Photovoltaic and photo-thermal integrated device

Abstract

The utility model discloses a photovoltaic photo-thermal integrated device, which comprises a photovoltaic assembly and a heat collection assembly, the heat collection assembly comprises a first heat conduction plate, a second heat conduction plate and a working medium fluid channel, one side of the first heat conduction plate is welded with one side of the second heat conduction plate, the other side of the second heat conduction plate is bonded with the photovoltaic assembly, and the working medium fluid channel is connected with the photovoltaic assembly. The working medium fluid channel is located between the first heat conduction plate and the second heat conduction plate and communicates with an input pipeline and an output pipeline. The solar heat collector has the advantages of large contact area between working medium fluid and the heat conducting plate, good heat collection effect and convenience in installation.

Description

Technical Field

[0001] This utility model relates to the field of solar energy equipment technology, specifically to a photovoltaic-thermal integrated device. Background Technology

[0002] Traditional solar energy utilization methods are mainly divided into two categories: photovoltaic power generation and solar thermal utilization. These two methods often operate independently, failing to maximize solar energy utilization and creating competition between photovoltaic and solar thermal rooftops. The power generation efficiency of crystalline silicon solar cells depends on their operating temperature; every 1°C increase in temperature leads to a 0.4%–0.5% decrease in output power. Since over 80% of the energy reaching the cell surface is converted into heat, the operating temperature of solar cells is typically above 50°C, and can even reach 80°C when heat dissipation is poor, severely impacting the cell's efficiency.

[0003] In existing PVT photovoltaic-thermal integrated modules, the working fluid in the back-side collector typically uses a back-side outlet. This back-side outlet creates a protrusion that prevents installation on sloping roof surfaces. Furthermore, the solar thermal collector section uses internal piping to absorb the heat generated by the photovoltaic power generation, i.e., as... Figure 1 As shown, multiple stainless steel round tubes 7 are installed behind the heat-conducting backplate 6. During this process, heat is transferred into the stainless steel round tubes 7 through multiple transfers. A considerable amount of heat is lost in the process, resulting in low heat transfer efficiency and high thermal resistance. Furthermore, the stainless steel round tubes 7 and the heat-conducting backplate 6 are connected by a line, resulting in low heat collection efficiency and inability to absorb the heat generated on the entire photovoltaic power generation area. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a photovoltaic-thermal integrated device with a large contact area between the working fluid and the heat-conducting plate, good heat collection effect, and easy installation.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A photovoltaic-thermal integrated device includes a photovoltaic module and a heat collection module. The heat collection module includes a first heat-conducting plate, a second heat-conducting plate, and a working fluid channel. The first heat-conducting plate is welded to one side of the second heat-conducting plate, and the other side of the second heat-conducting plate is bonded to the photovoltaic module. The working fluid channel is located between the first heat-conducting plate and the second heat-conducting plate, and the working fluid channel is connected to an input pipe and an output pipe.

[0007] As a further improvement to the above technical solution:

[0008] The second heat-conducting plate has multiple uniformly arranged hexagonal grooves on the side near the working fluid channel.

[0009] The input and output pipes are respectively located at the diagonal points of the working fluid channel.

[0010] Both the input and output pipes are equipped with circulation pumps.

[0011] The first heat-conducting plate and the second heat-conducting plate are welded together.

[0012] The second heat-conducting plate is a graphene heat-conducting plate.

[0013] The first heat-conducting plate is a stainless steel heat-conducting plate.

[0014] The photovoltaic module includes photovoltaic glass and solar cells, and the photovoltaic glass and solar cells, as well as the solar cells and the second heat-conducting plate, are bonded together by photovoltaic adhesive film.

[0015] The photovoltaic glass, the battery cell, the first heat-conducting plate, and the second heat-conducting plate are surrounded by a frame.

[0016] The frame is made of aluminum alloy.

[0017] Compared with the prior art, the advantages of this utility model are:

[0018] The photovoltaic-thermal integrated device disclosed in this utility model uses a heat collection module instead of a traditional backplate. There is a working fluid channel between the first and second heat-conducting plates. The working fluid enters from the input pipe, carries away heat through the working fluid channel, and exits from the output pipe. The working fluid is in full contact with both the first and second heat-conducting plates. Compared with the traditional contact method of heat-conducting backplate + stainless steel round tube, the contact area is greatly increased, and the heat conduction and heat collection effect is better. Moreover, the first heat-conducting plate is easier to install than the stainless steel round tube because it has no convex surface. In addition, the second heat-conducting plate conducts heat generated by the photovoltaic module, while the first heat-conducting plate can absorb the reflected solar heat energy from the ground and the air heat energy, further improving the heat collection effect. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the heat-conducting backplate + stainless steel round tube 7 in the existing technology.

[0020] Figure 2 This is a schematic diagram of the main structure of the photovoltaic-thermal integrated device of this utility model.

[0021] Figure 3 This is a schematic diagram of the working fluid channel, input pipe, and output pipe in this utility model.

[0022] Figure 4 This is a schematic diagram of the heat collection component in this utility model.

[0023] Figure 5 This is a top view of the second heat-conducting plate and the hexagonal groove in this utility model.

[0024] Figure 6 This is a schematic diagram of the main structure of the second heat-conducting plate and the hexagonal groove in this utility model.

[0025] The labels in the diagram represent: 1. Photovoltaic module; 11. Photovoltaic glass; 12. Solar cell; 2. Heat collection module; 21. First heat-conducting plate; 22. Second heat-conducting plate; 23. Working fluid channel; 24. Input pipe; 25. Output pipe; 26. Hexagonal groove; 3. Frame; 4. Circulation pump; 5. Photovoltaic encapsulant film; 6. Thermal backplate; 7. Stainless steel round tube. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Figures 2 to 6This invention illustrates an embodiment of the photovoltaic-thermal integrated device. The photovoltaic-thermal integrated device of this embodiment includes a photovoltaic module 1 and a heat collection module 2. The heat collection module 2 includes a first heat-conducting plate 21, a second heat-conducting plate 22, and a working fluid channel 23. The first heat-conducting plate 21 is connected to one side of the second heat-conducting plate 22, and the other side of the second heat-conducting plate 22 is connected to the photovoltaic module 1. The working fluid channel 23 is located between the first heat-conducting plate 21 and the second heat-conducting plate 22, and the working fluid channel 23 is connected to an input pipe 24 and an output pipe 25.

[0031] This photovoltaic-thermal integrated device uses a heat collection module 2 instead of a traditional backplate. There is a working fluid channel 23 between the first heat-conducting plate 21 and the second heat-conducting plate 22. The working fluid enters from the input pipe 24, carries away heat through the working fluid channel 23, and exits from the output pipe 25. The working fluid is in full contact with the first heat-conducting plate 21 and the second heat-conducting plate 22. Compared with the traditional contact method of the heat-conducting backplate 6 + stainless steel round tube 7, the contact area is greatly increased, and the heat conduction and heat collection effect is better. Moreover, the first heat-conducting plate 21 is easier to install than the stainless steel round tube 7 because it does not have a convex surface. In addition, the second heat-conducting plate 22 conducts heat generated by the photovoltaic module 1, while the first heat-conducting plate 21 can absorb the reflected solar heat energy from the ground and the air heat energy, further improving the heat collection effect.

[0032] Furthermore, in this embodiment, the second heat-conducting plate 22 is provided with a plurality of uniformly arranged hexagonal grooves 26 on the side near the working fluid channel 23. The hexagonal grooves 26 further increase the contact area between the working fluid and the second heat-conducting plate 22, prolong the heat exchange time of the working fluid, and further improve the heat exchange effect.

[0033] Furthermore, in this embodiment, the input pipe 24 and the output pipe 25 are respectively located at opposite corners of the working fluid channel 23, thereby improving the flow effect of the working fluid.

[0034] Furthermore, in this embodiment, both the input pipe 24 and the output pipe 25 are equipped with circulation pumps 4. This ensures the flow of the working fluid and prevents it from stagnating, which would affect the heat collection effect.

[0035] Furthermore, in this embodiment, the first heat-conducting plate 21 and the second heat-conducting plate 22 are welded together. This ensures good sealing.

[0036] Furthermore, in this embodiment, the second heat-conducting plate 22 is a graphene heat-conducting plate, which has good thermal conductivity.

[0037] Furthermore, in this embodiment, the first heat-conducting plate 21 is a stainless steel heat-conducting plate. It offers good stability and is easy to install.

[0038] Furthermore, in this embodiment, the photovoltaic module 1 includes photovoltaic glass 11 and solar cells 12. The photovoltaic glass 11 and solar cells 12, as well as the solar cells 12 and the second heat-conducting plate 22, are bonded together by photovoltaic adhesive film 5. The structure is simple and the connection is convenient.

[0039] Furthermore, in this embodiment, a frame 3 is provided around the photovoltaic glass 11, the solar cell 12, the first heat-conducting plate 21, and the second heat-conducting plate 22. This protects the edges of the photovoltaic glass 11, enhances sealing performance, and improves mechanical strength. Preferably, the frame 3 is an aluminum alloy frame, which offers high strength and good durability.

[0040] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A photovoltaic-thermal integrated device, characterized in that: The device includes a photovoltaic module (1) and a heat collection module (2). The heat collection module (2) includes a first heat-conducting plate (21), a second heat-conducting plate (22), and a working fluid channel (23). The first heat-conducting plate (21) is welded to one side of the second heat-conducting plate (22), and the other side of the second heat-conducting plate (22) is bonded to the photovoltaic module (1). The working fluid channel (23) is located between the first heat-conducting plate (21) and the second heat-conducting plate (22), and the working fluid channel (23) is connected to an input pipe (24) and an output pipe (25).

2. The photovoltaic-thermal integrated device according to claim 1, characterized in that: The second heat-conducting plate (22) has a plurality of uniformly arranged hexagonal grooves (26) on the side near the working fluid channel (23).

3. The photovoltaic-thermal integrated device according to claim 2, characterized in that: The input pipe (24) and output pipe (25) are respectively located at opposite corners of the working fluid channel (23).

4. The photovoltaic-thermal integrated device according to claim 3, characterized in that: Both the input pipe (24) and the output pipe (25) are equipped with circulation pumps (4).

5. The photovoltaic-thermal integrated device according to claim 1, characterized in that: The first heat-conducting plate (21) and the second heat-conducting plate (22) are welded together.

6. The photovoltaic-thermal integrated device according to any one of claims 1 to 5, characterized in that: The second heat-conducting plate (22) is a graphene heat-conducting plate.

7. The photovoltaic-thermal integrated device according to any one of claims 1 to 5, characterized in that: The first heat-conducting plate (21) is a stainless steel heat-conducting plate.

8. The photovoltaic-thermal integrated device according to any one of claims 1 to 5, characterized in that: The photovoltaic module (1) includes photovoltaic glass (11) and solar cells (12). The photovoltaic glass (11) and solar cells (12) are bonded together by photovoltaic adhesive film (5), and the solar cells (12) and the second heat-conducting plate (22) are bonded together by photovoltaic adhesive film (5).

9. The photovoltaic-thermal integrated device according to claim 8, characterized in that: The photovoltaic glass (11), the battery cell (12), the first heat-conducting plate (21), and the second heat-conducting plate (22) are provided with a frame (3) around their outer periphery.

10. The photovoltaic-thermal integrated device according to claim 9, characterized in that: The frame (3) is an aluminum alloy frame.

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