Numerical study of shielding effect on wind loads of double-slope solar panel arrays

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), Jun.2024, Vol.47 No.6: 829-834, 842

DOI: 10.3969/j.issn.1003-5060.2024.06.017

Authors

WANG Shixiong $ ^{1} $, WANG Shunbo $ ^{1} $, QIU Ye $ ^{2} $

(1. PowerChina Huadong Engineering Co., Ltd., Hangzhou 311122, China; 2. School of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China)

Abstract and Keywords

Abstract: Wind load is one of the main concerns in designing the support structures of solar panels. Currently, there is no unified standard for determining wind loads on double-slope solar panels. In order to study the shielding effect of double-slope solar panel arrays, the Reynolds-averaged Navier-Stokes (RANS) method and the shear stress transfer (SST) $ k-\omega $ turbulence model were employed to investigate the influences of incoming wind direction and inclination angle of the support on the wind loads of solar panels. Based on the analysis of shielding effect, the shape coefficient for the solar panel arrays was suggested, and compared with recommended values specified in the standards of three countries. The results showed that double-slope solar panel arrays exhibit significant shielding effects. The unfavorable wind directions for the shape coefficient of solar panels are $ 0^{\circ} $ and $ 15^{\circ} $, and the maximum wind suction occurs at the leading edge or the corner of leeward solar panel. As the inclination angle of the support increases, the overall shape coefficient and the maximum wind suction increase significantly. The shape coefficient of leeward solar panel is higher than the recommended value for an open double-slope roof given in Chinese code.

Keywords: double-slope solar panel; numerical simulation; shape coefficient; shielding effect; interference factor

作者信息

望世雄 $ ^{1} $，王顺波 $ ^{1} $，邱冶 $ ^{2} $

(1. 中国电建集团华东勘测设计研究院有限公司，浙江杭州 311122；2. 河海大学土木与交通学院，江苏南京 210098)

摘要和关键词

摘要: 风荷载是光伏支架结构设计的控制荷载之一,目前针对双坡光伏板的风荷载取值尚没有统一标准。为揭示双坡光伏阵列的群体遮挡效应,文章采用雷诺时均方法和剪切应力传输模型(shear stress transfer, SST) $ k-\omega $ 湍流模型,研究来流风向角和光伏支架倾角对光伏组件风荷载的影响规律,基于遮挡效应研究给出光伏阵列体型系数的取值建议,并与3个国家规范取值进行对比。结果表明:双坡光伏阵列存在明显的遮挡效应, $ 0^{\circ} $ 和 $ 15^{\circ} $ 为双坡光伏板体型系数的最不利风向,最大风吸力出现在背风光伏板前缘或角部位。随着光伏支架倾角的增加,整体体型系数和极值风吸力显著增大。背风光伏板体型系数取值高于我国规范给出的开敞式双坡屋面规范取值。

关键词: 双坡光伏板；数值模拟；体型系数；遮挡效应；干扰因子

Funding

国家自然科学基金资助项目（51808194）

合肥工业大学学报(自然科学版)

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