A close-coupled flow channel for a PVT device

Abstract

The utility model belongs to photovoltaic and photo-thermal integration (PVT) device technical field, concretely relates to a PVT device's close -packed flow channel, including heat absorption plate, flow channel, press band, the flow channel is fixed with flow channel on heat absorption plate, and flow channel is divided into main flow channel and branch flow channel, branch flow channel is arranged along heat absorption plate length direction, and both ends of branch flow channel are formed into Z type shape, and Z type shape tail end is connected on main flow channel, and total import and total export are formed on main flow channel, and the avoiding mouth is set up on heat absorption plate, and branch flow channel is bent around the avoiding mouth at the avoiding mouth, and the both sides of press band are fin, and the middle is arc accommodating cavity, and arc accommodating cavity contains branch flow channel, and both sides fin are fixed on heat absorption plate, the utility model has reached the purpose of improving PVT device heat transfer efficiency, solving assembly interference problem.

Description

Technical Field

[0001] This utility model belongs to the technical field of photovoltaic-thermal integrated (PVT) devices, specifically relating to a densely packed flow channel for a PVT device. Background Technology

[0002] Existing PVT devices mainly consist of photovoltaic modules, heat exchanger cores, insulation layers, frames, and backsheets. Currently, they mainly face the following technical challenges: 1. In order to improve the heat transfer capacity of photovoltaic modules and heat exchanger core, the two need to be tightly bonded together. However, the junction box on the back of the photovoltaic module will interfere with the assembly space of the integrated heat exchanger core, resulting in loose bonding and reduced heat transfer efficiency. 2. Most existing PVT full-channel systems adopt a structure of "two photovoltaic panels connected as one". When the medium flow channel is connected, this structure is prone to increasing the fluid pressure difference inside the flow channel, reducing the circulation speed, and causing ineffective losses in the energy transmission process. 3. Traditional flow channels have a long contact distance with photovoltaic modules and a small number of flow channels, resulting in poor heat absorption and conduction effects. Summary of the Invention

[0003] This invention provides a densely packed flow channel for a PVT device, aiming to improve the heat transfer efficiency of the PVT device and solve the problem of assembly interference.

[0004] A densely packed flow channel for a PVT device, characterized in that it includes a heat absorption plate, flow channels, and pressure belts; The heat absorber plate is fixed with flow channels, which are divided into main flow channels and branch flow channels. The branch flow channels are arranged along the length of the heat absorber plate, and the two ends of the branch flow channels are respectively formed into Z-shapes, with the tail ends of the Z-shapes connected to the main flow channels. A total inlet and a total outlet are formed on the main flow channels. The heat-absorbing plate is provided with an avoidance opening, at which the branch channel bends around the avoidance opening; in the pressure strip, there are fins on both sides and an arc-shaped receiving cavity in the middle; the arc-shaped receiving cavity accommodates the branch channel, and the fins on both sides are fixed to the heat-absorbing plate.

[0005] Furthermore, the compression strip is an aluminum strip.

[0006] Furthermore, the pressure band is installed at the straight section of the branch channel.

[0007] Furthermore, the PVT device is provided with one pair of inlets and outlets or two pairs of inlets and outlets in its densely packed flow channels.

[0008] Furthermore, adhesive strips are fixed around the perimeter of the heat-absorbing plate.

[0009] The beneficial effects of this utility model are: 1. In the heat-absorbing plate structure of this utility model, an avoidance opening is provided, and a junction box is installed on the back of the photovoltaic panel. The junction box extends out from the avoidance opening, allowing the heat-absorbing plate to adhere to the back of the photovoltaic panel, fully absorbing and conducting heat, and transferring heat to the fluid medium. The branch channel is designed as a bend at the avoidance opening, and the junction box is avoided through the local flexible deformation of the branch channel, achieving interference-free assembly; it does not affect the overall fit of the channel. 2. In this utility model, the flow channel is arranged along the length direction and is relatively long, so that the medium fluid can fully exchange heat and improve the heat exchange efficiency.

[0010] 3. The end of the branch channel is designed in a Z-shape and then connected to the main channel, allowing the main body of the branch channel to adhere to the heat-absorbing plate. Because the diameter of the main channel is larger than that of the branch channel, if the branch channel is directly connected to the main channel, it will be tilted relative to the heat-conducting plate and will not adhere, reducing the heat conduction efficiency. However, in this invention, the end of the branch channel is Z-shaped, which overcomes the height difference between the branch channel and the main channel during installation, allowing the branch channel to adhere to the heat-conducting plate and ensuring heat conduction efficiency.

[0011] 4. The branch channels are pressed onto the heat-conducting plate by a pressure belt. The pressure belt structure also has a heat-conducting function, allowing the branch channels to exchange heat with the heat-conducting plate and the pressure belt. At the same time, the pressure belt also makes the branch channels adhere more closely to the heat-conducting plate.

[0012] 5. One end of each branch channel is connected to the main channel to form a centralized fluid inlet and outlet, ensuring the continuity of fluid flow, effectively reducing fluid pressure difference, increasing circulation speed, and reducing energy waste.

[0013] 6. The rubber strips that fix the perimeter of the heat absorber plate provide shock absorption between the flow channel and the photovoltaic module, preventing direct impact. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention; Figure 2 A schematic diagram of the connection structure between the end of the tributary and the main channel; Figure 3 This is a schematic diagram of the upper and lower inlet and outlet in Embodiment 2 of this utility model; Figure 4 This is a schematic diagram showing the left and right inlets / outlets in Embodiment 2 of this utility model. Figure 5 A schematic diagram of the inlet and outlet at the back of the structure in Embodiment 2 of this utility model; Figure 6 for Figure 5 A schematic diagram of the side structure; In the diagram: 1. Heat absorber plate; 1.1. Clearance opening; 2. Pressure belt; 3. Main channel; 4. Branch channel. Detailed Description

[0015] The technical solution of the present invention is further explained and described below through specific embodiments. Embodiment 1

[0016] Referring to the accompanying drawings, the present utility model provides a densely arranged flow channel for a PVT device, which is characterized by comprising a heat absorbing plate 1, flow channels, and a pressing strip 2; A flow channel is fixed on the heat absorbing plate 1, and the flow channel is divided into a main flow channel 3 and branch flow channels 4; the branch flow channels 4 are arranged along the length direction of the heat absorbing plate, and both ends of each branch flow channel 4 are formed in a Z shape, with the tail end of the Z shape connected to the main flow channel 3; a total inlet and a total outlet are formed on the main flow channel 3; The heat absorbing plate 1 is provided with an avoiding opening 1.1, and at the avoiding opening 1.1, the branch flow channel 4 is bent to bypass the avoiding opening 1.1; the pressing strip 2 is an aluminum strip, with fins on both sides and an arc-shaped accommodating cavity in the middle, and the side surface of the pressing strip 2 is in a "several" shape; the arc-shaped accommodating cavity accommodates the branch flow channel, and the fins on both sides are fixed on the heat absorbing plate 1; the pressing strip 2 is arranged at the straight section of the branch flow channel 4. High-temperature resistant heat-conducting adhesive strips are fixed on the periphery of the heat absorbing plate 1.

[0017] One pair of inlet and outlet is arranged in the main flow channel of the densely arranged flow channel of the PVT device Embodiment 2

[0018] On the basis of the structure of Embodiment 1, in this embodiment, two pairs of inlets and outlets are arranged in the main flow channel 3, which facilitates the series connection and parallel connection of two photovoltaic panels. The inlets and outlets can be arranged at the top and bottom, left and right, or on the back.

Claims

1. A densely packed flow channel for a PVT device, characterized in that, It includes heat absorption plates, flow channels, and pressure belts; The heat absorber plate is fixed with flow channels, which are divided into main flow channels and branch flow channels. The branch flow channels are arranged along the length of the heat absorber plate, and the two ends of the branch flow channels are respectively formed into Z-shapes, with the tail ends of the Z-shapes connected to the main flow channels. A total inlet and a total outlet are formed on the main flow channels. The heat-absorbing plate is provided with an avoidance opening, at which the branch channel bends around the avoidance opening; in the pressure strip, there are fins on both sides and an arc-shaped receiving cavity in the middle; the arc-shaped receiving cavity accommodates the branch channel, and the fins on both sides are fixed to the heat-absorbing plate.

2. The densely packed flow channels of the PVT device according to claim 1, characterized in that, The compression strip is an aluminum strip.

3. The densely packed flow channels of the PVT device according to claim 1, characterized in that, The pressure belt is installed at the straight section of the branch channel.

4. The densely packed flow channels of the PVT device according to claim 1, characterized in that, The PVT device is provided with one pair of inlets and outlets or two pairs of inlets and outlets in its dense flow channel.

5. The densely packed flow channels of the PVT device according to claim 1, characterized in that, The heat-absorbing plate is fixed with adhesive strips around its perimeter.

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