A phase-change heat storage and dissipation structure device with interval distribution

Abstract

The utility model discloses a kind of interval type distributed two-phase change heat storage and heat dissipation structure device, the device includes metal matrix, the upper surface heat source contact surface of the metal matrix is equipped with high heat conduction heat pipe, the lower surface of the metal matrix is equipped with water cooling plate, serpentine or spiral water channel is arranged in water cooling plate, the metal matrix is equipped with several guide ribs, several guide ribs divide the metal matrix into several first phase change material filling cavities and second phase change material filling cavities, respectively set up PCM1 and PCM2 two flow channels, as the flow channel filled with phase change material;The structure design of the application is relatively simple, the material and component used are easy to obtain, the processing technology involved is mature, and it is convenient to make and large-scale popularization and application.

Description

Technical Field

[0001] This utility model belongs to the field of heat storage and heat dissipation technology, specifically relating to a two-phase change heat storage and heat dissipation structure device with intermittent distribution. Background Technology

[0002] With energy shortages and increasingly stringent environmental requirements, thermal energy storage technology has garnered widespread attention as a crucial means of efficient energy utilization. Phase change thermal energy storage technology, with its advantages of high thermal density and minimal temperature fluctuations, holds immense application potential in areas such as solar energy utilization, industrial waste heat recovery, laser cooling, and mobile device heat dissipation. However, existing phase change thermal energy storage devices generally suffer from poor heat transfer performance. On the one hand, the low thermal conductivity of phase change materials leads to slow heat transfer within them, affecting heat storage and release efficiency; and the temperature control accuracy of a single phase change material is low when the heat power is high. On the other hand, traditional phase change thermal energy storage devices have shortcomings in their heat transfer structure design, resulting in uneven longitudinal and lateral heat transfer, further restricting the overall heat transfer effect. In addition, the material after phase change often requires a long time to recover to its pre-phase-change state, limiting the operating time of the phase change thermal energy storage device and making it difficult to meet the continuous operation requirements of practical applications. Summary of the Invention

[0003] To address the problems in the technical background, the purpose of this utility model is to propose an intermittently distributed dual-phase change heat storage and heat dissipation structure device. By optimizing the heat transfer structure, two different PCMs (phase change materials) with similar phase change temperatures are added intermittently inside the device, along with the reasonable addition of high thermal conductivity materials and internal cooling water channels. This effectively improves the phase change heat transfer effect, shortens the recovery time of the phase change materials, and thus extends the working time of the phase change heat storage device.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A two-phase change material (PCM) heat storage and heat dissipation structure device with intermittent distribution, the device includes a metal substrate, a heat pipe on the heat source contact surface of the upper surface of the metal substrate, two PCM channels (PCM1 channel and PCM2 channel) inside the metal substrate, a water-cooled plate on the lower surface of the metal substrate with water channels inside the water-cooled plate, and a plurality of guide ribs inside the metal substrate, the guide ribs dividing the interior of the metal substrate into a plurality of first phase change material filling cavities and second phase change material filling cavities, the cavities being filled with PCM1 and PCM2 respectively, so that the two phase change materials are intermittently distributed and filled in the metal substrate.

[0005] Furthermore, the guide ribs are arranged longitudinally, and the heat pipes are arranged laterally, so that they are staggered.

[0006] Furthermore, the first and second phase change material filling cavities are primarily filled with alkane-based composite phase change materials, but other inorganic or organic phase change materials can be added as needed. A key feature is the alternating arrangement of two phase change materials with a phase change temperature difference of 5-8°C. Typically, the phase change temperature of the material in the second phase change material filling cavity is lower than that of the material in the first phase change material filling cavity. This allows for more uniform heat storage and dissipation.

[0007] Furthermore, the first phase change material filling cavity and the second phase change material filling cavity are filled with a high thermal conductivity material, which is a metal powder or a graphite carbon material.

[0008] Furthermore, two filling channels are reserved.

[0009] Furthermore, the waterway is arranged in a serpentine or spiral shape.

[0010] Traditional phase change thermal storage and heat dissipation devices typically use a single inorganic or organic material as the internal phase change material. These materials are unmodified, have low thermal conductivity, and primarily utilize the latent heat of the PCM (phase change material module). Once the latent heat is depleted, further temperature control becomes impossible. The above-mentioned technical solution offers the following advantages: This invention improves the phase change heat transfer effect: by adding phase change material and high thermal conductivity material into the phase change material filling cavity, and by optimizing the longitudinal and transverse heat transfer structure, the thermal conductivity and heat transfer rate of the phase change material are significantly improved, making the heat storage and heat release process more efficient. Shorten the recovery time of phase change materials: The internal water channels can quickly remove or provide heat through circulating water, which speeds up the recovery of the material after phase change to its pre-phase change state, thereby improving the working efficiency of the phase change thermal storage device. Improved temperature control accuracy: By using a two-phase change material intermittent filling method, the PCM1 at a lower temperature can exert its latent heat in a shorter time after the PCM2 is filled, further suppressing the temperature rise and thus improving temperature control accuracy.

[0011] Extended operating time: Due to the improved heat transfer effect and shortened recovery time of phase change, phase change thermal storage devices can complete the heat storage and heat release cycle more quickly, extending their operating time and meeting the needs of some industries in practical applications. Simple structure and easy to implement: The structural design of this invention is relatively simple, the materials and components used are easy to obtain and manufacture, and the processing technology involved is mature, making it easy to promote and apply on a large scale. Highly adaptable: The shape, size, type of phase change material, amount of high thermal conductivity material added, and arrangement of water channels of the metal plate can be adjusted according to different application scenarios and needs, thus exhibiting strong adaptability. Attached Figure Description

[0012] Figure 1 This is a diagram of the internal structure.

[0013] Figure 2 This is a structural diagram of the device.

[0014] Figure 3 This is a schematic diagram of the PCM flow channel.

[0015] In the figure: 1. Metal substrate; 2. Heat pipe; 3. First phase change material filling cavity; 4. Second phase change material filling cavity; 5. Guide rib; 6. Water channel; 7. Water cooling plate; 8. PCM1 flow channel; 9. PCM2 flow channel. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings: like Figure 1-3 As shown, a two-phase change thermal storage and heat dissipation structure device with intermittent distribution is disclosed. The device includes a metal substrate 1, which in this embodiment is cuboid. The upper surface of the metal substrate 1 is the heat source contact surface. The metal substrate 1 is provided with two PCM1 flow channels 8 and PCM2 flow channels 9. (See detailed drawing). Figure 2 and 3 Primarily for facilitating the filling and packing of phase change materials, the heat source contact surface is provided with several heat pipes 2, which are arranged horizontally and parallelly. A water-cooling plate 7 is provided on the lower surface of the metal substrate 1, and a serpentine water channel 6 is provided within the water-cooling plate 7. A schematic diagram of the water channel is shown below. Figure 2 The water channels can be arranged in a serpentine or spiral shape to increase the contact area with the phase change material and improve heat exchange efficiency. The inlet and outlet of the water channels can be connected to an external circulating water system. The flow of circulating water removes the heat released by the phase change material during the exothermic process or provides heat during the heat storage process, thereby accelerating the recovery of the phase change material's state. The metal substrate 1 has several longitudinally arranged guide ribs 5, which divide the interior of the metal substrate 1 into several first phase change material filling cavities 3 and second phase change material filling cavities 4, with their spacing and separation effect shown in the figure. Figure 1 The phase change material filled in the first phase change material filling cavity 3 has a phase change temperature of about 35 degrees Celsius. This phase change temperature material is chosen because in many application scenarios, such as laser module cooling, mobile devices, robots, drones, etc., about 35 degrees Celsius is a critical temperature point that can meet the actual heat storage and heat release requirements. The phase change material filled in the second phase change material filling cavity 4 has a phase change temperature lower than that of the phase change material in the first phase change material filling cavity, which is about 28 degrees Celsius. The material can be organic phase change material, inorganic phase change material, or composite phase change material, etc., and the specific selection can be based on factors such as material performance and cost.

[0017] Based on the above embodiments: the metal substrate is made of a metal material with good thermal conductivity, such as aluminum or copper. The shape and size of the metal plate can be designed according to actual application requirements to provide sufficient space to accommodate the phase change material and ensure good heat transfer performance.

[0018] Based on the above embodiments, high thermal conductivity materials are added to the first phase change material filling cavity 3 and the second phase change material filling cavity 4 to improve the thermal conductivity of the phase change material and enhance the phase change heat transfer effect. The high thermal conductivity materials can be metal powders (such as copper powder, aluminum powder), carbon materials (such as graphene, carbon nanotubes), etc. The amount added can be adjusted according to actual conditions. Generally, adding an appropriate amount (5% to 25%) of high thermal conductivity material can significantly improve the thermal conductivity of the phase change material. Excessive addition under the same volume will reduce the PCM filling amount, decrease heat storage, and affect the temperature control effect.

[0019] This invention reduces longitudinal heat transfer resistance by rationally designing the thickness and structure of the metal substrate. For example, heat-conducting ribs can be set in the longitudinal direction of the metal substrate to enhance heat transfer and optimize longitudinal heat transfer. In the transverse direction of the metal substrate, heat pipes and high thermal conductivity materials are added to form a heat-conducting network, increasing the transverse heat transfer rate. Simultaneously, the rational arrangement of water channels makes transverse heat transfer more uniform and efficient.

[0020] Specific workflow: Heat storage (heat absorption) process: When the ambient temperature is higher than the phase change temperature (around 28 degrees Celsius) of the phase change material in the second phase change material filling cavity, heat is transferred to the phase change material through the metal plate. The phase change material absorbs the heat and undergoes a phase change (from solid to liquid), storing the absorbed heat. When the temperature continues to rise to 35 degrees Celsius, the phase change material in the first phase change material filling cavity will repeat the heat absorption process of the phase change material in the second phase change material filling cavity, thereby further controlling the temperature under ideal conditions, allowing the working equipment to operate for as long as possible with a small temperature difference. High thermal conductivity materials and heat-conducting ribs accelerate the heat transfer inside the phase change material, and the optimization of the longitudinal and transverse heat transfer structure ensures that heat can be absorbed by the phase change material quickly and uniformly. Heat release process: When the ambient temperature is lower than the phase change temperature of the phase change material, the phase change material releases the stored heat and undergoes a phase change (from liquid to solid). The heat is transferred to the external environment through the metal plate. At this time, the circulating water in the channel can stop flowing or flow slowly as needed to ensure that the phase change material can fully release heat. Recovery Process: After the exothermic process ends, the phase change material becomes solid, allowing the supporting equipment to enter the next operating state. During the recovery process, the high thermal conductivity material and optimized heat transfer structure also play a role, accelerating heat transfer and shortening the recovery time.

[0021] The above descriptions are all preferred embodiments of this utility model. For those skilled in the art, any modifications to this utility model in various equivalent forms without departing from the principle of this utility model shall fall within the protection scope of the appended claims.

Claims

1. A two-phase variable thermal energy storage and heat dissipation structure device with intermittent distribution, characterized in that: The device includes a metal substrate (1), a heat pipe (2) is provided on the heat source contact surface of the upper surface of the metal substrate (1), two PCM1 flow channels (8) and PCM2 flow channels (9) are provided inside the metal substrate (1), a water cooling plate (7) is provided on the lower surface of the metal substrate (1), a water channel (6) is provided inside the water cooling plate (7), and a number of guide ribs (5) are provided inside the metal substrate (1), which divide the interior of the metal substrate (1) into a number of first phase change material filling cavities (3) and second phase change material filling cavities (4).

2. The two-phase variable thermal energy storage and heat dissipation structure device with intermittent distribution according to claim 1, characterized in that: The guide ribs (5) are arranged longitudinally, and the heat pipes (2) are arranged laterally, with the two arranged in an alternating pattern.

3. The two-phase variable thermal storage and heat dissipation structure device with intermittent distribution according to claim 1, characterized in that: The first phase change material filling cavity (3) and the second phase change material filling cavity (4) are filled with one of alkane composite phase change material, inorganic material, or phase change material. The phase change temperature difference between the two phase change materials is 5-8℃. The phase change temperature of the material filled in the second phase change material filling cavity (4) is lower than that of the material filled in the first phase change material filling cavity (3).

4. A two-phase variable thermal storage and heat dissipation structure device with intermittent distribution according to claim 1 or 3, characterized in that: The first phase change material filling cavity (3) and the second phase change material filling cavity (4) are filled with a high thermal conductivity material, which is a metal powder or a carbon material.

5. The two-phase variable thermal storage and heat dissipation structure device with intermittent distribution according to claim 1, characterized in that: The waterways are arranged in a serpentine or spiral pattern.

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