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首页> 外文期刊>KSCE journal of civil engineering >Numerical Investigation of Wind Pressure Coefficients for Photovoltaic Arrays Mounted on Building Roofs
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Numerical Investigation of Wind Pressure Coefficients for Photovoltaic Arrays Mounted on Building Roofs

机译：安装在建筑物屋顶上的光伏阵列风压系数的数值研究

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The wind pressure distribution on the photovoltaic (PV) array is of great importance to the wind resistance design. The flow field related to the pressure can be influenced significantly by the turbulence induced by the building roof edge (Kopp et al., 2012) and it is essential to consider the building effect during the investigation. However, most CFD (computational fluid dynamics) investigations of wind pressure distribution on the PV array are limited to ground mounted PV array without the building. There is a necessity to extend the application of CFD method to flows around roof-mounted PV array. This study investigated the wind pressure distributions on PV arrays mounted on building roofs by means of Reynolds-averaged Navier-Stokes (RANS) approach using the FLUENT software. Since RANS models are sensitive to the fiow condition, several RANS models are adopted and the most accurate RANS model for predicting this type of flow is identified based on a comparison with the wind tunnel experimental results. The SST Kappa-omega model can predict the highest net mean wind uplift located at panels upstream accurately and is further applied for the parameter analysis to facilitate the installation of roof-mounted PV array. Numerical simulations of the wind flow field for wind angles between 0 degrees to 180 degrees were carried out at intervals of 20 degrees, and the resulted net pressure distributions were presented. The influences of tilt angles of the PV array were investigated and the pressure distributions of PV panels were related to the flow field. Moreover, the effects of clearance between the PV array and building roof on the flow fields and pressure distributions of the PV array related to PV array tilt angle are studied.
机译：光伏（PV）阵列上的风压分布非常重视防风设计。与压力有关的流场可以通过建筑屋顶边缘引起的湍流来显着影响（Kopp等，2012），并且在调查期间考虑建筑效果至关重要。然而，大多数CFD（计算流体动力学）对PV阵列上的风力压力分布的调查限于没有建筑物的地面安装的PV阵列。必须延长CFD方法的应用围绕屋顶安装的PV阵列流动。本研究通过使用流畅的软件，调查了安装在建筑物屋顶上的PV阵列上的风压分布。使用流畅的软件，revier-passpier-stokes（rans）方法。由于RANS模型对FIOW条件敏感，因此采用了几种RAN模型，并且基于与风洞实验结果的比较，确定了用于预测这种类型的最精确的RAN模型。 SST kappa-Omega模型可以预测最高净平均风隆起，可准确地位于上游的面板上，进一步应用于参数分析，以便于安装屋顶安装的PV阵列。在0度至180度之间的风速场的风流场的数值模拟以20度的间隔进行，并呈现所得到的净压力分布。研究了PV阵列的倾斜角度的影响，并且PV面板的压力分布与流场有关。此外，研究了PV阵列和建筑物屋顶之间的间隙对与PV阵列倾斜角度相关的流场和压力分布之间的间隙。

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