风向角和倾角对光伏阵列风荷载的影响

INFLUENCE OF WIND DIRECTION AND INCLINATION ANGLE ON WIND LOAD OF PHOTOVOLTAIC ARRAYS

该文通过数值模拟方法,系统研究单竖排光伏阵列的风荷载特性以及风向角和倾角的影响。结果表明:光伏阵列在横风作用下,迎风侧光伏组件的风荷载系数最大;光伏组件阻力系数、升力系数以及扭矩系数均随倾角的增大而增大,且在倾角小于20°时变化速率较大,大于20°之后体型系数趋于平缓;光伏阵列中,组件风荷载系数的遮挡效应十分明显,迎风侧光伏组件降低了背风侧组件的来流风速,使得位于下游区域的光伏组件所受风荷载显著减小,且倾角越大遮挡效应越明显。

In this paper,the wind load characteristics of single vertical row photovoltaic arrays and the influence of wind direction and inclination angle are systematically studied using numerical method.The results show that under the crosswind,the wind load coefficient of the photovoltaic modules on the windward side is the largest.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°.The shielding effect is very obvious for the PV arrays.The windward photovoltaic modules reduce the incoming wind speed of the leeward side modules,therefore,the wind load on the photovoltaic module located in the downstream area is obviously lower than those in windward.In addition,the shielding effect is more obvious when the inclination angle is larger.