Photovoltaic panel cooling system based on air guide of guide plate

Abstract

The invention discloses a photovoltaic panel cooling system based on air guide of a flow guide plate, and relates to the technical field of heat dissipation of photovoltaic equipment. The system comprises a photovoltaic panel body, an inclined flow guide plate, a flow guide back plate, a bracket I and a bracket II, the photovoltaic panel body is obliquely arranged, and a plurality of uniformly distributed oblique guide plates are adhered to the back of the photovoltaic panel body through heat-conducting silicone grease; the flow guide back plate is arranged in parallel at a preset distance from the back of the photovoltaic panel body, is consistent with the photovoltaic panel body in length, and is used for guiding large-range airflow to flow to the back side of the photovoltaic panel; through the cooperative wind guide effect of the inclined flow guide plate and the flow guide back plate, heat convection between the photovoltaic panel and air is enhanced, so that the temperature distribution of the photovoltaic panel is uniform, the working temperature is effectively reduced, and the photoelectric conversion efficiency is improved; and meanwhile, the structure is simple, the cost is low, extra power is not needed, various photovoltaic power station scenes are adapted, and good practicability and economical efficiency are achieved.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic equipment heat dissipation technology, and in particular to a photovoltaic panel cooling system based on airflow guided by a guide plate. Background Technology

[0002] As the global energy structure shifts towards renewable energy, photovoltaic (PV) power generation has been widely adopted worldwide due to its advantages of being pollution-free and renewable. PV panels convert solar radiation into electricity through the photovoltaic effect; however, the photoelectric conversion efficiency of existing PV panels is limited. A typical monocrystalline silicon solar cell has a conversion efficiency of only 14%-17%, meaning that almost all the solar radiation not converted into electricity is converted into heat, leading to increased operating temperatures of the PV panels.

[0003] The photoelectric conversion efficiency of photovoltaic (PV) panels exhibits a significant negative correlation with operating temperature. When the operating temperature exceeds 25°C, the conversion efficiency decreases by an average of 0.4%-0.65% for every 1°C increase in temperature. Furthermore, prolonged exposure to high temperatures accelerates the aging of PV panel materials, shortens their lifespan, and severely impacts the overall performance and stability of the PV system. Therefore, reducing the operating temperature of PV panels is a crucial means to improve PV power generation efficiency and extend equipment lifespan.

[0004] Currently, research on photovoltaic panel cooling, both domestically and internationally, mainly focuses on methods such as optimizing natural ventilation channels, adding fins, and evaporative cooling. Among these, natural ventilation cooling has become the mainstream technology due to its simple structure and lack of additional energy consumption. However, existing natural ventilation cooling technologies suffer from drawbacks such as poor airflow guidance, uneven heat exchange, and prominent local overheating problems. Furthermore, there is relatively little research on optimizing the channel flow field and enhancing heat exchange through guide plate structure optimization, making it difficult to meet the actual needs of photovoltaic power plants for efficient heat dissipation.

[0005] Based on this, the present invention proposes a photovoltaic panel cooling system with reasonable structure, significant cooling effect and strong adaptability. By optimizing the airflow guiding structure to guide the airflow and enhance convective heat transfer, the technical problem of photovoltaic guide plate heat generation restricting performance is solved. Summary of the Invention

[0006] To address the problems of poor cooling effect, uneven heat exchange, and complex structure of existing photovoltaic panels, this invention provides a photovoltaic panel cooling system based on a guide plate. Through the coordinated design of the heat-conducting inclined guide plate and the guide back plate, the airflow is guided to flow evenly across the surface and back of the photovoltaic panel, enhancing convective heat exchange, reducing the operating temperature of the photovoltaic panel, and improving the photoelectric conversion efficiency and equipment lifespan.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A photovoltaic panel cooling system based on airflow guide plate includes a photovoltaic panel body, an inclined airflow guide plate, an airflow guide back plate, a support frame one, and a support frame two;

[0009] The photovoltaic panel body is fixed at an angle by a mounting bracket, with an angle of 30°-35° to the horizontal ground, and the minimum distance between the photovoltaic panel body and the ground is not less than 412mm;

[0010] The inclined guide plate is attached to the back of the photovoltaic panel body and is evenly distributed along the length of the photovoltaic panel body. The inclined guide plate is set at a preset angle to the back of the photovoltaic panel body to disturb the airflow and conduct the heat generated by the photovoltaic panel body.

[0011] The airflow guide backplate is arranged parallel to the back of the photovoltaic panel body via a bracket two. The length of the airflow guide backplate is the same as the length of the photovoltaic panel body, and the width is adapted to the width of the photovoltaic panel body. The airflow guide backplate and the photovoltaic panel body maintain a preset parallel distance to guide the surrounding airflow to the back side of the photovoltaic panel body.

[0012] Furthermore, the area where the photovoltaic panel body, the inclined guide plate, and the guide back plate are located forms a closed airflow area that allows for sufficient airflow. The height of the airflow area is 2000-3000mm, the width is 1000-1300mm, and the horizontal length is 3000-4000mm, ensuring that the airflow develops fully in the horizontal direction.

[0013] Furthermore, the photovoltaic panel body adopts standard specification components with dimensions of 1480-1485mm in length, 670-680mm in width, and 30-40mm in thickness.

[0014] Furthermore, the length of the inclined guide plate is 80-120mm and the thickness is 4-6mm.

[0015] Furthermore, the inclined guide plate is made of aluminum, and there are 4-6 pieces. The adhesive medium is thermally conductive silicone grease.

[0016] Furthermore, the angle between the inclined guide plate and the back of the photovoltaic panel body is 30°-45°, and the spacing between two adjacent inclined guide plates is equal to ensure uniform airflow disturbance.

[0017] Furthermore, the parallel distance between the flow guide backplate and the photovoltaic panel body is 200-300mm, the thickness of the flow guide backplate is 5-8mm, and it is made of metal or high-strength flame-retardant plastic material.

[0018] Furthermore, the flow medium in the air circulation area is air, and the airflow is driven by natural wind speed to flow over the surface and back of the photovoltaic panel body, and heat is removed through convection heat exchange, without the need for an additional power device.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. Significant cooling effect: Through the synergistic effect of the inclined guide plate and the guide back plate, the airflow guidance and convection heat transfer are enhanced, which can reduce the maximum wall temperature of the photovoltaic panel by more than 4°C, with uniform temperature distribution, effectively avoiding hot spot effect, and improving photoelectric conversion efficiency. For every 1°C reduction in temperature, the conversion efficiency can be increased by 0.3%-0.5%.

[0021] 2. Simple structure and low cost: No additional power unit is required. Cooling is achieved by natural ventilation. The inclined guide plate and guide back plate have simple structure, common materials, low manufacturing cost, and are easy to mass-produce and install. They are suitable for existing photovoltaic power station renovation and new construction projects.

[0022] 3. Multiple protection functions: The inclined guide plate not only enhances heat dissipation, but also reduces dust deposition on the photovoltaic panel surface through airflow disturbance, keeping the photovoltaic panel clean; at the same time, the uniform temperature distribution can reduce thermal stress, delay module aging, and extend the service life of the photovoltaic panel.

[0023] 4. High adaptability: The number, angle and spacing of the inclined guide plates can be optimized according to the wind speed resources and photovoltaic panel specifications in different regions, adapting to various outdoor photovoltaic scenarios and ensuring the efficient operation of photovoltaic power stations. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0026] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0027] Figure 3 This is a side view of the present invention;

[0028] Figure 4 This is a schematic diagram of another embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the air domain of the model of the present invention;

[0030] Figure 6 Diagram showing the entry and exit boundary conditions;

[0031] Figure 7 This is a diagram showing the streamline trajectory of the air around the main body of the photovoltaic panel when there is an inclined guide plate.

[0032] Figure 8 A magnified view of the streamline trajectory of a portion of the main body of the photovoltaic panel;

[0033] Figure 9 This is a diagram showing the temperature distribution on the wall of the inclined guide vane;

[0034] Figure 10 The image shows the surface temperature contour of the photovoltaic panel without the inclined guide plate (v=3m / s, T=20℃).

[0035] Figure 11 The photovoltaic panel wall temperature contour map is shown when there is an inclined guide plate (v=3m / s, T=20℃).

[0036] Figure 12 The average wall temperature is a line graph without the inclined guide vane (v=3m / s, T=20℃).

[0037] Figure 13 The average wall temperature is a line graph with inclined guide vanes (v=3m / s, T=20℃).

[0038] Figure 14 The maximum wall temperature is shown as a line graph with inclined guide vanes (v=3m / s, T=20℃).

[0039] Figure 15 The maximum wall temperature without the inclined guide vane is shown as a line graph (v=3m / s, T=20℃).

[0040] Figure 16 The wall temperature contour map is shown when v=3m / s (T=20℃).

[0041] Figure 17 The wall temperature contour map is shown when v=6m / s (T=20℃).

[0042] Figure 18 The cross-sectional temperature contour map is shown when v=3m / s (T=20℃).

[0043] Figure 19 The cross-sectional temperature contour map is shown when v=6m / s (T=20℃).

[0044] Figure 20 The cross-sectional temperature contour map is shown when v=3m / s (T=20℃).

[0045] Figure 21 This is a cross-sectional temperature contour plot (T=20℃) when v=6m / s. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0047] In the description of the embodiments of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. These are merely for the convenience of describing the invention 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 the invention. Furthermore, the use of terms such as "horizontal," "vertical," and "suspended" does not mean that the component is required to be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0048] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0049] A photovoltaic panel cooling system based on airflow guide plate includes a photovoltaic panel body 100, an inclined airflow guide plate 101, an airflow guide back plate 200, a support frame 102, a support frame 201, and an airflow area.

[0050] The photovoltaic panel body 100 adopts a standard photovoltaic module with a preferred size of 1482mm in length, 676mm in width, and 35mm in thickness. It is fixed at an angle by mounting bracket 102 with the tilt angle set at 33° relative to the horizontal ground. This tilt angle can adapt to the solar radiation angle in most regions and at the same time provide space for airflow on the back. Mounting bracket 102 ensures that the photovoltaic panel body is at least 412mm away from the ground to avoid ground obstacles affecting airflow.

[0051] The inclined guide plate 101 is the core heat-conducting and air-guiding component, which is attached to the back of the photovoltaic panel body. The adhesive medium is thermally conductive silicone grease to ensure efficient heat conduction. The inclined guide plate 101 is made of aluminum with excellent thermal conductivity and has both airflow disturbance and heat dissipation functions. Five plates are set in total and are evenly fixed along the length of the photovoltaic panel body 100. Each heat-conducting inclined guide plate is 100mm long and 5mm thick, and is set at a 33° angle to the back of the photovoltaic panel body. It can guide the air to flow efficiently across the surface of the photovoltaic panel and quickly transfer the heat generated by the photovoltaic panel to the airflow through its own thermal conductivity, thus accelerating heat exchange.

[0052] The airflow guide backplate 200 is used to guide a large range of airflow to the back of the photovoltaic panel. It is set parallel to the back of the photovoltaic panel body 100 via bracket 201, maintaining a parallel distance of 250mm between it and the photovoltaic panel body 100. The length of the airflow guide backplate 200 is the same as the length of the photovoltaic panel body (1482mm), and the width is adapted to the width of the photovoltaic panel body. It is made of aluminum alloy and has both structural strength and heat conduction auxiliary function. It can guide a large range of surrounding air to the back of the photovoltaic panel, improving the overall heat exchange efficiency.

[0053] The air circulation area provides space for airflow and heat exchange, enclosing the photovoltaic panel body, the inclined guide plate 101, and the guide back plate. It is designed as a cuboid structure with a height of 2500mm, a width of 1170mm, and a horizontal length of 3500mm. This size design ensures that the airflow can fully develop and flow in the horizontal direction, avoiding airflow congestion that would reduce the heat exchange effect. The flow medium is air, driven by natural wind speed, without the need for an additional power device.

[0054] Working principle

[0055] This invention is based on the boundary layer theory of fluid mechanics and the law of conservation of momentum, and achieves photovoltaic panel cooling through the synergistic effect of the inclined guide plate 101 and the guide back plate:

[0056] 1. Airflow guidance: When natural airflow flows through the system, the guide plate first guides a large area of ​​airflow to the back of the photovoltaic panel, changing the direction of airflow and concentrating the airflow towards the photovoltaic panel area; at the same time, the inclined guide plate 101 on the back of the photovoltaic panel disturbs the airflow, breaks the airflow boundary layer, and allows the airflow to more fully cover the back and surface of the photovoltaic panel, increasing the contact area between the airflow and the photovoltaic panel.

[0057] 2. Heat transfer: Part of the heat generated by the photovoltaic panel is quickly conducted to the surface through the inclined guide plate, and the other part is directly dissipated into the surrounding airflow; the disturbed airflow comes into full contact with the surface of the photovoltaic panel and the surface of the inclined guide plate, and carries away the heat through convection heat transfer, thereby cooling the photovoltaic panel.

[0058] 3. Temperature uniformity: The uniform distribution of the inclined guide plate and the effect of airflow disturbance can avoid local heat accumulation in the photovoltaic panel, so that the surface temperature of the photovoltaic panel is uniform, reducing the generation of thermal stress and hot spot effect, and further protecting the photovoltaic panel module.

[0059] In addition, increased wind speed enhances convective heat transfer, making it easier for heat to be carried away. The cooling effect of the system exhibits phased characteristics under different wind speeds. The layout of the airflow structure can be optimized according to the wind speed resources in different regions to improve cooling adaptability.

[0060] Example 1: System Structure Construction

[0061] This embodiment constructs a photovoltaic panel cooling system based on airflow guided by a baffle plate, the specific structure of which is as follows:

[0062] Photovoltaic panel body: A monocrystalline silicon photovoltaic panel with a length of 1482mm, a width of 676mm, and a thickness of 35mm is selected. It is fixed at an angle of 33° with respect to the horizontal ground by a mounting bracket, and the minimum height of the bracket from the ground is 412mm.

[0063] Inclined guide plates: 5 aluminum inclined guide plates, each measuring 100mm (length) × 5mm (thickness), are evenly attached to the back of the photovoltaic panel using thermal grease. The spacing between adjacent inclined guide plates is equal, and the angle between the guide plates and the back of the photovoltaic panel is 33°.

[0064] Backplane: Made of aluminum alloy, measuring 1482mm (length) × 676mm (width) × 6mm (thickness), it is mounted parallel to the back of the photovoltaic panel at a distance of 250mm via a bracket. The bracket is made of stainless steel to ensure structural stability.

[0065] Air circulation area: Construct a rectangular air circulation area with dimensions of 3500mm (horizontal length) × 1170mm (width) × 2500mm (height) to enclose all the above components and form a closed flow space.

[0066] Example 2: Simulation Verification and Effect Analysis

[0067] The flow simulation plugin of Solidworks software was used to perform flow heat transfer simulation analysis on the system in this embodiment to verify the cooling effect. The specific parameter settings are as follows:

[0068] (1) Flowing medium: air. The physical properties of air at different temperatures are shown in the table below:

[0069] Table 1 Physical properties of air

[0070]

[0071] (2) Boundary conditions: The flow type is internal flow, considering gravity (direction is the negative y-axis, value is 9.81 m / s²), and solid internal heat conduction is selected; the front of the photovoltaic panel is set as a surface heat source with a heat flux of 300 W / m²; the inlet is a velocity inlet, and the outlet is a pressure outlet (ambient atmospheric pressure). The inlet and outlet boundary conditions are attached. Figure 6 As shown, air flows in at a specific velocity under fully developed flow conditions. The outlet boundary condition is a pressure outlet boundary condition, with the outlet pressure set to ambient atmospheric pressure to simulate a real airflow emission scenario.

[0072] (3) Mesh generation: Set the global mesh level to level 5, enable the advanced refinement channel, and refine the local mesh on the surfaces of the photovoltaic panel, inclined guide plate and guide back plate to ensure simulation accuracy.

[0073] Example 3: Numerical Simulation of Airflow Cooling via Inclined Guide Plates

[0074] (1) Flow field analysis with inclined guide vanes

[0075] Under specific conditions (wind speed 3 m / s, ambient temperature 20℃), the flow field after adding an inclined guide vane was analyzed. Figure 7 This is a diagram showing the streamline trajectory of the air around the photovoltaic panel and its support structure when an inclined guide plate is present. Figure 8 A magnified view of the streamline trajectory of a portion of the main body of the photovoltaic panel;

[0076] As shown in the comparison diagrams, with the inclined guide vane present, the streamlines near the object are more complexly distributed, exhibiting more entanglement and vortex structures. The color changes indicate significant differences in velocity distribution, suggesting that the inclined guide vane obstructs and guides the fluid, causing noticeable changes in local velocity and creating different velocity regions. The inclined guide vane alters the airflow direction. Above the photovoltaic panel, the airflow velocity distribution shows a significant change. Figure 7 , Figure 8 The displayed flow traces and velocity distribution indicate that the fluid flow around this structure is highly complex. The tortuous and entangled traces, as well as the velocity differences represented by colors, indicate the presence of significant velocity gradients. There are high-speed regions (reddish) and low-speed regions (blued), and eddies may also be present, meaning that the fluid's motion varies at different locations. Figure 9 The temperature distribution on the inclined guide plate wall shows a significant temperature gradient. The inclined plate has heat conduction capabilities, effectively removing heat generated by the photovoltaic panel. Different colors represent different temperatures, indicating that heat is not uniformly distributed on the inclined plate. The presence of high-temperature regions (red) and low-temperature regions (blue) reflects the varying heat transfer conditions at different locations on the inclined plate.

[0077] (2) Temperature comparison of photovoltaic panels with and without inclined guide plates

[0078] Under conditions of wind speed of 3 m / s and ambient temperature of 20℃, the surface temperature of photovoltaic panels in models with and without inclined guide vanes was compared. Figure 10 , Figure 11 The images show the surface temperature cloud maps of the photovoltaic panel under two different models. The comparison reveals that the inclined guide vane improves airflow, enhances heat dissipation, and results in a more uniform surface temperature of the photovoltaic panel. This helps maintain the panel at a suitable operating temperature, improving power generation performance and stability. Without the inclined guide vane, the temperature distribution is uneven, with multiple high-temperature areas (red-orange) and relatively large areas. This indicates that without the inclined guide vane, heat dissipation on the photovoltaic panel surface is poor, leading to heat accumulation and the formation of localized high-temperature points. This affects the power generation efficiency of the photovoltaic panel and may accelerate its aging in the long term.

[0079] From the appendix Figure 12-13 It can be seen that the average wall temperature rises rapidly in the initial stage, reaches a peak, and then gradually decreases, eventually stabilizing as the number of iterations increases. This indicates that without the inclined guide vane, the initial heat exchange between the wall and the fluid is intense, causing the temperature to rise rapidly. As the system operates, heat transfer gradually reaches equilibrium, and the temperature stabilizes. The average wall temperature also rises first, then falls, and then stabilizes, but the rise is accompanied by fluctuations. The inclined guide vane alters the fluid flow state, making the heat exchange process more complex. The fluctuations indicate that the heat exchange between the fluid and the wall is uneven under the influence of the inclined guide vane; however, a relatively stable temperature state is eventually reached, and compared to the system without the inclined guide vane, the temperature change process may be more conducive to controlling the wall temperature.

[0080] And attached Figure 14-15 It can be seen that the maximum wall temperature initially rises sharply to a high value, then gradually decreases and stabilizes. Without the inclined guide vane, local heat accumulation causes a rapid temperature increase, followed by gradual heat dissipation, leading to a temperature decrease and stabilization. The maximum wall temperature also initially rises, then falls and stabilizes, with fluctuations during the rise phase. The inclined guide vane, by altering the flow field, disrupts the heat accumulation pattern, making the rise of the maximum temperature less stable. These fluctuations indicate that the inclined guide vane plays a role in heat homogenization, preventing excessively high local temperatures. The final stable maximum temperature may be lower than that without the inclined guide vane, thus playing a positive role in preventing localized overheating of the wall.

[0081] (3) Comparison of photovoltaic panel temperature under different wind speeds

[0082] A comparison was made of photovoltaic panels at wind speeds of 3 m / s and 6 m / s under ambient temperature of 20℃ and with the addition of inclined guide vanes. Under the same ambient temperature and with the addition of inclined guide vanes, changes in wind speed have a significant impact on the thermal performance of photovoltaic panels. Increasing wind speed helps optimize the temperature distribution of the photovoltaic panels, improves heat dissipation efficiency, and is of positive significance for the efficient and stable operation of photovoltaic panels.

[0083] From the perspective of wall temperature distribution (see...) Figure 16Wall temperature contour map at a velocity of 3 m / s and Figure 17 The image shows the wall temperature contour plot at a wind speed of 6 m / s. When the wind speed is 3 m / s, the photovoltaic panel wall temperature exhibits a certain distribution pattern, with clear distribution patterns between high-temperature and low-temperature regions, reflecting the heat exchange between the fluid and the photovoltaic panel surface. However, when the wind speed increases to 6 m / s, the wall temperature distribution changes, becoming more uniform overall, with some high-temperature areas showing a decrease in temperature. This indicates that increased wind speed enhances convective heat transfer, allowing heat to be carried away more effectively, thus improving the wall temperature distribution.

[0084] Next, observe the cross-sectional diagram of the fluid temperature (see...). Figure 18 Temperature contour plot of the cross section at a velocity of 3 m / s and Figure 19 (Temperature cloud map of the cross section at a wind speed of 6 m / s). At a wind speed of 3 m / s, the fluid temperature change near the photovoltaic panel is relatively gradual, indicating that the heat transfer rate is relatively stable but the efficiency is limited. However, at a wind speed of 6 m / s, the fluid temperature change near the photovoltaic panel is more significant. This means that the high-speed airflow can exchange heat with the photovoltaic panel more quickly, rapidly carrying away the heat from the surface of the photovoltaic panel and thus affecting the overall temperature of the photovoltaic panel.

[0085] Depend on Figure 20 The temperature cloud map shows the temperature distribution across a cross section at this wind speed. Different colors represent different temperatures, revealing a temperature gradient with relatively high and low temperature regions. This indicates uneven heat exchange between the fluid and the wall, with variations in localized heat accumulation and dissipation. Figure 21 Compared to 3 m / s, the temperature distribution is likely to be more uniform at a wind speed of 6 m / s. Generally, increased wind speed enhances convective heat transfer, making it easier for heat to be carried away and reducing local temperature differences.

[0086] The impact of different wind speeds on the temperature of photovoltaic modules exhibits phased characteristics. In the actual design and operation of photovoltaic power plants, local wind speed resources must be fully considered, and auxiliary heat dissipation devices such as inclined guide vanes should be used to optimize the layout and installation of photovoltaic modules in order to achieve efficient heat dissipation and improve the overall performance and stability of the photovoltaic system.

[0087] Results analysis:

[0088] 1. Comparison with and without inclined guide vanes: Under the conditions of wind speed of 3m / s and ambient temperature of 20℃, the maximum wall temperature of the photovoltaic panel without inclined guide vanes is 44℃, with uneven temperature distribution and multiple high-temperature areas; the maximum wall temperature of the photovoltaic panel in the system of this invention (with guide vanes) is reduced to 40℃, with uniform temperature distribution and no obvious local overheating, and the heat dissipation effect is significantly improved.

[0089] 2. Comparison of different wind speeds: Under the condition of ambient temperature of 20℃ and the addition of inclined guide vanes, when the wind speed increases from 3m / s to 6m / s, the temperature of the photovoltaic panel wall further decreases, the temperature distribution becomes more uniform, and the convective heat transfer coefficient between the airflow and the photovoltaic panel is significantly improved. This indicates that increasing the wind speed can enhance the cooling effect, and the system is adaptable to different wind speed environments.

[0090] 3. Flow field analysis: With the inclined guide plate, the airflow streamline is complex but the flow is smooth. The heat-conducting inclined guide plate effectively disturbs the airflow, breaks the boundary layer, and increases the contact area between the airflow and the photovoltaic panel. Without the inclined guide plate, there are a lot of eddies in the airflow, the flow is chaotic, and the heat exchange efficiency is low.

[0091] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A photovoltaic panel cooling system based on airflow guided by a baffle plate, characterized in that: It includes a photovoltaic panel body (100), an inclined guide plate (101), a guide back plate (200), a support bracket one (102) and a support bracket two (201). The photovoltaic panel body (100) is fixed at an angle by the mounting bracket (102) with an angle of 30°-35° to the horizontal ground, and the minimum distance between the photovoltaic panel body (100) and the ground is not less than 412mm; The inclined guide plate (101) is attached to the back of the photovoltaic panel body (100) and is evenly distributed along the length of the photovoltaic panel body (100). The inclined guide plate (101) is set at a preset angle to the back of the photovoltaic panel body (100) to disturb the airflow and conduct the heat generated by the photovoltaic panel body (100). The flow guide backplate (200) is arranged parallel to the back of the photovoltaic panel body (100) via the bracket two (201). The length of the flow guide backplate (200) is the same as the length of the photovoltaic panel body (100), and the width is adapted to the width of the photovoltaic panel body (100). The flow guide backplate (200) and the photovoltaic panel body (100) maintain a preset parallel distance, which is used to guide the surrounding airflow to the back side of the photovoltaic panel body (100).

2. The photovoltaic panel cooling system based on airflow guide plate according to claim 1, characterized in that, The area where the photovoltaic panel body (100), the inclined guide plate (101) and the guide back plate (200) are located forms a closed air circulation area that allows for sufficient airflow. The height of the air circulation area is 2000-3000mm, the width is 1000-1300mm, and the horizontal length is 3000-4000mm, ensuring that the airflow develops fully in the horizontal direction.

3. A photovoltaic panel cooling system based on a guide vane for airflow according to claim 1, characterized in that, The photovoltaic panel body (100) adopts standard specification components with dimensions of 1480-1485mm in length, 670-680mm in width, and 30-40mm in thickness.

4. A photovoltaic panel cooling system based on a guide vane for airflow according to claim 1, characterized in that: The inclined guide plate (101) has a length of 80-120mm and a thickness of 4-6mm.

5. A photovoltaic panel cooling system based on a guide vane for airflow according to claim 4, characterized in that: The inclined guide plate (101) is made of aluminum, and there are 4-6 pieces. The adhesive medium is thermal grease.

6. A photovoltaic panel cooling system based on a guide vane for airflow according to claim 5, characterized in that, The angle between the inclined guide plate (101) and the back of the photovoltaic panel body (100) is 30°-45°, and the spacing between two adjacent inclined guide plates (101) is equal to ensure the uniformity of airflow disturbance.

7. A photovoltaic panel cooling system based on a guide vane for airflow according to claim 1, characterized in that, The parallel distance between the flow guide backplate (200) and the photovoltaic panel body (100) is 200-300mm, the thickness of the flow guide backplate (200) is 5-8mm, and it is made of metal or high-strength flame-retardant plastic material.

8. A photovoltaic panel cooling system based on a guide vane for airflow according to claim 2, characterized in that, The air circulation zone uses air as the flow medium. Natural wind speed drives the airflow to flow over the surface and back of the photovoltaic panel body (100). Heat is transferred through convection heat exchange, without the need for additional power devices.

Images