Radiation refrigeration device, refrigeration device module and radiation refrigeration system

Abstract

The utility model discloses a radiation refrigeration device, a refrigeration device module and a radiation refrigeration system. The radiation refrigeration device comprises a metal plate and a radiation refrigeration film. One surface of the metal plate is a plane, and a plurality of water flow straight channels with circular sections are uniformly distributed on the metal plate; and the radiation refrigeration film is paved on the plane. The radiation refrigeration device is good in radiation refrigeration power performance, simple in structure and low in cost.

Description

Technical Field

[0001] The utility model relates to the fields of refrigeration energy conservation and radiative cooling, and particularly relates to a radiative cooling device, a refrigeration device module and a radiative cooling system. Background Art

[0002] Based on the zero-energy radiative cooling technology, it can not only meet the human thermal management needs in a carbon-neutral manner, but also meet the environmental and resource sustainability requirements of carbon peak. The radiative cooling system can be applied in many aspects, such as building cooling, electronic device heat dissipation, solar panel cooling, etc. Among them, the application in data centers is also very important. As a high-energy-consuming facility, data centers urgently need efficient and low-energy-consuming cooling solutions to reduce operating costs and carbon emissions. At present, most of the research on radiative cooling applications focuses on the simulation level, and the engineering application is still in the preliminary research stage, without a mature and comprehensive radiative cooling system design. Since the performance of the radiative cooling system is closely related to environmental factors, especially the influence of solar radiation and humidity is relatively large. Therefore, optimizing the design and operation of the radiative cooling system to adapt to these environmental changes is very important for achieving the best cooling efficiency under different climate conditions. In particular, as a device for dissipating heat to outer space, different structures of the radiative cooling device will have a greater impact on the performance of radiative cooling. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the utility model is to provide a radiative cooling device with good radiative cooling power performance, simple structure and low cost.

[0004] The radiative cooling device according to the embodiment of the utility model includes:

[0005] A metal plate, one surface of the metal plate is a plane, and a plurality of straight water channels with circular cross-sections are evenly distributed on the metal plate;

[0006] A radiative cooling film, which is laid on the plane.

[0007] The radiative cooling device of the embodiment of the present utility model fully considers the advantages of radiative heat dissipation as an auxiliary cold source in the application project of the cooling system. According to the heat transfer principle analysis, a numerical model of the radiative cooling device is established, the operating performance of the radiative cooling device is simulated and analyzed, the heat exchange effect of the radiative cooling device under different working conditions and conditions is analyzed and compared, and the main factors affecting the radiative cooling performance are calculated and analyzed. By optimizing the structural form of the radiative cooler, one side of the metal plate is designed as a flat surface, a radiative cooling film is pasted on this flat surface, and a plurality of uniformly distributed circular straight water channels are arranged on the metal plate, so that the radiative cooling device maximizes the radiative cooling power within a limited space as much as possible. The structure of the present utility model is simple, the cost is low, and it is a space radiative cooler suitable for practical engineering use.

[0008] In some embodiments, the plurality of straight water channels are formed by a plurality of circular tubes welded on the other surface of the metal plate.

[0009] In some embodiments, it further includes a plurality of fins, and the plurality of fins are welded and fixed on the other surface of the metal plate and are alternately arranged with the plurality of circular tubes.

[0010] In some embodiments, the fins are rectangular.

[0011] In some embodiments, the straight water channels are distributed within the metal plate.

[0012] In some embodiments, the metal plate is an aluminum plate.

[0013] In some embodiments, the metal plate is rectangular, the length and width of the metal plate are 1.8 - 2.2 m and 0.9 - 1.1 m respectively, and the length of the straight water channel is the same as the length or width of the metal plate.

[0014] In some embodiments, the radial dimension of the straight water channel is 5 - 30 mm.

[0015] The present utility model also proposes a refrigeration device module.

[0016] The refrigeration device module according to the embodiment of the present utility model includes a plurality of the radiative cooling devices of the embodiment of the present utility model, and the plurality of radiative cooling devices are connected in series and / or in parallel.

[0017] For the refrigeration device module according to the embodiment of the present utility model, since the radiative cooling power of a single radiative cooling device is limited, in the actual application process, if it is desired to reach the kilowatt level of the net cooling power of the radiative cooling system, a reasonable and feasible series, parallel or series-parallel structure needs to be designed to couple a plurality of radiative cooling devices in the overall radiative cooling system.

[0018] The present utility model also proposes a radiative cooling system.

[0019] The radiation cooling system according to an embodiment of the present utility model includes the refrigeration device module of the embodiment of the present utility model.

[0020] Since the radiation cooling system of the embodiment of the present utility model adopts the refrigeration device module of the embodiment of the present utility model, therefore, the radiation cooling system of the embodiment of the present utility model has the same technical effects as the refrigeration device module of the embodiment of the present utility model.

[0021] The additional aspects and advantages of the present utility model will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present utility model. Brief Description of the Drawings

[0022] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0023] Figure 1a is a front view schematic diagram of the radiation cooling device of the first embodiment of the present utility model;

[0024] Figure 1b is a three-dimensional schematic diagram of the radiation cooling device of the first embodiment of the present utility model;

[0025] Figure 2a is a front view schematic diagram of the radiation cooling device of the second embodiment of the present utility model;

[0026] Figure 2b is a three-dimensional schematic diagram of the radiation cooling device of the second embodiment of the present utility model;

[0027] Figure 3a is a front view schematic diagram of the radiation cooling device of the third embodiment of the present utility model;

[0028] Figure 3b is a three-dimensional schematic diagram of the radiation cooling device of the third embodiment of the present utility model;

[0029] Figure 4a is a front view schematic diagram of the radiation cooling device of the fourth embodiment of the present utility model;

[0030] Figure 4b is a three-dimensional schematic diagram of the radiation cooling device of the fourth embodiment of the present utility model;

[0031] Figure 5a is a front view schematic diagram of the radiation cooling device of the fifth embodiment of the present utility model;

[0032] Figure 5b is a three-dimensional schematic diagram of the radiation cooling device of the fifth embodiment of the present utility model;

[0033] Figure 6a A schematic diagram of a radiant cooling system according to an embodiment of the present invention;

[0034] Figure 6b It is a schematic diagram of a radiant cooling system according to another embodiment of the present invention.

[0035] Reference numerals:

[0036] Radiative cooling device 1000; refrigeration device module 2000; radiative cooling system 3000;

[0037] Metal plate 1; straight water flow channel 2; fin 3; radiation cooling film 4; water cooling box 5; heat exchange plate 6. DETAILED DESCRIPTION

[0038] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0039] Combine the following Figures 1a to 6b The radiant cooling device 1000, the refrigeration device module 2000 and the radiant cooling system 3000 according to the embodiments of the present invention are described.

[0040] like Figures 1a to 5b As shown, the radiation cooling device 1000 according to the embodiment of the utility model comprises a metal plate 1 and a radiation cooling film 4. Among them, one side of the metal plate 1 is a plane, which is used to lay the radiation cooling film 4, and a plurality of water flow straight channels 2 with circular cross-sections are evenly distributed on the metal plate 1. The water flow straight channels 2 adopt circular cross-sections, which have the following advantages: the inner wall of the water flow straight channel 2 is evenly stressed and there is no stress concentration point; second, the fluid resistance is small, because the inner wall of the water flow straight channel 2 is continuous and smooth, and the resistance of the fluid flowing therein is small, which reduces energy loss and pumping energy consumption. At the same time, the circular cross-section provides the minimum surface area to volume ratio, which is conducive to reducing friction and resistance; third, the manufacturing cost is low, because the manufacturing process is relatively mature and common; fourth, the flow cross-section of the fluid in the water flow straight channel 2 is uniform, and it is not easy to have uneven flow velocity distribution, which helps to maintain a stable flow rate and pressure; the two ends of the plurality of water flow straight channels 2 can be respectively connected to the water inlet main pipe and the water outlet main pipe; the radiation cooling film 4 is laid on the plane.

[0041] The radiative cooling device 1000 according to the embodiment of the present utility model fully considers the advantages of radiative heat dissipation as an auxiliary cold source in the application project of the cooling system, designs according to the analysis of heat transfer principles, numerically models the radiative cooling device 1000, simulates and analyzes the operating performance of the radiative cooling device 1000, analyzes and compares the heat exchange effects of the radiative cooling device 1000 under different working conditions and conditions, calculates and analyzes the main factors affecting the radiative cooling performance, and through the optimization of the structural form of the radiative cooling device 1000, designs one side of the metal plate 1 into a flat surface, pastes the radiative cooling film 4 on this flat surface, and sets a plurality of evenly distributed circular water flow straight channels 2 on the metal plate 1, so that the radiative cooling device 1000 maximizes the radiative cooling power within a limited space as much as possible. The utility model has a simple structure, low cost, and is a space radiative cooler suitable for practical engineering use.

[0042] In some embodiments, such as Figures 1a to 1b and Figures 5a to 5b shown, a plurality of water flow straight channels 2 are formed by a plurality of round tubes welded on the other surface of the metal plate 1. The advantages of using round tubes are as follows: First, uniform stress: Since the round tube is uniformly stressed under internal and external pressures and has no stress concentration points, it can better withstand higher internal and external pressures without deformation; Second, small fluid resistance: The inner wall of the round tube is continuous and smooth, and the resistance of the fluid flowing through it is small, reducing energy loss and pumping energy consumption. At the same time, the circular cross-section provides the smallest surface area to volume ratio, which is beneficial to reducing friction and resistance; Third, low manufacturing cost: Since the manufacturing process of round tubes is relatively mature and common, the manufacturing cost is usually lower than that of square tubes. The manufacturing process of round tubes includes extrusion, welding, cold drawing, etc., with high efficiency and stable quality; Fourth, high material utilization rate: The circular cross-section is the most effective shape for using materials. Under the condition of the same perimeter, the area of the circular cross-section is the largest, so it has an advantage in terms of material utilization rate; Fifth, good corrosion resistance: The surface treatment of the round tube is relatively uniform, and it is not easy to have the problem of uneven coating due to complex shape, with better corrosion resistance and extended service life; Sixth, easy installation and maintenance: Round tubes are easy to connect, and pipe fittings (such as joints, valves, etc.) are designed standardly and widely used in the market. The structure of round tubes is simple, and cleaning and maintenance are more convenient; Seventh, uniform flow rate: The flow cross-section of the fluid in the round tube is uniform, and it is not easy to have uneven flow velocity distribution, which helps to maintain a stable flow rate and pressure; Eighth, good bending and torsion resistance: Round tubes have better performance when subjected to bending and torsion and are not easy to deform, which makes them perform better in application scenarios that need to withstand bending or torsion forces.

[0043] In some embodiments, such as Figures 1a to 1b and Figures 5a to 5bAs shown, it further includes a plurality of fins 3, and the plurality of fins 3 are welded and fixed on the other surface of the metal plate 1 and are arranged alternately with the plurality of round tubes. Thus, the radiation cooling device 1000 of this embodiment is convenient to process and can better maximize the radiation cooling power within a limited space range.

[0044] In some embodiments, the fin 3 is rectangular. Thus, the radiation cooling device 1000 of this embodiment is convenient to process and can better maximize the radiation cooling power within a limited space range.

[0045] In some embodiments, as Figures 2a to 4b shown, the straight water channels 2 are distributed in the metal plate 1. That is to say, the straight water channels 2 are directly processed in the metal plate 1 by punching, which is convenient to process and is beneficial for the radiation cooling device 1000 to maximize the radiation cooling power as much as possible within a limited space range.

[0046] In some embodiments, the metal plate 1 is an aluminum plate, and the aluminum plate is beneficial for the radiation cooling device 1000 to maximize the radiation cooling power as much as possible within a limited space range. The metal plate 1 can also be selected from other metal materials.

[0047] In some embodiments, the metal plate 1 is rectangular, the length and width of the metal plate 1 are 1.8 - 2.2 m and 0.9 - 1.1 m respectively, and the length of the straight water channel 2 is the same as the length or width of the metal plate 1. The size of the radiation cooling device 1000 needs to consider the installation location, installation method of the actual engineering application and the size of the radiation cooling film.

[0048] For example, Figure 1a and Figure 1b for the radiation cooling device 1000, the length and width of the metal plate 1 are 2 m and 1 m respectively, the length of the straight water channel 2 is 2 m, the number of the straight water channels 2 is 10, the number of the fins 3 is 20, 2 fins 3 are arranged between every two adjacent straight water channels 2, and 1 fin 3 is arranged on the outside of each of the two outermost straight water channels 2. Figure 2a and Figure 2b for the radiation cooling device 1000, the length and width of the metal plate 1 are 2 m and 1 m respectively, the length of the straight water channel 2 is 2 m, and the number of the straight water channels 2 is 10. Figure 3a and Figure 3b for the radiation cooling device 1000, the length and width of the metal plate 1 are 2 m and 1 m respectively, the length of the straight water channel 2 is 2 m, and the number of the straight water channels 2 is 20. Figure 4a and Figure 4b for the radiation cooling device 1000, the length and width of the metal plate 1 are 2 m and 1 m respectively, the length of the straight water channel 2 is 1 m, and the number of the straight water channels 2 is 20. Figure 5a and Figure 5bThe length and width of the metal plate 1 of the radiative cooling device 1000 are 2 m and 1 m respectively. The length of the straight water channel 2 is 1 m, the number of the straight water channels 2 is 20, the number of the fins 3 is 40. There are 2 fins 3 arranged between every two adjacent straight water channels 2, and 1 fin 3 is arranged outside each of the two outermost straight water channels 2.

[0049] In some embodiments, the radial dimension of the straight water channel 2 is 5 - 30 mm. Selecting an appropriate pore size according to the actual requirements of radiative cooling engineering can effectively manage the flow rate. Selecting the radial dimension of the straight water channel for the radiative cooling device 1000 needs to consider various factors, including the thermal load of the system, fluid flow rate, pressure loss, installation space, etc. Generally speaking, the straight water channel in the radiative cooling system 3000 needs to ensure sufficient cooling capacity while maintaining the efficiency and stability of the system. The smaller the radial dimension of the straight water channel, the greater the pressure loss per unit length. Select an appropriate radial dimension of the straight water channel to balance the pressure loss and flow rate requirements and ensure the system efficiency.

[0050] As Figure 6a and Figure 6b shown, the present utility model also proposes a refrigeration device module 2000.

[0051] The refrigeration device module 2000 according to the embodiment of the present utility model includes a plurality of radiative cooling devices 1000 according to the embodiments of the present utility model, and the plurality of radiative cooling devices 1000 are connected in series or / and in parallel. That is to say, a plurality of radiative cooling devices 1000 are connected in series to form the refrigeration device module 2000, or a plurality of radiative cooling devices 1000 are connected in parallel to form the refrigeration device module 2000, or a plurality of radiative cooling devices 1000 are connected in series-parallel to form the refrigeration device module 2000. Figure 6a The refrigeration device module 2000 in Figure 6b is obtained by first connecting two parts of the plurality of radiative cooling devices 1000 in series and then in parallel.

[0052] For the refrigeration device module 2000 according to the embodiment of the present utility model, since the radiative cooling power of a single radiative cooling device 1000 is limited, in the actual application process, if it is desired to reach the kilowatt level for the net cooling power of the radiative cooling system 3000, it is necessary to design a reasonable and feasible series, parallel or series-parallel structure to couple a plurality of radiative cooling devices 1000 in the overall radiative cooling system 3000.

[0053] As Figure 6a and Figure 6b shown, the present utility model also proposes a radiative cooling system 3000.

[0054] The radiation cooling system 3000 according to an embodiment of the present utility model includes a refrigeration device module 2000 according to an embodiment of the present utility model, and the refrigeration device module 2000 can be connected between a water cooling box 5 and a heat exchange plate 6.

[0055] Since the radiation cooling system 3000 according to an embodiment of the present utility model adopts the refrigeration device module 2000 according to an embodiment of the present utility model, the radiation cooling system 3000 according to an embodiment of the present utility model has the same technical effects as the refrigeration device module 2000 according to an embodiment of the present utility model.

[0056] In the description of this specification, the descriptions with reference to terms such as "an embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0057] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A radiation cooling device, characterized in that: include: A metal plate, one side of which is a plane, and a plurality of straight water flow channels with circular cross-sections are evenly distributed on the metal plate; A radiation cooling film is laid on the plane.

2. The radiative cooling device according to claim 1, characterized in that: The plurality of straight water flow channels are formed by a plurality of round tubes welded on the other surface of the metal plate.

3. The radiative cooling device according to claim 2, characterized in that: It also includes a plurality of fins, which are welded and fixed on the other side of the metal plate and are arranged alternately with the plurality of round tubes.

4. The radiative cooling device according to claim 3, characterized in that: The fin is rectangular.

5. The radiative cooling device according to claim 1, characterized in that: The straight water flow channels are distributed in the metal plate.

6. The radiative cooling device according to any one of claims 1 to 5, characterized in that: The metal plate is an aluminum plate.

7. The radiative cooling device according to claim 1, characterized in that: The metal plate is rectangular, and the length and width of the metal plate are 1.8-2.2 m and 0.9-1.1 m respectively. The length of the straight water flow channel is consistent with the length or width of the metal plate.

8. The radiative cooling device according to claim 1, characterized in that: The radial dimension of the water flow straight channel is 5 to 30 mm.

9. A refrigeration device module, characterized in that: It comprises a plurality of radiation cooling devices as claimed in any one of claims 1 to 8, wherein the plurality of radiation cooling devices are connected in series or / and in parallel.

10. A radiant cooling system, characterized in that: Comprising the refrigeration device module as claimed in claim 9.

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