A heat exchange component is installed on the hydrogen storage tank. The heat exchange component is used to exchange heat with the hydrogen storage material through a circulating heat exchange medium in order to regulate the temperature change during the hydrogen storage process. A flow regulating valve is fixedly installed on the heat exchange assembly. The flow regulating valve is used to dynamically adjust the flow rate of the heat exchange medium according to temperature feedback in order to achieve precise temperature control. A temperature sensor is fixedly installed inside the hydrogen storage tank and is used to monitor the temperature of the hydrogen storage material in real time. The controller is fixedly installed on the outer wall of the hydrogen storage tank. The flow regulating valve and the temperature sensor are both electrically connected to the controller. The controller is used to intelligently control the opening degree of the flow regulating valve based on the data from the temperature sensor, forming a closed-loop temperature control system.

2. A solid hydrogen storage device with a heat exchange regulation structure according to claim 1, characterized in that: The heat exchange assembly includes a heat exchange pipe, which is fixedly installed inside the hydrogen storage tank. A heat exchange medium is provided inside the heat exchange pipe. An inlet pipe and an outlet pipe connected to the heat exchange pipe are fixedly installed on the hydrogen storage tank. The flow regulating valve is fixedly installed on the inlet pipe.

3. A solid hydrogen storage device with a heat exchange regulation structure according to claim 2, characterized in that: The hydrogen storage tank includes an outer tank and an inner tank, with a vacuum insulation layer between the outer tank and the inner tank, and the heat exchange pipe is fixedly installed on the inner tank.

4. A solid hydrogen storage device with a heat exchange regulation structure according to claim 3, characterized in that: The heat exchange pipes are spirally wound and installed on the outer wall of the inner tank.

5. A solid hydrogen storage device with a heat exchange regulation structure according to claim 4, characterized in that: Multiple baffles are fixedly installed on the inner wall of the tank.

6. A solid-state hydrogen storage device with a heat exchange regulation structure according to claim 5, characterized in that: The inner wall of the inner tank and the baffle are both made of hydrogen storage material.

7. A solid hydrogen storage device with a heat exchange regulation structure according to claim 6, characterized in that: An air inlet pipe and an air outlet pipe, which are connected to the inner tank, are fixedly installed on the outer tank, and a valve is fixedly installed on the air inlet pipe.

8. A solid hydrogen storage device with a heat exchange regulation structure according to claim 7, characterized in that: The liquid inlet pipe and the air inlet pipe are respectively rotatably mounted with a first connector and a second connector. The liquid outlet pipe and the air outlet pipe are respectively provided with a first threaded groove and a second threaded groove. The first connector is movably connected to the liquid outlet pipe through the first threaded groove, and the second connector is threadedly connected to the air outlet pipe through the second threaded groove.

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