Superconducting composite phase change heat storage and release plate and preparation method thereof

Abstract

This invention provides a superconducting composite phase change thermal and cold storage plate and its preparation method. The superconducting composite phase change thermal and cold storage plate includes: a blown thermal superconducting plate, a fluid heat exchange section, and a phase change thermal storage section. The blown thermal superconducting plate of this invention serves as the main body for heat conduction or cooling, exhibiting fast heat conduction or cooling rates, good temperature uniformity, high reliability, and low cost. The heat exchange section has high-density, low-height cross-flow fins, resulting in a large fluid convection heat transfer coefficient, high heat transfer efficiency, and a compact structure. The phase change thermal storage material is filled between the surface of the blown thermal superconducting plate and the shell of the thermal storage section. The high-density heat-conducting fins are corrugated fins, disposed on the blown thermal superconducting plate and distributed within the phase change thermal storage material, resulting in a compact structure. This invention solves the technical problems of low thermal conductivity, high thermal resistance, large temperature difference between heat storage and release, and slow rate of heat release in phase change thermal storage materials. The superconducting composite phase change thermal and cold storage plate of this invention can be used as both a superconducting phase change thermal storage plate and a superconducting phase change cold storage plate.

Description

Technical Field

[0001] This invention relates to the field of heat storage, and in particular to a superconducting composite phase change heat and cold storage plate and its preparation method. Background Technology

[0002] Phase change thermal storage is a technology that stores temporarily unused or excess heat or cold for later use. It is an important technology for improving energy efficiency and protecting the environment. Large amounts of heat or cold are used in industrial production, homes, hotels, buildings, residential communities, and commercial centers. However, excessive energy consumption and the inability to store heat can easily lead to insufficient or uneven energy usage, affecting efficiency.

[0003] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this application and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this application.

[0004] In view of the above, it is necessary to provide a superconducting composite phase change thermal and cold storage plate and its preparation method to solve the problem of excessive energy consumption and inability to store heat and cold simultaneously in the existing technology. Summary of the Invention

[0005] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a superconducting composite phase change thermal and cold storage plate and its preparation method, so as to solve the problems of excessive energy consumption and inability to store heat in the prior art.

[0006] To achieve the above and other related objectives, the present invention provides a superconducting composite phase change thermal and cold storage plate, the superconducting composite phase change thermal and cold storage plate comprising:

[0007] The blown thermal superconducting plate includes a first side and a second side opposite to each other. At least one side is provided with interconnected network-like protruding heat transfer pipes. The heat transfer pipes are filled with heat transfer working fluid and are sealed to the outside. The heat transfer working fluid is used to rapidly conduct heat or cold along the heat transfer pipes to the entire surface of the blown thermal superconducting plate.

[0008] The fluid heat exchange section includes a first fluid heat exchange section and a second fluid heat exchange section, which are respectively disposed at both ends of the first surface of the blown thermal superconducting plate. Each of the first and second fluid heat exchange sections includes a heat exchange section shell, heat exchange section fins, a fluid inlet connector, and a fluid outlet connector. The heat exchange section fins and the heat exchange section shell are fixedly connected to the blown thermal superconducting plate, and the heat exchange section fins are cross-flow fins disposed between the heat exchange section shell and the blown thermal superconducting plate.

[0009] The phase change heat storage unit includes a first phase change heat storage unit and a second phase change heat storage unit. The first phase change heat storage unit is disposed on the first surface of the blown thermal superconducting plate and located between the first fluid heat exchange unit and the second fluid heat exchange unit. The second phase change heat storage unit is disposed on the second surface of the blown thermal superconducting plate. Both the first and second phase change heat storage units include a heat storage unit shell, heat-conducting fins, and a phase change heat storage material. The heat-conducting fins are corrugated fins and are disposed on... The blown thermal superconducting plate is fixedly connected to the inner surface of the heat storage chamber shell, and the two ends of the heat-conducting fins maintain a gap with the heat storage chamber shell. The heat storage chamber shell and the blown thermal superconducting plate constitute a sealed heat storage chamber cavity. The phase change heat storage material is filled in the heat storage chamber cavity, and the heat-conducting fins are evenly distributed in the phase change heat storage material to increase the thermal conductivity and cooling performance of the phase change heat storage material, and improve the heat storage and cooling rates of the phase change heat storage material.

[0010] Optionally, the first phase change heat storage unit or the second phase change heat storage unit may have one heat storage cavity or two or more independent heat storage cavities inside.

[0011] Optionally, when the first phase change heat storage unit or the second phase change heat storage unit has one heat storage cavity, the phase change heat storage material in the heat storage cavity is the same; when the first phase change heat storage unit or the second phase change heat storage unit has two or more independent heat storage cavities, the phase change heat storage material in each heat storage cavity may be the same or different.

[0012] Optionally, the phase change heat storage material is an organic or inorganic solid-liquid phase change heat storage material, and it fills the cavity of the heat storage section. When the phase change heat storage section stores heat, the phase change heat storage material changes from a solid phase to a liquid phase. When the phase change heat storage section releases heat, the phase change heat storage material changes from a liquid phase to a solid phase. When the phase change heat storage section stores cold energy, the phase change heat storage material changes from a liquid phase to a solid phase. When the phase change heat storage section releases cold energy, the phase change heat storage material changes from a solid phase to a liquid phase.

[0013] Optionally, the heat exchange section fins include aluminum alloy cross-flow fins; the thickness of the heat exchange section fins ranges from 0.1 mm to 1.0 mm; and the height of the heat exchange section fins ranges from 2 mm to 15 mm.

[0014] Optionally, the heat-conducting fins include aluminum corrugated fins and aluminum alloy corrugated fins; the spacing between two adjacent corrugations of the heat-conducting fins ranges from 2mm to 5mm; the thickness of the heat-conducting fins ranges from 0.1mm to 1.0mm; and the height of the heat-conducting fins ranges from 10mm to 50mm.

[0015] Optionally, the connection between the heat exchanger shell and heat exchanger fins of the fluid heat exchanger and the blown thermal superconducting plate includes brazing in a continuous furnace or a vacuum brazing furnace; the connection between the heat storage shell and heat-conducting fins of the phase change heat storage unit and the blown thermal superconducting plate includes brazing in a continuous furnace or a vacuum brazing furnace.

[0016] Optionally, the heat transfer pipeline is a vacuum-sealed system, and the heat transfer medium filled inside it is a fluid; the distribution shape of the heat transfer pipeline on the blown thermal superconducting plate is at least one of the following: circular honeycomb, hexagonal honeycomb, quadrilateral honeycomb, crisscrossing mesh, series-connected triangles, and rhombuses.

[0017] This invention also provides a method for preparing a superconducting composite phase change thermal and cold storage plate, the method comprising:

[0018] S1: Two aluminum plates are provided, at least one of the aluminum plates has a graphite slurry coating with a preset pipeline shape on its surface, the two aluminum plates with the graphite slurry coating facing inward are snapped together and riveted, and a blown plate with pipeline protrusions on one or both sides is prepared by rolling and blown expansion processes.

[0019] S2: Provides a first fluid heat exchange section, a second fluid heat exchange section, a first phase change heat storage section, and a second phase change heat storage section. The first fluid heat exchange section and the second fluid heat exchange section have the same structure, both including a heat exchange section shell and heat exchange section fins. The first phase change heat storage section and the second phase change heat storage section have the same structure, both including a heat storage section shell and heat-conducting fins. The above components are fixed to the blown plate into an assembly using a welding fixture and then brazed. The first fluid heat exchange section and the second fluid heat exchange section are located at opposite ends of one side of the blown plate, the first phase change heat storage section is located between the first fluid heat exchange section and the second fluid heat exchange section, and the second phase change heat storage section is located on the other side of the blown plate.

[0020] S3: Provide an inlet fluid connector and an outlet fluid connector, and weld the inlet fluid connector and the outlet fluid connector onto the first fluid heat exchange section and the second fluid heat exchange section respectively;

[0021] S4: Evacuate the pipeline of the blown plate, fill it with a preset amount of heat transfer medium, and seal it by welding to form a blown thermal superconducting plate.

[0022] S5: Provide phase change heat storage material, heat and melt the solid phase change heat storage material, fill it in liquid state into the heat storage cavity composed of the first phase change heat storage part, the second phase change heat storage part and the blown thermal superconducting plate, and seal it to finally obtain the superconducting composite phase change heat storage and cold storage plate.

[0023] Optionally, the interior of the first phase change heat storage unit or the second phase change heat storage unit may be one heat storage unit cavity or two or more independent heat storage unit cavities.

[0024] As described above, the superconducting composite phase change thermal and cold storage plate and its preparation method of the present invention have the following beneficial effects:

[0025] The blown superconducting thermal plate of this invention serves as the main body for heat conduction or cooling, exhibiting fast heat conduction or cooling rates, good temperature uniformity, high reliability, and low cost. The heat exchange fins of the fluid heat exchange section are high-density, low-height cross-flow fins, resulting in a large fluid convection heat transfer coefficient, a large heat exchange area, a short heat conduction or cooling distance, high fin efficiency, fast heat exchange or cooling rates, large heat exchange capacity, and a compact structure. The phase change heat storage material in the phase change heat storage section is filled between the surface of the blown superconducting thermal plate and the shell of the heat storage section. The high-density heat-conducting fins are wavy, corrugated fins, disposed on the blown superconducting thermal plate and uniformly distributed within the phase change heat storage material. This results in short, fast, and efficient heat conduction or cooling paths, and a compact structure. This invention solves the defects of the phase change heat storage material, such as low thermal conductivity, high thermal resistance, slow melting and solidification rates, and large temperature differences, as well as the technical challenges of phase change heat storage. The superconducting composite phase change heat and cold storage plate of the present invention can be used as both a superconducting phase change heat storage plate and a superconducting phase change cold storage plate. It can be widely used in refrigeration and air conditioning, cold chain transportation, heating and air conditioning, centralized heating and hot water supply in buildings and communities, greenhouse planting and breeding, etc., and has broad application prospects and significant energy saving and emission reduction effects. Attached Figure Description

[0026] Figure 1 The diagram shown is a structural schematic of the superconducting composite phase change thermal and cold storage plate of the present invention.

[0027] Figure 2 The image shown is a cross-sectional view of the superconducting composite phase change thermal and cold storage plate of the present invention.

[0028] Figure 3 Displayed as Figure 2 A magnified view of a portion of the image.

[0029] Figure 4 The diagram shown is a schematic of the blown thermal superconducting plate structure of the present invention.

[0030] Figure 5 The diagram shown is a schematic representation of the heat exchanger housing structure of the present invention.

[0031] Figure 6 The diagram shown is a schematic diagram of the heat exchanger fin structure of the present invention.

[0032] Figure 7 The graph shown represents the heat and temperature of different phase change heat storage materials in the superconducting composite phase change heat storage and cold storage plate of the present invention.

[0033] Figure 8 The diagram shows a flow chart of the method for preparing the superconducting composite phase change thermal and cold storage plate of the present invention.

[0034] Component designation explanation

[0035] 10 Inflatable thermal superconducting plate

[0036] 11 Heat transfer piping

[0037] 12 Injection lines

[0038] 21 First Fluid Heat Exchange Section

[0039] 22 Second Fluid Heat Exchange Section

[0040] 23 Heat exchanger shell

[0041] 24 Heat exchanger fins

[0042] 25 Inlet Fluid Connector

[0043] 26. Fluid outlet connector

[0044] 31 First Phase Change Heat Storage Unit

[0045] 32 Second Phase Change Heat Storage Unit

[0046] 33 Heat storage unit shell

[0047] 34 Thermal fins

[0048] 35 Phase Change Thermal Storage Materials

[0049] 36. Heat storage chamber Detailed Implementation

[0050] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0051] When describing the embodiments of the present invention in detail, for ease of explanation, the cross-sectional views showing the device structure will be partially enlarged without adhering to the general scale, and the schematic diagrams are merely examples and should not limit the scope of protection of the present invention.

[0052] For ease of description, spatial relation terms such as “below,” “under,” “lower than,” “below,” “above,” and “upper” may be used herein to describe the relationship between one structure or feature shown in the accompanying drawings and other structures or features. It will be understood that these spatial relation terms are intended to include directions other than those depicted in the accompanying drawings for devices in use or operation. Furthermore, when a layer is referred to as being “between” two layers, it can be the only layer between the two layers, or there may be one or more layers in between. The term “between” as used herein includes both endpoint values.

[0053] In the context of this application, the structure described above the first feature may include embodiments in which the first and second features are formed in direct contact, or embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact.

[0054] Please see Figures 1 to 8 It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0055] Example 1

[0056] like Figures 1 to 6 As shown, this embodiment provides a superconducting composite phase change thermal and cold storage plate, which includes:

[0057] The blown-type thermal superconducting plate 10 includes a first side and a second side facing each other. At least one side is provided with interconnected network-like protruding heat transfer pipes 11. The heat transfer pipes 11 are filled with heat transfer working fluid and are sealed to the outside. The heat transfer working fluid is used to rapidly conduct heat or cold along the heat transfer pipes 11 to the entire surface of the blown-type thermal superconducting plate 10.

[0058] The fluid heat exchange section includes a first fluid heat exchange section 21 and a second fluid heat exchange section 22. The first fluid heat exchange section 21 and the second fluid heat exchange section 22 are respectively disposed at both ends of the first surface of the blown thermal superconducting plate 10. The first fluid heat exchange section 21 and the second fluid heat exchange section 22 each include a heat exchange section shell 23, heat exchange section fins 24, a fluid inlet connector 25 and a fluid outlet connector 26. The heat exchange section fins 24 and the heat exchange section shell 23 are fixedly connected to the blown thermal superconducting plate 10. The heat exchange section fins 24 are cross-flow fins and are disposed between the heat exchange section shell 23 and the blown thermal superconducting plate 10.

[0059] The phase change heat storage unit includes a first phase change heat storage unit 31 and a second phase change heat storage unit 32. The first phase change heat storage unit 31 is disposed on the first surface of the blown thermal superconducting plate 10 and is located between the first fluid heat exchange unit 21 and the second fluid heat exchange unit 22. The second phase change heat storage unit 32 is disposed on the second surface of the blown thermal superconducting plate 10. Both the first phase change heat storage unit 31 and the second phase change heat storage unit 32 include a heat storage unit shell 33, heat-conducting fins 34, and a phase change heat storage material 35. The heat-conducting fins 34 are corrugated fins. The heat storage chamber 33 is fixedly connected to the inner surface of the blown thermal superconducting plate 10 and the heat storage chamber shell 33. The two ends of the heat-conducting fins 34 are separated from the heat storage chamber shell 33. The heat storage chamber shell 33 and the blown thermal superconducting plate 10 constitute a sealed heat storage chamber cavity 36. The phase change heat storage material 35 is filled in the heat storage chamber cavity 36. The heat-conducting fins 34 are evenly distributed in the phase change heat storage material 35 to increase the thermal conductivity and cold conductivity of the phase change heat storage material 35 and improve the heat storage and heat release rate and the cold storage and cold release rate of the phase change heat storage material 35.

[0060] It should be noted that the two opposing sides of the blown superconducting heat transfer plate 10 can have interconnected network-like heat transfer pipes 11 on one side (a raised surface) and the other side (a flat surface), or both opposing sides can have interconnected network-like heat transfer pipes 11, both of which are raised surfaces. Since the blown superconducting heat transfer plate 10 is a thin-plate device with high heat flux density, in order to ensure that the heat exchange fins 24 of the fluid heat exchange section are completely and tightly bonded to the blown superconducting heat transfer plate 10 to improve heat exchange efficiency, in this embodiment, the blown process is used so that only one side has interconnected network-like raised heat transfer pipes 11. That is, the first side of the blown superconducting heat transfer plate 10 is a flat surface, and the second side is a raised surface with the heat transfer pipes 11. The first fluid heat exchange section 21, the second fluid heat exchange section 22, and the first phase change heat storage section 31 are all disposed on the flat surface of the blown superconducting heat transfer plate 10, and the second phase change heat storage section 32 is disposed on the raised surface of the blown superconducting heat transfer plate 10. The first fluid heat exchange section 21 and the second fluid heat exchange section 22 are both disposed on the plane of the blown thermal superconducting plate 10, which helps to increase the contact area with the blown thermal superconducting plate 10 and accelerate the heat conduction or cooling rate.

[0061] The working principle of the superconducting composite phase change thermal and cold storage plate is as follows: During the thermal storage process, the hot fluid flows in from the inlet connector 25 of the second fluid heat exchange section 22 at one end, flows through the heat exchange section fins 24 inside the second fluid heat exchange section 22, and conducts heat through the heat exchange section fins 24 to the blown thermal superconducting plate 10 combined with the heat exchange section fins 24, and then flows out through the outlet connector 26, realizing the heat input of the hot fluid; after receiving the heat conducted from the heat exchange section fins 24, the blown thermal superconducting plate 10 combined with the heat exchange section fins 24 inside the second fluid heat exchange section 22, it quickly conducts the heat to the other surfaces of the entire blown thermal superconducting plate 10 through the heat transfer medium in the heat transfer pipe 11 inside the blown thermal superconducting plate 10. Heat is transferred from the surface of the blown thermal superconducting plate 10 to the heat-conducting fins 34, and then conducted through the heat-conducting fins 34 to the phase change heat storage material 35. The phase change heat storage material 35 absorbs heat and rises in temperature. After reaching the phase change temperature, the temperature remains constant. The phase change heat storage material 35 begins to absorb heat and melt, gradually changing from a solid to a liquid. When the phase change heat storage material 35 has completely melted, the temperature continues to rise, completing the phase change heat storage process.

[0062] During the phase change heat release process, the phase change heat storage material 35 in the phase change heat storage section conducts heat through the heat-conducting fins 34 and the surface portion of the blown thermal superconducting plate 10 combined with the phase change heat storage material 35 to the blown thermal superconducting plate 10. The blown thermal superconducting plate 10 then rapidly conducts heat to the first fluid heat exchange section 21 through the heat transfer medium inside the heat transfer pipe 11. The heat exchange section fins 24 inside the first fluid heat exchange section 21 convectively transfer heat with the cold fluid, causing the cold fluid to absorb heat and rise in temperature. The cold fluid then flows from the first fluid heat exchange section 21... The fluid flows into the inlet connector 25 of the first fluid heat exchange section 21, passes through the heat exchange fins 24 inside the first fluid heat exchange section 21, absorbs the heat of the heat exchange fins 24 and raises the temperature, and then flows out through the outlet connector 26 to realize the heating of the cold fluid; during the heat release process, when the phase change heat storage material 35 in the phase change heat storage section reaches the phase change temperature, the liquid gradually turns into a solid as the heat release continues. When the phase change heat storage material 35 is completely solidified, the temperature continues to drop, completing the phase change heat release process.

[0063] The superconducting composite phase change heat and cold storage plate can function as both a superconducting phase change heat storage plate and a superconducting phase change cold storage plate, with its cold storage process being similar to its heat storage process. As a superconducting phase change heat storage plate, the second fluid heat exchanger 22 operates during heat storage, and the first fluid heat exchanger 21 operates during heat release. As a superconducting phase change cold storage plate, the first fluid heat exchanger 21 operates during cold storage, and the refrigerant from the refrigeration device can be directly connected to the first fluid heat exchanger 21; the second fluid heat exchanger operates during cold release.

[0064] In this embodiment, the blown thermal superconducting plate 10 serves as the main body for heat conduction or cooling, exhibiting fast heat conduction or cooling rates, good temperature uniformity, high reliability, and low cost. The heat exchange fins 24 of the fluid heat exchange section are high-density, low-height cross-flow fins, resulting in a large fluid convection heat transfer coefficient, a large heat exchange area, a short heat conduction or cooling distance, high fin efficiency, fast heat exchange or cooling rates, high capacity, and a compact structure. The phase change heat storage material 35 in the phase change heat storage section is filled in the blown thermal superconducting plate 10. Between the surface of the expandable thermal superconducting plate 10 and the heat storage shell 33, high-density heat-conducting fins 34 are corrugated fins disposed on the expandable thermal superconducting plate 10 and uniformly distributed within the phase change heat storage material 35. This results in a short, fast, and efficient heat or cold conduction path, and a compact structure. It solves the technical problems of the phase change heat storage material 35, such as low thermal conductivity, high thermal resistance, slow rate of heat absorption melting and heat release solidification phase change, and large thermal temperature difference. The superconducting composite phase change heat and cold storage plate of this embodiment can serve as both a superconducting phase change heat storage plate and a superconducting phase change cold storage plate. It can be widely used in refrigeration and air conditioning, cold chain transportation, heating and air conditioning, centralized heating and hot water supply in buildings and communities, greenhouse planting and breeding, etc., and has broad application prospects and significant energy-saving and emission-reduction effects.

[0065] like Figure 2 As shown, as an example, the first phase change heat storage unit 31 or the second phase change heat storage unit 32 is provided with one heat storage cavity 36 or two or more independent heat storage cavities 36.

[0066] As an example, when the first phase change heat storage unit 31 or the second phase change heat storage unit 32 has one heat storage cavity 36, the phase change heat storage material 35 in the heat storage cavity 36 is the same; when the first phase change heat storage unit 31 or the second phase change heat storage unit 32 has two or more independent heat storage cavities 36, the phase change heat storage material 36 in each heat storage cavity 36 may be the same or different, and when they are different, a temperature gradient distribution can be achieved.

[0067] In this embodiment, the first phase change heat storage unit 31 is located between the first fluid heat exchange unit 21 and the second fluid heat exchange unit 22, and includes two independent heat storage cavities 36. The second phase change heat storage unit 32 is located on the entire second surface of the blown thermal superconducting plate 10, and includes three independent heat storage cavities 36. The phase change heat storage material 36 in each heat storage cavity 36 is different. Of course, the first phase change heat storage unit 31 or the first phase change heat storage unit 32 can both be a single heat storage cavity 36, or one phase change heat storage unit can be a single heat storage cavity 36, while the other phase change heat storage unit can be multiple heat storage cavities 36. The configuration can be made according to actual needs, and no limitation is made here. The division of the different heat storage chambers 36 is to make them into independent chambers within the heat storage shell 33. Each chamber is sealed and separated, and each chamber is provided with one heat-conducting fin 34. It can also be understood that the number of heat-conducting fins 34 is equal to the number of heat storage chambers 36.

[0068] Taking the three independent heat storage cavities 36 in the second phase change heat storage section 32 as an example, the phase change heat storage materials 36 in the three independent heat storage cavities 36 are different, and are respectively named the first phase change heat storage material (PCM-1), the second phase change heat storage material (PCM-2), and the third phase change heat storage material (PCM-3). The heat storage cavities 36 filled with different phase change heat storage materials can form a heat storage unit with a multi-gradient temperature, the principle of which is as follows. Figure 7As shown, as the temperature rises, the first phase change thermal storage material first absorbs heat and undergoes a gradual melting process from solid to liquid. During the phase change melting process, the phase change temperature remains constant, so the temperature can be maintained at t1. When the first phase change thermal storage material has completely melted, the temperature continues to rise. When it rises to t2, the second phase change thermal storage material begins to absorb heat and undergoes a phase change from solid to liquid, and the temperature can be maintained at t2 again. This process continues, so the temperature can change in a gradient. Different temperature and heat storage requirements can be achieved by reasonably adjusting the filling amount of different phase change thermal storage materials.

[0069] As an example, the connection between the heat exchanger shell 23 and heat exchanger fins 24 of the fluid heat exchanger and the blown thermal superconducting plate 10 includes brazing in a continuous furnace or a vacuum brazing furnace; the connection between the heat storage shell 33 and heat-conducting fins 34 of the phase change heat storage unit and the blown thermal superconducting plate 10 includes brazing in a continuous furnace or a vacuum brazing furnace.

[0070] In this embodiment, all connections are made by brazing. A low-melting-point solder is heated and melted, and the liquid solder is then used to fill the space between the two components to be connected. The fluid heat exchange section brazed to the blown superconducting plate 10 consists of the heat exchange section shell 21 and the heat exchange section fins 23. The phase change heat storage section brazed to the blown superconducting plate 10 consists of the heat storage section shell 33 and the heat-conducting fins 34. The heat-conducting fins 34 are directly brazed to the surface of the blown superconducting plate 10 and are located within the phase change heat storage material 35. This results in a short, fast, and efficient heat conduction path during heat storage and release, solving the technical problems of low thermal conductivity, high thermal resistance, slow heat transfer rate, and large temperature difference in the phase change heat storage material 35. In addition, the phase change heat storage unit includes a first phase change heat storage unit 31 and a second phase change heat storage unit 32. The first phase change heat storage unit 31 is brazed to the first surface of the flat blown thermal superconducting plate 10, and the second phase change heat storage unit 32 is brazed to the second surface of the convex blown thermal superconducting plate 10. All the above brazing is carried out in the continuous furnace or the vacuum brazing furnace.

[0071] like Figures 5 to 6 As shown, as an example, the heat exchange fins 24 include aluminum alloy cross-flow fins; the thickness of the heat exchange fins 24 ranges from 0.1mm to 1.0mm, for example, it can be 0.1mm, 0.2mm, 0.4mm, 0.6mm, 0.8mm, or 1mm; the height of the heat exchange fins 24 ranges from 2mm to 15mm, for example, it can be 2mm, 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, or 15mm.

[0072] The aluminum alloy cross-flow fins are high-density, low-height reinforced thermally conductive cross-flow fins. In this embodiment, aluminum alloy cross-flow fins are used as a cross-flow fin assembly connected to the blown thermal superconducting plate 10. The fluid convection heat transfer coefficient is large, the heat transfer area is large, the heat conduction distance is small, the fin efficiency is high, the heat transfer rate is fast, the heat transfer capacity is large, and the structure is compact.

[0073] like Figure 3 As shown, as an example, the heat-conducting fins 34 include aluminum corrugated fins and aluminum alloy corrugated fins, which can be selected according to actual needs; the spacing between two adjacent corrugations of the heat-conducting fins 34 ranges from 2mm to 5mm, for example, it can be 2mm, 3mm, 4mm, or 5mm; the thickness of the heat-conducting fins 34 ranges from 0.1mm to 1.0mm, for example, it can be 0.1mm, 0.3mm, 0.5mm, 0.7mm, or 1mm; the height of the heat-conducting fins 34 ranges from 10mm to 50mm, for example, it can be 10mm, 20mm, 30mm, 40mm, or 50mm.

[0074] It should be noted that the spacing, thickness and height between each fold of the heat-conducting fin 34 should be consistent, in order to facilitate processing and maintain uniformity during heat conduction.

[0075] As an example, the phase change heat storage material 35 is an organic or inorganic solid-liquid phase change heat storage material, and it fills the heat storage cavity 36. When the phase change heat storage part stores heat, the phase change heat storage material 35 changes from a solid phase to a liquid phase. When the phase change heat storage part releases heat, the phase change heat storage material 35 changes from a liquid phase to a solid phase. When the phase change heat storage part stores cold energy, the phase change heat storage material changes from a liquid phase to a solid phase. When the phase change heat storage part releases cold energy, the phase change heat storage material changes from a solid phase to a liquid phase.

[0076] The phase change heat storage material 35, at its own phase change temperature, utilizes the latent heat of phase change to absorb a large amount of heat with a small volume and weight, storing excess heat or cold while maintaining a constant temperature. In this embodiment, the heat storage capacity and temperature of the superconducting composite phase change heat storage plate are related to the amount and thermal properties of the phase change heat storage material 35, namely its weight, heat of phase change, and phase change temperature. In this embodiment, paraffin wax is preferentially used as the phase change heat storage material 35, and it is filled completely into the heat storage cavity 36, resulting in fast and efficient heat or cold conduction.

[0077] like Figure 4 As shown, as an example, the heat transfer pipeline 11 is a vacuum-sealed system, and the heat transfer medium filled inside it is a fluid.

[0078] In this embodiment, the heat transfer medium is preferably a mixture of liquid and gas, and the liquid occupies 10% to 50% of the space of the heat transfer pipe 11, for example, 10%, 20%, 30%, 40%, or 50%. The interconnected, sealed heat transfer pipes 11 cover the entire blown superconducting heat transfer plate 10, ensuring uniform temperature, high thermal conductivity, and high heat dissipation efficiency. The vacuum sealing system further guarantees and improves the heat transfer efficiency and capacity of the blown superconducting heat transfer plate 10. Of course, on one side of the blown superconducting heat transfer plate with the heat transfer pipes 11, a liquid injection pipe 12 connected to the heat transfer pipes 11 is also provided for extracting non-condensable gases and injecting the heat transfer medium.

[0079] As an example, the heat transfer pipes 11 are distributed on the blown thermal superconducting plate 10 in at least one of the following shapes: circular honeycomb, hexagonal honeycomb, quadrilateral honeycomb, crisscrossing mesh, series-connected triangles, and rhombuses. The specific shape of the heat transfer pipes 11 can be selected according to actual needs and is not limited here.

[0080] Example 2

[0081] like Figure 8 As shown, this embodiment provides a method for preparing a superconducting composite phase change thermal and cold storage plate. This method is used to prepare the superconducting composite phase change thermal and cold storage plate described in Embodiment 1. The method includes:

[0082] First, in step S1, two aluminum plates are provided, at least one of which has a graphite slurry coating with a preset pipeline shape on its surface. The two aluminum plates with the graphite slurry coating are snapped together and riveted to fix them in place. The plates are then processed into a blown plate with pipeline protrusions on one or both sides through rolling and blown-inflating processes.

[0083] In this embodiment, one aluminum plate is preferentially printed with a graphite paste coating of a preset pipeline shape on its surface. Another aluminum plate is then placed on the surface of the aluminum plate with the pipeline shape printed on it, assembled, and riveted. The riveted components are then heated and rolled together. Finally, the blown plate is made by rolling and blowing processes, with one side having a pipeline protrusion and the other side being flat.

[0084] Next, step S2 is performed, providing a first fluid heat exchanger 21, a second fluid heat exchanger 22, a first phase change heat storage unit 31, and a second phase change heat storage unit 32. The first fluid heat exchanger 21 and the second fluid heat exchanger 22 have the same structure, both including a heat exchanger shell 23 and heat exchanger fins 24. The first phase change heat storage unit and the second phase change heat storage unit have the same structure, both including a heat storage unit shell 33 and heat-conducting fins 34. The above components are fixed to the blown plate into an assembly using a welding fixture and then brazed. The first fluid heat exchanger 21 and the second fluid heat exchanger 22 are located at opposite ends of one side of the blown plate, the first phase change heat storage unit 31 is located between the first fluid heat exchanger 21 and the second fluid heat exchanger 22, and the second phase change heat storage unit 32 is located on the other side of the blown plate.

[0085] In this embodiment, the first fluid heat exchange section 21, the second fluid heat exchange section 22, and the first phase change heat storage section 31 are all located on one side of the plane of the blown plate. The second phase change heat storage section 32 is disposed on one side of the convex surface of the blown plate. The heat exchange fins 24 of the fluid heat exchange section and the heat-conducting fins 34 of the phase change heat storage section are placed in a continuous furnace or a vacuum brazing furnace and connected to the surface of the blown plate by a brazing process. The heat exchange shell 23 and the heat storage shell 33 are covered on the fins and connected to the surface of the blown plate by a brazing process.

[0086] As an example, the interior of the first phase change heat storage unit 31 or the second phase change heat storage unit 32 may be one heat storage cavity 36 or two or more independent heat storage cavities 36.

[0087] The division of the different heat storage cavities 36 is achieved by forming independent cavities within the heat storage housing 33. Each cavity is sealed and separated, and each cavity is equipped with one heat-conducting fin 34. The number of heat-conducting fins 34 corresponds to the number of heat storage cavities 36. In this embodiment, the first phase change heat storage unit 31 includes two heat storage cavities 36, and the second phase change heat storage unit 32 includes three heat storage cavities 36. However, the configuration can be adjusted according to actual needs and is not limited here.

[0088] Next, step S3 is performed, in which an inlet fluid connector 25 and an outlet fluid connector 26 are provided, and the inlet fluid connector 25 and the outlet fluid connector 26 are welded onto the first fluid heat exchange section 21 and the second fluid heat exchange section 22.

[0089] In this embodiment, since the first fluid heat exchanger 21 and the second fluid heat exchanger 22 have the same structure, and the positions of the fluid inlet connector 25 and the fluid outlet connector 26 are also the same, this embodiment preferentially adopts the arrangement of the fluid inlet connector 25 at the bottom and the fluid outlet connector 26 at the top, which facilitates the inflow and outflow of liquid fluid.

[0090] Next, in step S4, the pipeline of the blown plate is evacuated, a preset amount of heat transfer medium is injected, and then sealed by welding to form the blown thermal superconducting plate 10.

[0091] In this embodiment, during the preparation of the inflatable plate, a liquid injection pipe 12 connected to the heat transfer pipe 11 also needs to be prepared. This pipe is used to extract the non-condensable gas inside the heat transfer pipe 11 and fill it with the heat transfer medium. The filling amount of the heat transfer medium and the preset space ratio can be set according to actual needs and are not limited here. It should be noted that the overall sealing performance should be ensured during sealing to avoid leakage and unnecessary losses.

[0092] Finally, in step S5, phase change heat storage material 35 is provided. The solid phase change heat storage material 35 is heated and melted, then filled into the heat storage cavity 36 formed by the first phase change heat storage section 31, the second phase change heat storage section 32, and the blown superconducting thermal plate 10 in a liquid state. The cavity is then sealed to obtain the superconducting composite phase change heat storage and cold storage plate. The required amount of phase change heat storage material 35 can be filled according to the specific function of the superconducting composite phase change heat storage and cold storage plate.

[0093] In summary, this invention provides a superconducting composite phase change thermal and cold storage plate and its preparation method. The superconducting composite phase change thermal and cold storage plate includes: a blown thermal superconducting plate, the blown thermal superconducting plate having a first side and a second side facing each other, at least one of the first side and the second side of the blown thermal superconducting plate being provided with interconnected network-like protruding heat transfer pipes, the heat transfer pipes being filled with a heat transfer working fluid and sealed to the outside environment, the heat transfer working fluid being used to rapidly conduct heat or cold along the heat transfer pipes to the entire blown thermal superconducting plate. The guide plate surface; a fluid heat exchange section, comprising a first fluid heat exchange section and a second fluid heat exchange section, which are respectively disposed at both ends of the first surface of the blown thermal superconducting plate. Each of the first and second fluid heat exchange sections includes a heat exchange section shell, heat exchange section fins, an inlet fluid connector, and an outlet fluid connector. The heat exchange section fins and the heat exchange section shell are fixedly connected to the blown thermal superconducting plate, and the heat exchange section fins are cross-flow fins disposed on the heat exchange section shell. Between the body and the blown superconducting thermal plate; a phase change heat storage section, the phase change heat storage section including a first phase change heat storage section and a second phase change heat storage section, the first phase change heat storage section being disposed on the first surface of the blown superconducting thermal plate and located between the first fluid heat exchange section and the second fluid heat exchange section, the second phase change heat storage section being disposed on the second surface of the blown superconducting thermal plate, both the first and second phase change heat storage sections including a heat storage section shell, heat-conducting fins and a phase change heat storage material, the heat-conducting fins being wavy and corrugated. The heat-conducting fins are disposed on the blown thermal superconducting plate and fixedly connected to the inner surface of the heat storage chamber shell. The two ends of the heat-conducting fins maintain a gap with the heat storage chamber shell. The heat storage chamber shell and the blown thermal superconducting plate constitute a sealed heat storage chamber cavity. The phase change heat storage material is filled in the heat storage chamber cavity. The heat-conducting fins are evenly distributed in the phase change heat storage material to increase the thermal conductivity and cold conductivity of the phase change heat storage material, and improve the heat storage and heat release rate and the cold storage and cold release rate of the phase change heat storage material.The blown-type thermal superconducting plate of this invention serves as the main body for heat conduction or cooling, exhibiting fast heat conduction or cooling rates, good temperature uniformity, high reliability, and low cost. The heat exchange fins of the fluid heat exchange section are high-density, low-height cross-flow fins, resulting in a large fluid convection heat transfer coefficient, a large heat transfer area, a short heat conduction or cooling distance, high fin efficiency, fast heat exchange or cooling rates, high capacity, and a compact structure. The phase change heat storage material in the phase change heat storage section is filled between the surface of the blown-type thermal superconducting plate and the heat storage shell. Large-area thermally conductive fins are disposed on the blown-type thermal superconducting plate. The superconducting composite phase change heat storage plate is uniformly distributed within the phase change heat storage material, resulting in a short, fast, and efficient heat conduction or cooling path with a compact structure. This solves the technical problems of low thermal conductivity, high thermal resistance, slow heat storage and release rates, and large temperature differences inherent in existing phase change heat storage materials. The superconducting composite phase change heat storage plate of this invention can function as both a superconducting composite phase change heat storage plate and a superconducting phase change cold storage plate, and can be widely applied in refrigeration and air conditioning, cold chain transportation, heating and air conditioning, centralized heating and hot water supply in buildings and communities, greenhouse planting and breeding, etc., showing broad application prospects and significant energy-saving and emission-reduction effects. Therefore, this invention effectively overcomes the various shortcomings of existing technologies and has high industrial utilization value.

[0094] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A superconducting composite phase change thermal storage panel, characterized by, The superconducting composite phase change heat storage board comprises: The inflation heat superconducting board comprises opposite first and second surfaces, at least one surface is provided with a network of interconnected raised heat transfer pipelines, the heat transfer pipelines are filled with heat transfer working medium and sealed from the outside, and the heat transfer working medium is used for rapidly conducting heat or cold to the entire surface of the inflation heat superconducting board along the heat transfer pipelines. The fluid heat exchange part comprises first and second fluid heat exchange parts, the first and second fluid heat exchange parts are respectively arranged at two ends of the first surface of the inflation heat superconducting board, and the first and second fluid heat exchange parts each comprise a heat exchange part shell, heat exchange part fins, a fluid inlet joint and a fluid outlet joint, the heat exchange part fins and the heat exchange part shell are fixedly connected with the inflation heat superconducting board, and the heat exchange part fins are cross-flow fins arranged between the heat exchange part shell and the inflation heat superconducting board. The phase change heat storage part comprises first and second phase change heat storage parts, the first phase change heat storage part is arranged on the first surface of the inflation heat superconducting board and located between the first and second fluid heat exchange parts, the second phase change heat storage part is arranged on the second surface of the inflation heat superconducting board, and the first and second phase change heat storage parts each comprise a heat storage part shell, heat conduction fins and phase change heat storage material, the heat conduction fins are wave-shaped zigzag fins arranged on the inflation heat superconducting board and fixedly connected with the inner surface of the heat storage part shell, the heat conduction fins have gaps at two ends from the heat storage part shell, the heat storage part shell and the inflation heat superconducting board form a sealed heat storage part cavity, the phase change heat storage material is filled in the heat storage part cavity, and the heat conduction fins are uniformly distributed in the phase change heat storage material and used for increasing the heat conduction and cold conduction performance of the phase change heat storage material and improving the heat storage and release rate and cold storage and release rate of the phase change heat storage material.

2. The superconducting composite phase change thermal storage panel of claim 1, wherein: The first or second phase change heat storage part is internally provided with one heat storage part cavity or two or more independent heat storage part cavities.

3. The superconducting composite phase change thermal storage panel of claim 2, wherein: When the first or second phase change heat storage part is internally provided with one heat storage part cavity, the phase change heat storage material in the heat storage part cavity is the same, and when the first or second phase change heat storage part is internally provided with two or more independent heat storage part cavities, the phase change heat storage material in each heat storage part cavity is the same or different.

4. The superconducting composite phase change thermal storage panel of claim 1, wherein: The phase change heat storage material is organic or inorganic solid-liquid phase change heat storage material and is filled in the heat storage part cavity, the phase change heat storage material is changed from solid phase to liquid phase when the phase change heat storage part stores heat, the phase change heat storage material is changed from liquid phase to solid phase when the phase change heat storage part releases heat, the phase change heat storage material is changed from liquid phase to solid phase when the phase change heat storage part stores cold, and the phase change heat storage material is changed from solid phase to liquid phase when the phase change heat storage part releases cold.

5. The superconducting composite phase change thermal storage panel of claim 1, wherein: The heat exchange fins comprise aluminum alloy cross-flow fins; the thickness of the heat exchange fins ranges from 0.1 mm to 1.0 mm; and the height of the heat exchange fins ranges from 2 mm to 15 mm.

6. The superconducting composite phase change thermal storage panel of claim 1, wherein: The heat conduction fins comprise aluminum wave-shaped fins and aluminum alloy wave-shaped fins; the distance between two adjacent waves of the heat conduction fins ranges from 2 mm to 5 mm; the thickness of the heat conduction fins ranges from 0.1 mm to 1.0 mm; and the height of the heat conduction fins ranges from 10 mm to 50 mm.

7. The superconducting composite phase change thermal storage panel of claim 1, wherein: The connection mode of the heat exchange fin shell and the heat exchange fin of the fluid heat exchange part and the blow-molded thermal superconducting plate comprises continuous furnace or vacuum brazing furnace brazing connection; and the connection mode of the heat storage part shell and the heat conduction fin of the phase change heat storage part and the blow-molded thermal superconducting plate comprises continuous furnace or vacuum brazing furnace brazing connection.

8. The superconducting composite phase change thermal storage panel of claim 1, wherein: The heat transfer pipeline is a vacuum sealed system, and the heat transfer working medium filled in the pipeline is a fluid; and the distribution shape of the heat transfer pipeline on the blow-molded thermal superconducting plate is at least one of circular honeycomb shape, hexagonal honeycomb shape, quadrilateral honeycomb shape, longitudinal and transverse interlaced net shape, head-to-tail series triangle shape and rhombus shape.

9. A method for preparing a superconducting composite phase change thermal storage panel, for preparing a superconducting composite phase change thermal storage panel according to any one of claims 1 to 8, characterized in that, The preparation method of the superconducting composite phase change heat storage and cold storage plate comprises: S1: providing two aluminum plates, at least one of which is provided with a graphite slurry coating with a preset pipeline shape on the surface, and clamping and riveting the two aluminum plates with the graphite slurry coating on the inner surface, and preparing a blow-molded plate with pipeline protrusions on one or both surfaces through rolling and blow-molding processes; S2: providing a first fluid heat exchange part, a second fluid heat exchange part, a first phase change heat storage part and a second phase change heat storage part, the first fluid heat exchange part and the second fluid heat exchange part are the same in structure, both comprising a heat exchange part shell and a heat exchange fin, the first phase change heat storage part and the second phase change heat storage part are the same in structure, both comprising a heat storage part shell and a heat conduction fin, the first fluid heat exchange part, the second fluid heat exchange part, the first phase change heat storage part and the second phase change heat storage part are fixed into a combination body with the blow-molded plate through a welding fixture, and brazing treatment is performed, wherein the first fluid heat exchange part and the second fluid heat exchange part are respectively located at the two ends of one side of the blow-molded plate, the first phase change heat storage part is located between the first fluid heat exchange part and the second fluid heat exchange part, and the second phase change heat storage part is located on the other side of the blow-molded plate; S3: providing an inlet fluid connector and an outlet fluid connector, and welding the inlet fluid connector and the outlet fluid connector on the first fluid heat exchange part and the second fluid heat exchange part, respectively; S4: vacuumizing the pipeline of the blow-molded plate, filling a preset amount of heat transfer working medium, and sealing and welding to prepare a blow-molded thermal superconducting plate; S5: providing phase change heat storage materials, heating and melting the solid phase change heat storage materials, and filling them into the heat storage part cavity formed by the first phase change heat storage part, the second phase change heat storage part and the blow-molded thermal superconducting plate in a liquid state, and performing sealing treatment, to finally obtain the superconducting composite phase change heat storage and cold storage plate.

10. The method for preparing the superconducting composite phase change thermal and cold storage plate according to claim 9, characterized in that: The first phase change heat storage part or the second phase change heat storage part is internally provided with one heat storage cavity or two or more independent heat storage cavities.

Images