Rotary force-driven energy storage system

Abstract

The invention discloses a rotary force-driven energy storage system. The rotary force-driven energy storage system comprises a heat storage pool, a heat charging module, a power module and a supporting platform, an end cover of the heat storage pool is in close contact with the inner side wall surface of the heat charging module; the power module can drive the heat storage pool to rotate on the inner side of the heat charging module, so that the centripetal hammer presses the solid phase change material to approach the end cover under the action of centripetal force to realize a contact melting heat charging mode; the heat storage pool can be freely and flexibly disassembled after being filled with heat, serves as an independent movable heat source to be connected with an external heat utilization system, and can also be freely and flexibly disassembled and refilled with heat after heat release of the heat storage pool is completed, so that recycling is achieved. The centripetal force generated by rotation is used for achieving efficient close contact melting so as to enhance the heat storage power, the heat storage pool can be flexibly disassembled and recycled, and the problems that the heat storage process of a traditional energy storage system is slow, and the flexibility is insufficient when heat is conveyed to the heat release end through a pipeline are solved. And a flexible and reliable technical scheme is provided for the energy storage system.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal energy storage, and particularly to a rotary force-driven energy storage system that utilizes the centripetal force generated by rotation to achieve efficient and close contact melting to enhance the heat storage power, and the heat storage unit can be flexibly disassembled and reused repeatedly. Background Art

[0003] Energy storage technologies can be classified according to the form of energy storage into: mechanical energy storage, electrochemical energy storage, thermal energy storage, electromagnetic energy storage, and hydrogen energy storage. In comparison, heat storage technology is not severely restricted by geographical conditions, has a low risk of thermal runaway, and has a relatively high energy density. Therefore, in the fields of industrial waste heat recovery, building energy conservation, and solar energy utilization, the advantages of heat storage technology are obvious. In particular, latent heat storage technology relies on phase change materials to absorb or release heat during phase change for energy storage. Its advantages lie in high energy storage density and relatively stable temperature during the phase change process, and it has broad application prospects and important social significance. However, the latent heat storage technology generally has problems of poor thermal conductivity and low energy storage efficiency. The main reasons can be attributed to the limitations of material properties and phase change processes: First, the inherent thermal conductivity of organic phase change materials and inorganic hydrated salts is generally low. Second, during the solid-liquid phase change process, a liquid layer will form between the solid phase change material and the container wall. Coupled with the poor fluidity of the liquid phase change material, the heat conduction path is further blocked. These problems jointly restrict the thermal response rate and energy utilization efficiency of the latent heat storage system. Traditional solutions to improve the thermal conductivity of latent heat storage technology can start from materials, structures, or flow fields. In terms of material modification, the thermal conductivity of phase change materials is significantly improved by adding high thermal conductivity fillers. At the level of structural optimization, metal fins or ribs are designed to expand the heat transfer surface. In terms of optimizing the flow field, the thermal conductivity is enhanced by stirring the stirring structure to enhance the flow field disturbance.

[0004] However, problems such as poor dispersion, insufficient interfacial compatibility, and high cost of high thermal conductivity fillers in material modification may sacrifice energy density and lead to a decline in cycle stability; structural design relies on fins and heat pipes, which easily cause system volume expansion, dynamic response imbalance, and reliability risks; optimizing the flow field with a stirring rod is only effective for liquid phase change materials and fails when the phase change material is in a solid state. Contact melting refers to a technology in which, during the phase change process, the material is in direct contact with a heat source or a heat transfer surface, thereby promoting heat transfer. Contact melting improves the heat transfer rate and dynamic response ability, and is suitable for rapid charging and discharging scenarios; at the same time, it enhances the adaptability to dynamic thermal loads. However, applying this technology to latent heat storage still faces multiple challenges, such as difficult uniform contact control, and it is difficult to repeat implementation and utilization. Therefore, the application of contact melting still needs to be further developed.

[0005] Energy storage systems can be classified into mobile energy storage systems and immobile energy storage systems according to their mobility. Traditional immobile energy storage systems have mature technologies and currently dominate the market. However, they have high initial investment, long construction cycles, rely on geographical conditions and infrastructure, have fixed siting, and lack flexibility. Mobile energy storage systems have significant advantages over immobile energy storage systems. Mobile energy storage can improve energy utilization efficiency. Industrial waste heat from steel mills, chemical plants, etc. can be transferred to remote residential areas, agricultural greenhouses, or heat-requiring factories through transport vehicles. Mobile energy storage systems can be quickly deployed to provide stable heat and electricity to meet emergency energy supply needs. Mobile energy storage systems can transfer excess heat at night to peak load areas of the power grid through mobile energy storage units, improving energy consumption capacity. Traditional district heating requires laying long-distance pipe networks, and mobile energy storage systems reduce the cost of heat transmission pipe networks. Therefore, mobile energy storage systems are becoming an important carrier for energy allocation due to their remarkable flexibility and adaptability. Summary of the Invention

[0006] The object of the present invention is to provide a rotary force-driven energy storage system that applies a load to a solid phase change material through centripetal force to achieve contact melting and improve the charging efficiency of the energy storage system, aiming at the problems of poor flexibility and low charging and discharging efficiency of current traditional phase change energy storage systems.

[0007] To solve the above technical problems, the technical solution adopted by the present invention is: A rotary force-driven energy storage system, comprising: A heat charging module for providing a heat source or a cold source; A heat storage tank located within the heat charging module and in contact with the heat charging module for heat exchange; the heat storage tank includes an inner housing, a centripetal hammer disposed within the inner housing, and a phase change material; A power module connected to the heat storage tank to rotate the heat storage tank within the heat charging module; during the heat storage process, when the heat storage tank rotates, the centripetal hammer moves within the inner housing and squeezes the solid phase change material towards the end of the heat storage tank in contact with the heat charging module, thereby achieving an efficient contact melting mode.

[0008] In the rotary force-driven energy storage system provided by the present invention, the power module can drive the heat storage tank to rotate clockwise or counterclockwise inside the heat charging module. During the heat charging process, the rotation of the heat storage tank causes the centripetal hammer to press the solid phase change material towards both ends of the heat storage tank under the action of centripetal force, thereby achieving an efficient contact melting mode. During the heat charging process, the pressure load applied by the centripetal hammer to the solid phase change material can be controlled by adjusting the rotation speed of the power module, thereby achieving the regulation of the heat charging rate.

[0009] When the centripetal hammer first touches one end of the heat storage pool, it triggers the reverse rotation of the power device, which in turn causes the centripetal hammer to move in the opposite direction and maintain the efficient contact melting of the phase change material at the other end of the heat storage pool. When the centripetal hammer touches the other end of the heat storage pool again, the heat charging stops.

[0010] At the heat charging end, after the heat storage pool is filled with heat, it can be freely and flexibly disassembled and placed as an independent mobile heat source in a heat preservation shell made of heat insulating material to reduce environmental heat loss. At the heat discharging end, the inlets and outlets on the box body of the heat storage pool are connected to the external heat using system. The heat exchange fluid of the external heat using system absorbs the latent heat of solidification of the phase change material through the microchannels on the inner side of the box body. After the heat storage pool finishes discharging heat, it can also be freely and flexibly disassembled and recharged with heat, thus realizing cyclic use.

[0011] Microchannels and microchannel inlets and outlets are arranged in the wall surface of the box body of the heat storage pool. The upper end cover and the lower end cover of the heat storage pool are both made of high thermal conductivity materials. The inner side wall surface of the heat charging module is made of high thermal conductivity materials while the other side surfaces are insulating materials. The high thermal conductivity materials include but are not limited to metals such as aluminum alloy and copper, and new carbon materials such as graphene.

[0012] Thermal conductive grease is filled between the upper end cover and the lower end cover of the heat storage pool and the inner side wall surface of the heat charging module, including but not limited to silicone-based thermal conductive grease, metal oxide thermal conductive grease, ceramic-based thermal conductive grease, etc.

[0013] The phase change material can be flexibly selected from paraffin, stearic acid, inorganic salts, liquid metals, etc. according to the specific application scenarios of the heat storage pool. Beneficial Effects

[0014] Compared with the prior art, the beneficial effects of the present invention are in the following two aspects: The present invention proposes a method for realizing efficient contact melting by using centripetal force. During the melting process, the rotation of the heat storage pool causes the centripetal hammer to press the solid phase change material towards the upper end cover or the lower end cover under the action of centripetal force. The melted phase change material is discharged from the gap between the solid phase change material and the heat transfer surface, avoiding the formation of a relatively thick liquid layer and realizing the efficient contact melting mode.

[0015] The present invention proposes a design of a heat storage pool. By adopting the box body wall surface structure integrated with microchannels, after the heat storage pool finishes charging heat, it can be quickly disassembled and transported to the heat discharging end as an independent heat source and connected to the external heat using system through an interface. At this time, a low-temperature working fluid is pumped into the wall surface microchannels, and the latent heat of solidification of the phase change material is used for efficient heat exchange with the cold fluid to realize controllable heat energy output. After the heat discharging is completed, the heat storage pool can be re-integrated into the original energy storage device through standardized connection components for a new round of heat charging cycle. Description of the Drawings

[0016] Figure 1a : Schematic diagram a of a rotary force-driven energy storage system; Figure 1b : Schematic diagram b of a rotary force-driven energy storage system; Figure 2 : Schematic diagram of a heat storage pool; Figure 3a : Schematic diagram a of the heat charging process of the heat storage pool; Figure 3b : Schematic diagram b of the heat charging process of the heat storage pool; Figure 4 : Schematic diagram of the working process of the energy storage system; Figure 5 : Schematic diagram of the box structure of the heat storage pool; In the figure: 1. Heat storage pool; 2. Heat charging module; 3. Support platform; 4. Power module; 11. Box body; 12. Upper end cover; 13. Lower end cover; 14. Phase change material; 15. Centripetal hammer; 16. Thermal insulation shell; 111. Microchannel inlet and outlet; 112. Microchannel; 141. Solid phase change material; 142. Liquid phase change material; 41. Bearing seat; 42. Threaded rotating rod; 43. Coupling; 44. Speed control motor; 5 External heat utilization system. Specific implementation manners

[0017] To deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings. This embodiment is only used to explain the present invention and does not constitute a limitation on the protection scope of the present invention.

[0018] This embodiment provides a rotary force-driven energy storage system. As shown in Figure 1, it includes: A heat storage pool 1, a heat charging module 2 and a power module 4. The heat charging module 2 provides a heat source; the heat storage pool 1 is located in the heat charging module 2 and exchanges heat with the heat charging module 2 in contact, and the heat storage pool 1 is connected to the power module 4 to make the heat storage pool 1 rotate in the heat charging module 2. The heat storage pool 1 includes an inner shell and a centripetal hammer 15 and a phase change material 14 arranged inside the inner shell. When the heat storage pool 1 rotates, the centripetal hammer 15 can move in the heat storage pool 1 under the action of centripetal force. During the heat storage process, the rotation of the heat storage pool 1 causes the centripetal hammer 15 to compress the solid phase change material 14 under the action of centripetal force and approach the end of the heat storage pool 1 in contact with the heat charging module 2, and the centripetal hammer 15 squeezes the solid phase change material 14 to achieve an efficient contact melting mode.

[0019] In one embodiment, as Figure 2 shown, the inner shell of the heat storage pool 1 includes a box body 11, an upper end cover 12 and a lower end cover 13. The upper end cover 12 and the lower end cover 13 are arranged at both ends of the box body 11, and the upper end cover 12 and the lower end cover 13 are the ends in contact with the heat charging module 2.

[0020] In one embodiment, as Figure 2 shown, the heat storage pool 1 further includes a thermal insulation shell 16, and the thermal insulation shell 16 is located outside the box body 11.

[0021] In one embodiment, as shown in FIG. 1, the power module 4 includes a coupling 43, a rotating rod 42, and a speed-regulating motor 44. The speed-regulating motor 44 is connected to the rotating rod 42 through the coupling 43. The rotating rod 42 is connected to the heat storage tank 1.

[0022] In one embodiment, the rotary force-driven energy storage system further includes a support platform 3. The power module 4 further includes a bearing seat 41. The speed-regulating motor 44 is fixed to the support platform 3 using bolts. The bearing seat 41 is arranged at the center of the support platform 3 and fastens the central section of the rotating rod 42. The bearing seat 41 is connected to the support platform 3 using bolts.

[0023] In one embodiment, the heat storage tank 1 and the heat charging module 2 are located above the support platform 3, and the power module 4 is located below the support platform 3. The heat storage tank 1 is cuboid-shaped and includes an upper end cover 12, a lower end cover 13, a box body 11, a centripetal hammer 15, and a phase change material 14. The upper end cover 12, the lower end cover 13, and the box body 11 are sealed with bolts. The centripetal hammer 15 and the phase change material 14 are arranged inside the heat storage tank 1. The centripetal hammer 15 is a rectangular heavy block with dimensions smaller than those of the box body 11 and can move freely in the length direction of the box body 11. The heat charging module 2 is designed as an annular shape and has a flow channel arranged inside. The cross-section of the flow channel is square. The heat storage tank 1 is arranged on the inner diameter of the heat charging module 2. The heat storage tank 1 can rotate inside the heat charging module 2 driven by the power module 4. The upper end cover 12 and the lower end cover 13 of the heat storage tank 1 are in close contact with the inner side wall surface of the heat charging module 2.

[0024] In one embodiment, the power module 4 drives the heat storage tank 1 to rotate clockwise first inside the heat charging module 2. During the heat charging process, the rotation of the heat storage tank 1 causes the centripetal hammer 15 to press the solid phase change material 141 towards the upper end cover 12 under the action of centripetal force. As Figure 3a shown, the centripetal hammer 15 squeezes the solid phase change material 141 to achieve an efficient contact melting mode; when the centripetal hammer 15 first touches the upper end cover 12, it triggers the speed-regulating motor 44 to rotate in the opposite direction, causing the centripetal hammer 15 to move in the opposite direction and maintaining the efficient contact melting of the solid phase change material 141 at the other end of the heat storage tank 1, as Figure 3a shown. When the centripetal hammer 15 touches the lower end cover 13 again, the heat charging stops. During the heat charging process, the pressure load applied by the centripetal hammer 15 to the solid phase change material 141 can be controlled by adjusting the rotation speed of the speed-regulating motor, thereby realizing the regulation of the heat charging rate.

[0025] In one embodiment, at the heat charging end, after the heat storage tank 1 is filled with heat, it can be freely and flexibly disassembled and placed in a heat preservation shell 16 made of heat-insulating material as an independent mobile heat source to reduce environmental heat loss. At the heat discharging end, the micro-channel inlet and outlet 111 on the box body 11 of the heat storage tank 1 are connected to an external heat utilization system 5, asFigure 4 As shown, the heat exchange fluid of the external heat system 5 absorbs the latent heat of solidification of the phase change material 14 through the microchannels 112 inside the box body 11. After the heat storage pool 1 finishes discharging heat, it can also be freely and flexibly disassembled and recharged, thus realizing cyclic use.

[0026] In one embodiment, microchannels 112 and inlets and outlets are arranged in the wall surface of the box body 11 of the heat storage pool 1. The upper end cover 12 and the lower end cover 13 of the heat storage pool 1 are both made of aluminum alloy material, and the inner side wall surface of the heat charging module 2 is made of aluminum alloy material while the other side surfaces are all made of insulating materials.

[0027] In one embodiment, silicone-based thermal grease is filled between the upper end cover 12 and the lower end cover 13 of the heat storage pool 1 and the inner side wall surface of the heat charging module 2. The phase change material 14 is selected as paraffin wax.

[0028] The above specific embodiments are only for illustrating the technical concept and structural features of the present invention, aiming to enable those skilled in the art to implement it accordingly. However, the above content does not limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention shall fall within the protection scope of the present invention.

Claims

1. A rotary force-driven energy storage system, characterized in that, Comprising: A heat charging module for providing a heat source or a cold source; A heat storage pool located within the heat charging module and in contact with the heat charging module for heat exchange; the heat storage pool includes an inner housing, a centripetal hammer disposed within the inner housing, and a phase change material; A power module connected to the heat storage pool to rotate the heat storage pool within the heat charging module; during the heat storage process, when the heat storage pool rotates, the centripetal hammer moves within the inner housing and squeezes the solid phase change material towards the end of the heat storage pool in contact with the heat charging module, thereby achieving an efficient contact melting mode.

2. The rotary force-driven energy storage system according to claim 1, wherein The inner housing of the heat storage pool includes a box body, an upper end cover, and a lower end cover. The upper end cover and the lower end cover are disposed at both ends of the box body, and the upper end cover and the lower end cover are the ends in contact with the heat charging module.

3. The rotary force-driven energy storage system according to claim 2, wherein Both the upper end cover and the lower end cover of the heat storage pool are made of high thermal conductivity materials, and the inner side wall surface of the heat charging module is made of high thermal conductivity materials.

4. The rotary force-driven energy storage system according to claim 3, characterized in that, The high thermal conductivity material is a metal material or a new carbon material; the metal material includes aluminum alloy and red copper, and the new carbon material includes graphene.

5. A rotary force-driven energy storage system according to any one of claims 2-4, characterized in that, Microchannels and microchannel inlets and outlets are arranged within the wall surface of the box body of the heat storage pool.

6. A rotary force-driven energy storage system according to claim 5, wherein The heat storage pool further includes a heat insulation outer shell located outside the box body.

7. A rotary force-driven energy storage system according to any one of claims 1-5, characterized in that, The power module includes a coupling, a rotating rod, and a speed regulating motor. The speed regulating motor is connected to the rotating rod through the coupling; the rotating rod is connected to the heat storage pool.

8. A rotary force-driven energy storage system according to any one of claims 1-5, characterized in that, Thermal conductive grease is filled between the upper end cover and the lower end cover of the heat storage pool and the inner side wall surface of the heat charging module; the thermal conductive grease is silicone-based thermal grease, metal oxide thermal grease, or ceramic-based thermal grease.

9. A rotary force-driven energy storage system according to any one of claims 1-5, characterized in that, The phase change material is paraffin, stearic acid, inorganic salt, or liquid metal.

10. A rotary force-driven energy storage system according to any one of claims 1-5, characterized in that, It further includes a support platform. The heat storage pool and the heat charging module are located above the support platform, and the power module is located below the support platform.

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