About The effect of lifting photovoltaic bracket
The purpose of this paper is to balance the lift and drag of the solar photovoltaic array system by changing the arrangement of solar photovoltaic panels and to find a photovoltaic array arrangement with better wind resistance based on the numerical results.
The purpose of this paper is to balance the lift and drag of the solar photovoltaic array system by changing the arrangement of solar photovoltaic panels and to find a photovoltaic array arrangement with better wind resistance based on the numerical results.
The drag and lift coefficients gradually decreased in subsequent rows because of the sheltering effect. When the wind flowed from the side, the leftmost and rightmost columns provided a sheltering effect, which reduced the drag and lift coefficients for the center of the solar panel array by 45%–86%.
The drag and lift coefficients of the solar panel array gradually decreased along the wind direction because of the sheltering effect of the first row of solar panels. Furthermore, the drag and lift forces on the solar panels increased with the turbulent kinetic energy, especially for the first row of solar panels.
This paper aims to analyze the wind flow in a photovoltaic system installed on a flat roof and verify the structural behavior of the photovoltaic panels mounting brackets. The study is performed by computational simulations using Computational Fluid Dynamics resources and equations of solid mechanics and structural analysis.
The drag coefficient, lift coefficient and overturning moment coefficient of the photovoltaic modules increase when the inclination angle becomes larger. These coefficients rapidly change when the inclination angle is less than 20°, and then turn to be constant after the inclination angle is above 20°.
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6 FAQs about [The effect of lifting photovoltaic bracket]
How does a photovoltaic panel arrangement affect the lift?
Compared with resistance, the lift is more sensitive to photovoltaic panel arrangement, and the primary influence is the lift direction (Photovoltaic panel installation direction). The drag and lift of the mutually parallel panels all show the same trend of gradual increase or decrease with increasing the pitch angel of the platform.
Why do solar panels have a lower drag and lift coefficient?
The drag and lift coefficients of the solar panel array gradually decreased along the wind direction because of the sheltering effect of the first row of solar panels. Furthermore, the drag and lift forces on the solar panels increased with the turbulent kinetic energy, especially for the first row of solar panels.
How does wind load affect photovoltaic panels?
The wind load on the photovoltaic panel array is sensitive to wind speed, wind direction, turbulence intensity, and the parameters of the solar photovoltaic panel structure. Many researchers have carried out experimental and numerical simulation analyses on the wind load of photovoltaic panel arrays. Table 1.
Does wind angle affect the drag and lift forces on solar panels?
Furthermore, the drag and lift forces on the solar panels increased with the turbulent kinetic energy, especially for the first row of solar panels. The effect of the wind angle of attack was also analyzed, and the in-line wind direction cases (0° and 180°) showed higher drag and lift coefficients than the other cases.
Do solar panels have higher lift coefficients compared to other solar panels?
Similar to drag coefficients results, the last row of solar panels showed relatively higher area-averaged lift coefficients compared to middle row of solar panels. However, the first row of solar panels showed relatively lower area-averaged lift coefficients compared to middle row of solar panels owing to the wind direction.
Why do solar panels have a negative lift coefficient?
Because the lift coefficients were negative when the wind flowed from the front side (0°–90°, 270°–360°), the sheltering effect of the first row of solar panels caused enhanced minimum lift coefficients for the second to last rows. Fig. 9. (a) Maximum drag coefficients, (b) maximum lift coefficients, and (c) minimum lift coefficients.
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