A phase change thermal storage device

Abstract

This invention proposes a phase change thermal energy storage device, comprising a thermal energy storage module and a heating module. The heating module is connected to the thermal energy storage module and heats the thermal energy storage module. The thermal energy storage module includes a first cavity and a porous body located at the bottom of the first cavity. The porous body forms a first heat exchange region, and the upper part of the porous body forms a second heat exchange region located in the first cavity. The porous body is filled with a phase change material. In the heated state, the phase change material exchanges heat with the porous body in the first heat exchange region through heat conduction, preventing the phase change material from depositing at the bottom of the first cavity. After heat exchange, the phase change material enters the second heat exchange region from the first heat exchange region. This invention physically isolates the phase change material from the heat pipe, preventing heat pipe corrosion and leakage. Simultaneously, by setting a porous body at the bottom of the thermal energy storage module, the thermal resistance of the phase change material side is reduced, improving the overall heat transfer performance of the thermal energy storage device and preventing the phase change material from depositing in the cavity.

Description

Technical Field

[0001] This invention relates to the field of energy storage technology, and more specifically to a phase change thermal energy storage device. Background Technology

[0002] Phase change thermal energy storage technology primarily utilizes the latent heat absorbed by solid-liquid phase change materials during the melting process for heat storage. Thermal storage devices employing phase change energy storage offer advantages such as small size, stable thermal power, and low heat loss, showing broad application prospects in areas such as industrial waste heat utilization, renewable energy consumption, and building energy conservation. However, the thermal conductivity of solid-liquid phase change materials is generally low, and the main thermal resistance in the heat transfer process between the phase change material and the heat exchange fluid is located on the phase change material side. Therefore, heat transfer enhancement technologies are needed to improve the heat transfer coefficient on the phase change material side in order to enable the thermal storage device to achieve efficient heat input and output.

[0003] A heat pipe is a passive heat transfer element that transfers heat by filling a small amount of working fluid into a fully enclosed metal vacuum tube and relying on the vaporization and liquefaction of the working fluid. It possesses excellent thermal conductivity and isothermal properties. Introducing heat pipes into phase change thermal storage devices can significantly reduce the thermal resistance of the phase change material and improve the heat transfer coefficient between the phase change material and the heat exchange fluid. Currently, most common heat pipe-type phase change thermal storage devices employ direct contact heat exchange between the heat pipe and the phase change material, and the cavity encapsulating the phase change material needs to have openings on its upper and lower surfaces to allow the heat pipe to extend outwards and contact the external cold / hot fluid for heat exchange. This structural design typically presents the following problems:

[0004] 1) The phase change material and the cold and hot fluids are in direct contact with the heat pipe for heat exchange. The surface of the heat pipe is prone to corrosion and breakage, which leads to the failure of the heat transfer performance of the heat pipe. The damaged heat pipe is also difficult to replace because it is immersed in the phase change material.

[0005] 2) Phase change thermal storage devices have poor heat transfer performance and low energy utilization rate, and are prone to insufficient phase change of phase change materials.

[0006] 3) In phase change thermal energy storage devices, liquid phase change is prone to seepage and leakage at the points where the heat pipe and the thermal storage cavity pass through. This problem often requires sealing processes with high process requirements to avoid it. At the same time, the assembly and disassembly flexibility is poor, safety and reliability are difficult to guarantee, costs are uncontrollable, and it is difficult to achieve large-scale and standardized production and application.

[0007] Existing patent CN207925627U discloses a battery module thermal management device coupled with heat pipes and phase change materials. This device includes a heat spreader plate and an internal housing for uniformly arranging batteries in rows and columns. A heat exchange device is fitted to the lower surface of the heat spreader plate. Phase change materials are filled in the gaps between the batteries and between the batteries and the inner wall of the housing. Several heat pipes are uniformly embedded within the phase change materials between adjacent batteries, with one end of each heat pipe extending out of the phase change material making heat transfer contact with the upper surface of the heat spreader plate. This device can selectively dissipate heat or heat the battery module according to actual operating conditions. However, the heat pipes in this device are designed inside the phase change material, making them susceptible to corrosion and reducing heat transfer performance.

[0008] Existing patent CN106654430A1 discloses a low-temperature power battery thermal management system based on heat pipes and phase change materials. This system includes a battery, a phase change material, and heat pipes. The battery is placed in a separate battery compartment; the phase change material is placed in a separate phase change material compartment; each battery in the battery compartment is in contact with at least one end of a heat pipe; the other end of the heat pipe extends into the phase change material compartment and contacts the phase change material. The battery compartment, phase change material compartment, and heat pipes are all completely covered with an insulation layer. This system utilizes heat pipes to transfer the heat generated during battery operation and utilizes the phase change material to store heat, transferring heat when the battery temperature decreases to maintain battery temperature.

[0009] In both of the above patents, heat transfer is carried out through direct contact between the heat pipe and the phase change material. Under this approach, the heat pipe is prone to corrosion, resulting in poor safety and reliability of the device, reduced heat transfer performance, and low energy utilization. Summary of the Invention

[0010] Based on the above-mentioned technical problems, this invention proposes a phase change thermal storage device to solve the problems of easy corrosion of heat pipes, reduced heat transfer performance, and low energy utilization in the prior art.

[0011] To achieve the above objectives, this invention proposes a phase change thermal energy storage device, which includes a thermal energy storage module and a heating module. The heating module is connected to the thermal energy storage module and heats the thermal energy storage module.

[0012] The thermal storage module includes a first cavity and a porous body located at the bottom of the first cavity.

[0013] The porous body forms the first heat exchange region, and the upper part of the porous body forms the second heat exchange region located in the first cavity.

[0014] The porous body is filled with phase change material. When heated, the phase change material exchanges heat with the porous body in the first heat exchange zone by heat conduction, which avoids the phase change material from depositing at the bottom of the first cavity. After heat exchange, the phase change material enters the second heat exchange zone from the first heat exchange zone.

[0015] Furthermore, the first cavity is provided with multiple ribs arranged in parallel, and a porous body is provided between adjacent ribs.

[0016] Furthermore, the porous body is located at the bottom of the gap between adjacent ribs, and the height of the porous body is 1 / 4 to 1 / 2 of the height of the rib.

[0017] Furthermore, the heating module includes a heat transfer module, which is arranged adjacent to the heat storage module.

[0018] Furthermore, the heat transfer module includes a second cavity and a heat pipe located inside the second cavity. The second cavity is arranged adjacent to the first cavity, thereby achieving physical isolation between the heat pipe and the phase change material.

[0019] Furthermore, the heating module also includes a heat source module, which is located at the bottom near the heat storage module.

[0020] Furthermore, the heat source module is located at the bottom of the heat transfer module. The heat source module provides heat and the heat transfer module transfers the heat to the heat storage module to heat the phase change material.

[0021] Furthermore, the heating module includes two heat source modules, which are arranged symmetrically about the heat transfer module.

[0022] Furthermore, the device also includes a cold source module, which is located on top of the heat transfer module, forming a symmetrical structure with respect to the heat transfer module.

[0023] Furthermore, both the heat source module and the cold source module are equipped with multiple pipes, and the pipe walls are in direct contact with the heat transfer module.

[0024] Furthermore, a heat-conducting medium is provided between the contact surfaces of each module.

[0025] Furthermore, the porous body can be any one of the porous materials such as nickel foam, copper foam, aluminum fiber, or stainless steel fiber.

[0026] Furthermore, the thickness of the rib is greater than 0.15 mm, and the center-to-center distance between adjacent ribs is 4 to 8 mm.

[0027] Based on the above technical solution, the present invention has at least the following beneficial effects:

[0028] 1. This invention encapsulates the phase change material in the first cavity of the heat storage module, the heat pipe in the second cavity of the heat transfer module, and the hot and cold fluid channels in the cold and hot modules. This achieves physical isolation between the phase change material and the hot and cold fluids and the heat pipe, effectively avoiding problems such as heat pipe corrosion leakage and liquid phase change material seepage leakage. It also offers good safety and reliability.

[0029] 2. The present invention adopts a heat transfer structure combining ribs and porous bodies in the heat storage module to reduce the thermal resistance of the phase change material side. By filling the porous body with the phase change material and placing the porous body at the bottom of the heat storage module cavity, the overall heat transfer performance of the heat storage device is improved, the phase change process of the phase change material is accelerated, and the phase change material is effectively prevented from depositing at the bottom of the cavity.

[0030] 3. The present invention adopts the design concept of assembly and sealed packaging, and assembles the independent and sealed heat storage module, heat transfer module and cold and heat source module through mechanical connection. In case of accident, damaged parts can be replaced in time, improving the assembly and disassembly flexibility of the device and making it easier to realize modular and standardized production. Attached Figure Description

[0031] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0032] Figure 1 This is a schematic diagram of a phase change thermal energy storage device according to an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the thermal storage module of a phase change thermal storage device according to an embodiment of the present invention;

[0034] Figure 3 This is a cross-sectional view of the thermal storage module AA of a phase change thermal storage device according to an embodiment of the present invention;

[0035] Figure 4 This is a cross-sectional view of the thermal storage module BB of a phase change thermal storage device according to an embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of the heat transfer module of a phase change thermal storage device according to an embodiment of the present invention;

[0037] Figure 6 This is a CC cross-sectional view of the heat transfer module of a phase change thermal energy storage device according to an embodiment of the present invention;

[0038] Figure 7 This is a schematic diagram of the heat source and cold source modules of a phase change thermal energy storage device according to an embodiment of the present invention;

[0039] Figure 8 This is a DD cross-sectional view of the heat source and cold source modules of a phase change thermal energy storage device according to an embodiment of the present invention;

[0040] Figure 9 This is an EE cross-sectional view of the heat source and cold source modules of a phase change thermal energy storage device according to an embodiment of the present invention;

[0041] Figure 10This is a schematic diagram of a phase change thermal energy storage device according to a specific embodiment of the present invention.

[0042] The above figures include the following reference numerals:

[0043] 1. Thermal storage module; 10. First cavity; 12. Porous body; 13. Rib plate; 120. First heat exchange zone; 140. Second heat exchange zone; 2. Heating module; 21. Heat transfer module; 210. Second cavity; 212. Heat pipe; 23. Heat source module; 3. Cold source module; 4. Pipe; 41. Pipe wall; 42. Diverter; 43. Connector; 5. Bolt. Detailed Implementation

[0044] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0045] The present invention will be further described in detail below with reference to specific embodiments, which should not be construed as limiting the scope of protection claimed by the present invention. Example

[0046] To address the problems existing in the prior art, this invention proposes a phase change thermal storage device, such as... Figure 1 As shown, the device includes a heat storage module 1 and a heating module 2. The heating module 2 is connected to the heat storage module 1 and is used to heat the heat storage module 1.

[0047] like Figure 2 As shown, the thermal storage module 1 includes a first cavity 10 and a porous body 12 located at the bottom of the first cavity 10. Multiple ribs 13 are arranged inside the first cavity 10, with the ribs 13 arranged in parallel. A porous body 12 is provided between adjacent ribs 13. Figure 3 This is a cross-sectional view (AA) of the thermal storage module in this embodiment. Figure 4 The figure shows a BB cross-sectional view of the thermal storage module in this embodiment.

[0048] To improve the pressure-bearing capacity and heat transfer effect of the first cavity 10, the thickness of the rib plate 13 in this invention is greater than 0.15mm, and the center-to-center distance between adjacent rib plates 13 is 4~8mm.

[0049] Furthermore, the porous body 12 is located at the bottom of the gap between adjacent ribs 13, and the porous body 12 is filled with phase change material. Under the heating of the heating module 2, the porous body 12 improves the heat transfer performance of the heat storage device and accelerates the phase change process of the phase change material, thereby preventing the phase change material from depositing at the bottom of the first cavity 10.

[0050] The height of the porous body 12 can be set according to actual needs. In a preferred embodiment of the present invention, the height of the porous body 12 is set to 1 / 4 to 1 / 2 of the height of the rib plate 13.

[0051] The porous body 12 forms a first heat exchange region 120, and a second heat exchange region 140 located in the first cavity 10 is formed on the upper part of the porous body 12. The material of the porous body 12 can be any of the porous materials such as nickel foam, copper foam, aluminum fiber, and stainless steel fiber.

[0052] Specifically, under the heating of the heating module 2, the phase change material undergoes a phase change in the first heat exchange region 120 and exchanges heat with the porous body 12 by means of heat conduction. The porous body 12 accelerates the phase change process of the phase change material and prevents the phase change material from depositing at the bottom of the first cavity 10. After heat exchange, the phase change material enters the second heat exchange region 140 from the first heat exchange region 120.

[0053] like Figure 1 As shown, the heating module 2 includes a heat transfer module 21, which is arranged adjacent to the heat storage module 1.

[0054] Specifically, such as Figure 5 As shown, the heat transfer module 21 includes a second cavity 210 and a heat pipe 212 located inside the second cavity 210. The second cavity 210 is arranged adjacent to the first cavity 10, realizing the physical isolation between the heat pipe 212 and the phase change material. Figure 6 The figure shows a CC cross-sectional view of the heat transfer module in this embodiment.

[0055] In one embodiment of the present invention, such as Figure 1 As shown, the heating module 2 also includes a heat source module 23, which is located near the bottom of the heat storage module 1. This heat source module 23 indirectly improves the heat exchange efficiency between the porous body 12 and the phase change material, accelerates the phase change process of the phase change material, and prevents the phase change material from depositing at the bottom of the cavity.

[0056] Specifically, the heat source module 23 is located at the bottom of the heat transfer module 21. The heat source module 23 provides heat and the heat transfer module 21 transfers the heat to the heat storage module 1 to heat the phase change material.

[0057] In another embodiment of the present invention, the heating module 2 includes two heat source modules 23, which are symmetrically arranged about the heat transfer module 21 to improve heat storage.

[0058] In addition, the phase change thermal storage device also includes a cold source module 3, which is located on top of the heat transfer module 21 and forms a symmetrical structure with respect to the heat transfer module 21 with the heat source module 23.

[0059] Specifically, such as Figure 7As shown, both the heat source module 23 and the cold source module 3 are equipped with multiple pipes 4. The pipe wall 41 of the pipe 4 is in direct contact with the heat transfer module 21, realizing indirect heat exchange between the cold and hot fluids and the heat pipe 212, avoiding corrosion and breakage of the heat pipe surface that would reduce the heat transfer performance of the heat pipe. Figure 8 The figure shows a DD cross-sectional view of the heat source and cold source modules in this embodiment. Figure 9 The figure shows an EE cross-sectional view of the heat source and cold source modules in this embodiment.

[0060] Furthermore, a heat-conducting medium is provided between the contact surfaces of each module to further improve heat transfer efficiency and reduce heat loss.

[0061] The structural form of the phase change thermal storage device of this invention can ensure that the heat transfer coefficient on the phase change material side reaches 200 W / (m²). 2 With a heat transfer coefficient of ·K or above, compared to a heat storage module without enhanced heat transfer structure, the heat transfer coefficient of the phase change material side can be increased by more than 20 times.

[0062] The following will describe a phase change thermal energy storage device based on a specific embodiment of the present invention.

[0063] like Figure 10 The diagram shows a schematic of a phase change thermal energy storage device according to a specific embodiment of the present invention. The device includes two thermal energy storage modules 1, a heating module 2, and two cold source modules 3. The heating module 2 includes a heat transfer module 21 and two heat source modules 23. The thermal energy storage modules 1 are connected to the heat transfer module 21 and are designed symmetrically about the heat transfer module 21.

[0064] like Figure 2 As shown, the thermal storage module 1 includes a first cavity 10 and a porous body 12 located at the bottom of the first cavity 10. The first cavity 10 contains multiple ribs 13 arranged in parallel, with the porous body 12 positioned between adjacent ribs 13. Figure 3 This is a cross-sectional view (AA) of the thermal storage module in this embodiment. Figure 4 The figure shows a BB cross-sectional view of the thermal storage module in this embodiment.

[0065] Specifically, in this embodiment, the inner cavity thickness of the first cavity 10 is 30~60mm, wherein the thickness of the rib plate 13 is greater than 0.15mm, and the center distance between adjacent rib plates 13 is maintained at 4~8mm, so that the first cavity 10 has good pressure bearing capacity while enhancing heat transfer capacity.

[0066] The porous body 12 is processed into a cube and placed at the bottom of the gap between adjacent ribs 13. The porous body 12 is filled with phase change material. Under the heating of the heating module 2, the porous body 12 improves the heat transfer performance of the heat storage device and accelerates the phase change process of the phase change material, thereby preventing the phase change material from depositing at the bottom of the first cavity 10. The height of the porous body 12 is designed to be 1 / 4 to 1 / 2 of the height of the ribs 13.

[0067] Based on the height setting of the porous body 12 in this embodiment, such as Figure 2 As shown, a first heat exchange region 120 is formed by the porous body 12, and a second heat exchange region 140 is formed on the upper part of the porous body 12 in the first cavity 10.

[0068] Specifically, the through-holes of the porous body 12 are filled with a solid-liquid phase change material. When the phase change material reaches the phase change condition under the heating of the heating module 2, the solid phase change material in the porous body 12 undergoes a phase change in the first heat exchange region 120, gradually changing from a solid to a liquid state. During this process, the phase change material exchanges heat with the porous body 12 through heat conduction. The strong thermal conductivity of the porous body 12 is used to accelerate the phase change process of the phase change material and prevent the phase change material from depositing at the bottom of the first cavity 10. After heat exchange, the liquid phase change material enters the second heat exchange region 140 from the first heat exchange region 120.

[0069] Among them, solid-liquid phase change materials are thermal storage materials with stable thermal and chemical properties, no phase separation, low toxicity, and weak supercooling phenomenon, such as paraffin, fatty acids, and inorganic salts.

[0070] like Figure 10 As shown, the heating module 2 includes a heat transfer module 21 and two heat source modules 23. The heat transfer module 21 is arranged adjacent to the heat storage module 1.

[0071] like Figure 5 The diagram shows the structure of the heat transfer module in this device, as shown below. Figure 5 As shown, the heat transfer module 21 includes a second cavity 210 and a heat pipe 212 located inside the second cavity 210. The second cavity 210 is arranged adjacent to the first cavity 10, realizing the physical isolation between the heat pipe 212 and the phase change material.

[0072] Specifically, each heat pipe 212 located inside the second cavity 210 operates independently, such as... Figure 6 As shown, its cross-section is circular, and the diameter of each heat pipe is less than 10 mm, making the second cavity 210 thinner and enabling better heat transfer. The heat pipe 212 has capillary structures such as foamed metal, sintered metal particles, and metal mesh inside, and is filled with gas-liquid phase change working fluids such as water, acetone, ethanol, and methanol.

[0073] Based on the above heat pipe design, when heat pipe failure occurs during the assembly or operation of the heat storage device, heat pipe 212 can be replaced at any time and in a timely manner, avoiding the problem of liquid phase change material leakage caused by drilling holes at the top and bottom of the heat storage box to pass through the heat pipe in traditional heat pipe phase change heat storage devices.

[0074] like Figure 10 As shown, the heat source module 23 is located near the bottom of the heat storage module 1. This design can indirectly improve the heat exchange efficiency between the porous body 12 and the phase change material, accelerate the phase change process of the phase change material, and prevent the phase change material from depositing at the bottom of the cavity.

[0075] Specifically, the heat source module 23 is located at the bottom of the heat transfer module 21 and is designed symmetrically about the heat transfer module 21. The heat source module 23 provides heat and transfers the heat to the heat storage module 1 through the heat transfer module 21 to heat the phase change material.

[0076] The cold source module 3 is located on top of the heat transfer module 21, forming a symmetrical structure with the heat source module 23 about the heat transfer module 21.

[0077] Specifically Figure 7 The diagram shows the structural schematics of the heat source module 23 and the cold source module 3 in this embodiment. Both have the same external structural design. Each module contains multiple pipes 4 as cold and hot channels. The pipe wall 41 of the pipes 4 is in direct contact with the heat transfer module 21, achieving indirect heat exchange between the cold and hot fluids and the heat pipe 212, thus preventing corrosion and breakage of the heat pipe surface and reducing its heat transfer performance. Diverter joints 42 are welded to both ends of the pipes 4 to improve the uniformity of cold and hot fluid distribution within the pipes 4. In this embodiment, the diameter of the pipes 4 is set to 5~10mm. Figure 8 This is a DD cross-sectional view of the heat source and cold source modules in this embodiment. Figure 9 The figure shows an EE cross-sectional view of the heat source and cold source modules in this embodiment.

[0078] In order to achieve a tight assembly between the modules, the present invention has welded connectors 43 on both sides of the first cavity 10 and at the end of the diversion connector 42 to achieve a tight assembly between the two heat storage modules 1 symmetrically arranged on both sides of the heat transfer module 21, and to achieve a tight assembly between the heat transfer module 21 and the two heat source modules 23 symmetrically arranged or between the heat transfer module 21 and the two cold source modules 3. Bolts 5 are used to assemble each module at each connector.

[0079] Based on the above description of the structure and function of the phase change thermal storage device in this embodiment, the following section selects a commonly used phase change material, rib material, and porous material to verify the actual effect of the phase change thermal storage device.

[0080] Specifically, the phase change material used in the verification experiment was silicic acid, with a melting point of approximately 43°C, a thermal conductivity of 0.14~0.16 W / (m·K), a latent heat of phase change of approximately 190 kJ / kg, and a solid / liquid density of approximately 940 / 885 kg / m³. 3 The solid / liquid specific heat capacities are approximately 2.18 / 2.39 kJ / (kg·°C), and the rib material is aluminum alloy with a specific heat capacity of 871 kJ / (kg·°C) and a density of 2719 kg / m³. 3 The thermal conductivity is 155 W / (m·K). The porous material is aluminum foam with a pore size of 2-3 mm and a porosity of 0.95. Using the above-mentioned phase change thermal storage device structure, the heat transfer coefficient on the phase change material side can be guaranteed to reach 200 W / (m·K). 2 ·K) and above, compared with the heat storage module without enhanced heat transfer structure, the heat transfer coefficient of the phase change material side can be increased by more than 20 times, which verifies that the phase change heat storage device of this embodiment still has strong heat transfer capability while ensuring physical isolation between the heat pipe and the phase change material, which can accelerate the phase change process of the phase change material and effectively prevent the phase change material from depositing at the bottom of the cavity.

[0081] In summary, as can be seen from the above description, the embodiments of the present invention can achieve the following technical effects:

[0082] 1. This invention encapsulates the phase change material in the first cavity of the heat storage module, the heat pipe in the second cavity of the heat transfer module, and the hot and cold fluid channels in the cold and hot modules. This achieves physical isolation between the phase change material and the hot and cold fluids and the heat pipe, effectively avoiding problems such as heat pipe corrosion leakage and liquid phase change material seepage leakage. It also offers good safety and reliability.

[0083] 2. The present invention adopts a heat transfer structure combining ribs and porous bodies in the heat storage module to reduce the thermal resistance of the phase change material side. By filling the porous body with the phase change material and placing the porous body at the bottom of the heat storage module cavity, the overall heat transfer performance of the heat storage device is improved, the phase change process of the phase change material is accelerated, and the phase change material is effectively prevented from depositing at the bottom of the cavity.

[0084] 3. The present invention adopts the design concept of assembly and sealed packaging, and assembles the independent and sealed heat storage module, heat transfer module and cold and heat source module through mechanical connection. In case of accident, damaged parts can be replaced in time, improving the assembly and disassembly flexibility of the device and making it easier to realize modular and standardized production.

[0085] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0086] It should be noted that, in this document, relational terms such as "first" and "second" are used merely 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0087] It should be noted that, in the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

Claims

1. A phase change heat storage device, characterized by, The application relates to a heat storage and supply device, which comprises a heat storage module (1) and a heat supply module (2), wherein the heat supply module (2) is connected to the heat storage module (1) and heats the heat storage module (1), The heat storage module (1) comprises a first cavity (10) and a porous body (12) arranged at the bottom of the first cavity (10), The porous body (12) forms a first heat exchange area (120) in the body, and an upper portion of the porous body (12) forms a second heat exchange area (140) in the first cavity (10), The body of the porous body (12) is filled with a phase change material, in a heated state, the phase change material exchanges heat with the porous body (12) in a heat conduction mode in the first heat exchange area (120), so that the phase change material is prevented from depositing at the bottom of the first cavity (10), and the phase change material after heat exchange enters the second heat exchange area (140) from the first heat exchange area (120); The heat supply module (2) comprises a heat transfer module (21), and the heat transfer module (21) is arranged adjacent to the heat storage module (1); The heat transfer module (21) comprises a second cavity (210) and a heat pipe (212) arranged in the second cavity (210), the second cavity (210) is arranged adjacent to the first cavity (10), and physical isolation of the heat pipe (212) and the phase change material is realized.

2. The phase change heat storage device according to claim 1, wherein A plurality of rib plates (13) are arranged in the first cavity (10), the rib plates (13) are arranged in parallel, and the porous body (12) is arranged between adjacent rib plates (13).

3. The phase change heat storage device according to claim 2, wherein The porous body (12) is arranged at the bottom of the gap between the adjacent rib plates (13), and the height of the porous body (12) is 1 / 4-1 / 2 of the height of the rib plate (13).

4. The phase change heat storage device according to claim 1, wherein The heat supply module (2) further comprises a heat source module (23), and the heat source module (23) is arranged at a bottom position close to the heat storage module (1).

5. The phase change heat storage device according to claim 4, wherein The heat source module (23) is arranged at the bottom of the heat transfer module (21), the heat source module (23) provides heat, and the heat is transferred to the heat storage module (1) by the heat transfer module (21) to heat the phase change material.

6. The phase change heat storage device according to claim 4, wherein The heat supply module (2) comprises two heat source modules (23), and the two heat source modules (23) are symmetrically arranged about the heat transfer module (21).

7. The phase change heat storage device according to claim 4, wherein A cold source module (3) is further arranged, the cold source module (3) is arranged at the top of the heat transfer module (21), and the heat source module (23) and the cold source module (3) form an up-down symmetric structure about the heat transfer module (21).

8. The phase change heat storage device according to claim 7, wherein A plurality of pipes (4) are arranged in the heat source module (23) and the cold source module (3), and the pipe wall (41) of the pipe (4) directly contacts the heat transfer module (21).

9. The phase change heat storage device according to claim 7, wherein Thermal conductive medium is arranged between the contact surfaces of the modules.

10. The phase change heat storage device according to any one of claims 1 to 3, wherein The porous body (12) is any one of foamed nickel, foamed copper, aluminum fiber and stainless steel fiber porous material.

11. The phase change heat storage device according to claim 2, wherein The thickness of the rib plate (13) is greater than 0.15 mm, and the center distance between the adjacent rib plates (13) is 4-8 mm.

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