为揭示地形坡度对光伏组件风压分布形式及风荷载体型系数的影响,利用FLUENT流体仿真软件,采用雷诺时均方法和剪切应力传输模型湍流模型,开展不同坡度地形下不同光伏组件倾角、不同风向角工况的光伏组件风压分布规律及其风荷载体型系数研究。结果表明：不同坡度地形下风向角和安装倾角均对光伏组件所受风荷载大小具有显著影响;由于地形坡度的存在会导致风产生绕流效应,但随着柱高的增加绕流效应将逐渐减弱;在不同坡度及不同光伏组件安装倾角条件下,单组串光伏组件体型系数均大于光伏阵列组件体型系数;光伏阵列组件的遮挡效应导致第2行光伏组件的体型系数最大衰减达70%,第3行光伏组件的体型系数最大衰减达66%。然而,坡度的存在显著削弱了遮挡效应,最大衰减幅度可减少45%。
Abstract
This study aims to elucidate the influence of terrain slope on wind pressure distribution and wind load shape coefficients of PV modules through computational fluid dynamics （CFD） simulations using FLUENT software. The Reynolds-Averaged Navier-Stokes （RANS） equations coupled with the shear stress transport （SST） turbulence model were employed to investigate the wind pressure distribution patterns and wind load shape coefficients under various configurations, including different PV module inclination angles, wind direction angles, and terrain slopes. The findings reveal that both wind direction angle and mounting inclination angle significantly influence the wind load magnitude on PV modules across different terrain slopes. While terrain features induce wind bypass effects, these effects gradually diminish with increasing column height. Furthermore, under various slope conditions and mounting inclinations, single-string PV modules consistently exhibit higher shape coefficients compared to PV array configurations. The investigation also demonstrates substantial shading effects within PV arrays, resulting in distinctive wind load characteristics for subsequent rows. Specifically, the shape coefficients experience maximum attenuations of 70% and 66% for the second and third rows of PV modules, respectively. However, the presence of terrain slope significantly mitigates these shading effects, reducing the maximum attenuation by up to 45%.
关键词
坡度 /
数值模拟 /
风压 /
光伏组件 /
体型系数 /
遮挡效应
Key words
slope /
numerical simulation /
wind load /
photovoltaic module /
shape coefficient /
shading effect
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