Micro-channel heat pipe for improving generating capacity of double-sided double-glass battery assembly and photovoltaic assembly

Abstract

The utility model belongs to the technical field of photovoltaic power generation. The micro-channel heat pipe comprises a heat pipe body, the heat pipe body comprises a first plate piece, a second plate piece and a third plate piece, the first plate piece is parallel to the third plate piece, the first plate piece and the third plate piece are integrally formed and connected through the second plate piece, and the first plate piece and the third plate piece are connected through the first plate piece and the second plate piece. Continuous micro-channels are formed in inner cavities of the first plate, the second plate and the third plate; the lower bottom surface of the third plate is attached to the orthographic projection part of the frame of the double-sided double-glass solar cell module on the back surface of the photovoltaic cell, the lower bottom surface of the first plate is attached to the outer surface of the frame, and the second plate is located on the inner side of the frame; according to the utility model, the problems that the generating capacity is reduced and the gap area of the double-sided double-glass assembly is insufficient due to temperature rise in the operation process of the photovoltaic panel at present are solved, the heat transfer area is increased, and the heat transfer performance of the heat pipe is improved.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic power generation technology, and in particular to a microchannel heat pipe and photovoltaic module for improving the power generation of bifacial double-glass solar cell modules. Background Technology

[0002] The statements in this section are merely background information related to this utility model and do not necessarily constitute prior art.

[0003] Crystalline silicon solar cells are currently the mainstream type of solar power generation. Temperature is one of the factors that causes the degradation of power generation efficiency. Although bifacial double-glass solar cell modules have better heat dissipation than single-glass modules, the photothermal conversion efficiency is still affected by temperature. Active temperature control methods offer good temperature control, but the systems are complex and require additional energy, making them unsuitable for large-scale photovoltaic power generation. Therefore, passive temperature control remains the best method for controlling the temperature of bifacial double-glass solar cell modules.

[0004] Heat pipes are highly efficient heat transfer elements and are widely used in temperature control. Patent CN202320028178.1 discloses a U-shaped microchannel heat pipe for temperature control of single-sided photovoltaic modules. The evaporation section of the hollow shell of the U-shaped heat pipe is bonded to the backplate of the single-sided module, enabling rapid heat transfer from the backplate to the air, thereby improving the power generation efficiency of the solar cell array. CN117367177A discloses a TEC-coupled loop heat pipe and its temperature control method, with the evaporator placed on the upper surface of the heat source plate. The inventors have found that existing temperature control solutions are mostly designed for surface heat sources. To improve heat transfer, the evaporation end of the heat pipe is bonded to the hot surface. However, this is not suitable for bifacial photovoltaic modules, as it would cause the back of the bifacial double-glass solar cell module to lose its power generation function. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a microchannel heat pipe and photovoltaic module for improving the power generation of bifacial double-glass solar cell modules. It solves the problems of reduced power generation due to temperature rise during photovoltaic panel operation and insufficient void area in bifacial double-glass modules. It increases the heat transfer area and, under heat exchange conditions with low temperature difference, can transfer a large amount of heat from the evaporation section (the higher temperature end) of the heat pipe to the condensation section (the higher temperature end), thereby improving the heat transfer performance of the heat pipe.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] In the first aspect, this utility model provides a microchannel heat pipe for improving the power generation of a bifacial double-glass solar cell module.

[0008] A microchannel heat pipe for improving the power generation of bifacial double-glass solar cell modules includes: a heat pipe body, the heat pipe body including a first plate, a second plate and a third plate, the first plate and the third plate being parallel to each other, and the first plate and the third plate being integrally connected through the second plate, and the inner cavities of the first plate, the second plate and the third plate having continuous microchannels.

[0009] The bottom surface of the third plate is attached to the part of the frame of the double-sided double-glass solar cell module that is projected onto the back of the photovoltaic cell. The bottom surface of the first plate is attached to the outer surface of the frame, and the second plate is located inside the frame.

[0010] As a further limitation of the first aspect of this utility model, the heat pipe body is provided with multiple continuous and closed-loop microchannels arranged in parallel with each other.

[0011] As a further limitation of the first aspect of this utility model, the microchannel is filled with a working fluid, which is water or R134a.

[0012] As a further limitation of the first aspect of this utility model, the adjacent microchannels arranged in parallel to each other are spaced at the same interval.

[0013] As a further limitation of the first aspect of this utility model, the distance between the bottom surface of the third plate and the bottom surface of the first plate is equal to the distance between the frame and the back of the photovoltaic module.

[0014] As a further definition of the first aspect of this utility model, multiple heat pipe bodies are arranged along the entire rectangular frame.

[0015] As a further definition of the first aspect of this utility model, the microchannel has a horizontal U-shaped structure, and the first plate, the second plate and the third plate have a U-shaped structure.

[0016] As a further limitation of the first aspect of this utility model, the cross-section of the internal microchannel is rectangular, with a width ranging from 1mm to 2mm and a height ranging from 0.8mm to 1mm.

[0017] As a further limitation of the first aspect of this utility model, the heat pipe body is made of aluminum or copper.

[0018] Secondly, this utility model provides a photovoltaic module, including the microchannel heat pipe for improving the power generation of a bifacial double-glass cell module as described in the first aspect of this utility model.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. This utility model innovatively proposes a microchannel heat pipe for improving the power generation of bifacial double-glass solar cell modules. Its shape is a horizontal U-shaped structure. The upper and lower surfaces of the heat pipe are in contact with the back panel and the frame of the photovoltaic panel, respectively. It makes full use of the space of the photovoltaic panel, thereby realizing the transfer of heat from the photovoltaic panel to the air through the microchannel heat pipe without affecting the power generation on the back of the bifacial double-glass photovoltaic module or the installation of the photovoltaic panel.

[0021] 2. The heat pipe of this utility model has multiple evenly spaced parallel microchannels inside, and each microchannel is filled with working fluid, which increases the heat transfer area. Under heat exchange conditions with low temperature difference, a large amount of heat can be transferred from the evaporation section of the heat pipe, i.e. the end with higher temperature, to the condensation section, i.e. the end with higher temperature, thereby improving the heat transfer performance of the heat pipe.

[0022] 3. During the day, when there is solar radiation, the temperature of the photovoltaic panel rises. The working medium in the end of the heat pipe that contacts the back of the photovoltaic panel absorbs heat and evaporates rapidly. The working medium in each microchannel flows to the other end that contacts the frame and condenses, releasing heat and becoming liquid. Due to gravity, it returns to the end that contacts the back of the photovoltaic panel. This cycle repeats, transferring excess heat from the photovoltaic panel to the air, thus achieving effective cooling of the photovoltaic panel.

[0023] Advantages of the present invention in additional aspects will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0025] Figure 1 A schematic diagram of the overall structure of a microchannel heat pipe used to improve the power generation of a bifacial double-glass solar cell module;

[0026] Figure 2 for Figure 1 Sectional view along axis AA;

[0027] Figure 3 for Figure 1 BB-direction sectional view;

[0028] Figure 4 This is a schematic diagram of the installation of a microchannel heat pipe used to improve the power generation of a bifacial double-glass solar cell module.

[0029] In the diagram, 1 is the heat pipe body; 2 is the first plate; 3 is the second plate; 4 is the third plate; 5 is the microchannel; 6 is the working fluid; 7 is the frame; and 8 is the photovoltaic panel. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0032] Where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0033] Example 1:

[0034] In this implementation, a microchannel heat pipe for improving the power generation of a bifacial double-glass solar cell module is proposed, comprising: a heat pipe body 1, wherein the heat pipe body 1 includes a first plate 2, a second plate 3 and a third plate 4, the first plate 2 and the third plate 4 are parallel to each other, and the first plate 2 and the third plate 4 are integrally connected through the second plate 3, and the inner cavities of the first plate 2, the second plate 3 and the third plate 4 are provided with continuous microchannels 5;

[0035] The bottom surface of the third plate 4 is attached to the part of the double-sided double-glass solar cell module frame 7 that is projected onto the back of the photovoltaic cell. The bottom surface of the first plate 2 is attached to the outer surface of the frame 7. The second plate 3 is located inside the frame 7.

[0036] In this implementation, preferably, the first plate 2, the second plate 3, and the third plate 4 form a horizontal U-shaped structure (that is, the U-shaped structure is laid flat horizontally).

[0037] In this implementation, preferably, the heat pipe body 1 is provided with multiple parallel and equally spaced continuous and closed-loop microchannels 5, the microchannels 5 having a horizontal U-shaped structure; more specifically, the cross-section of the internal microchannels 5 is rectangular, with a width ranging from 1mm to 2mm and a height ranging from 0.8mm to 1mm.

[0038] In this implementation, preferably, the microchannel 5 is filled with a working medium 6, which can be water or R134a.

[0039] In this implementation, preferably, the distance between the bottom surface of the third plate 4 and the bottom surface of the first plate 2 is equal to the distance between the frame 7 and the back of the photovoltaic module, so that the bottom surface of the third plate 4 is in close contact with the back of the photovoltaic cell and the bottom surface of the first plate 2 is in close contact with the outer surface of the frame 7.

[0040] In this implementation, preferably, excluding the positions of the mounting holes in the frame 7, multiple heat pipe bodies 1 are arranged along the entire rectangular frame 7, and the total width of each heat pipe body 1 is determined according to the spacing between the mounting holes.

[0041] In this implementation, preferably, the heat pipe body 1 is made of a good conductor such as aluminum or copper.

[0042] In this implementation, preferably, thermally conductive silicone grease is used to fill the gaps between the two sides of the heat pipe body 1 and the back of the battery panel and the outer surface of the frame 7, respectively, to ensure full contact.

[0043] The working process of the heat pipe body 1 of this utility model is as follows: During the day, when there is solar radiation, the temperature of the photovoltaic panel 8 rises. The working medium in the end of the heat pipe that contacts the back of the photovoltaic panel 8 absorbs heat and evaporates rapidly. The working medium in each microchannel 5 flows to the first plate 2 that contacts the frame 7 and condenses, releasing heat and becoming liquid. Due to gravity, it returns to the second plate 3 that contacts the back of the photovoltaic panel 8. This cycle repeats, transferring excess heat from the photovoltaic panel 8 to the air, thereby cooling the photovoltaic panel 8.

[0044] Example 2:

[0045] This implementation provides a photovoltaic module, including the microchannel heat pipe for improving the power generation of a bifacial double-glass solar cell module as described in Embodiment 1 of this utility model.

[0046] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A micro-channel heat pipe for improving the power generation of a bifacial double-glass solar cell module, characterized in that, the heat pipe body comprises a first plate, a second plate and a third plate, the first plate and the third plate are parallel to each other, and the first plate and the third plate are integrally connected by the second plate, and the inner cavity of the first plate, the second plate and the third plate is provided with continuous micro-channels; comprising: the lower bottom surface of the third plate is attached to the part of the frame outer surface of the bifacial double-glass solar cell module, the lower bottom surface of the first plate is attached to the part of the frame outer surface of the bifacial double-glass solar cell module, and the second plate is located inside the frame. 2.The micro-channel heat pipe for improving the power generation of a bifacial double-glass solar cell module according to claim 1, characterized in that, a plurality of continuous and closed-loop micro-channels are arranged in the heat pipe body. 3.The micro-channel heat pipe for improving the power generation of a bifacial double-glass solar cell module according to claim 2, characterized in that, the micro-channels are filled with a working medium, and the working medium is water or R134a. 4.The micro-channel heat pipe for improving the power generation of a bifacial double-glass solar cell module according to claim 2, characterized in that, the spacing of adjacent parallel micro-channels is the same. 5.The micro-channel heat pipe for improving the power generation of a bifacial double-glass solar cell module according to claim 2, characterized in that, the distance between the lower bottom surface of the third plate and the lower bottom surface of the first plate is equal to the distance between the frame and the back surface of the photovoltaic module. 6.The micro-channel heat pipe for improving the power generation of a bifacial double-glass solar cell module according to claim 2, characterized in that, a plurality of heat pipe bodies are arranged along the entire rectangular frame. 7.The micro-channel heat pipe for improving the power generation of a bifacial double-glass solar cell module according to any one of claims 1-6, characterized in that, the micro-channels are in a horizontal U-shaped structure, and the first plate, the second plate and the third plate are in a U-shaped structure. 8.The micro-channel heat pipe for improving the power generation of a bifacial double-glass solar cell module according to any one of claims 1-6, characterized in that, the cross section of the internal micro-channels is rectangular, the width ranges from 1mm to 2mm, and the height ranges from 0.8mm to 1mm. 9.The micro-channel heat pipe for improving the power generation of a bifacial double-glass solar cell module according to any one of claims 1-6, characterized in that, the material of the heat pipe body is aluminum or copper. The micro-channel heat pipe for improving the power generation of a bifacial double-glass solar cell module according to any one of claims 1-9.

10. A photovoltaic module, characterized by, ​

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