摘要
为评估在不同斜坡地形下光伏阵列所受的风荷载,采用风洞试验和CFD数值模拟研究其表面风压分布规律,及风向角、斜坡坡度和组件倾角对光伏阵列所受风荷载及组件间干扰效应的影响.研究表明:0°风向角下风压分布和平均风压系数最大,为最不利风向;随组件倾角增加,前排组件所受风压力增大,组件间的干扰效应增强,斜坡地形会减弱光伏阵列的遮挡效应;随坡度的增加,后排组件风荷载并未随接触风速的增大(后排组件的海拔高度不断增加)而增加,反而有所减小,当风荷载由风压力变为风吸力后才开始增加.通过CFD数值风洞对大型光伏阵列风荷载仿真发现,光伏阵列中纵向列之间的遮挡效应不明显,且斜坡地形会影响气流平均速度和湍流特性.
To accurately assess the wind loads on photovoltaic(PV)arrays installed on different sloping terrains,wind tunnel tests and CFD numerical simulations were used to study the wind pressure distribution law on the surface of mountainous PV arrays,and the influence of the wind angle,slope and module tilt angle on the wind loads on PV arrays and the interference effect between modules.The results indicate that a wind direction angle of O produces the largest wind pressure distribution and highest mean wind pressure coefficient,representing the most unfavorable wind direction.Increasing the module tilt angle increases the wind pressure on front-row modules,and strengthens the interference effect between modules.Sloping terrain weakens the shading effect among PV arrays.With the increase of the slope,the module wind load does not increase with the increase of the contact wind speed(as the elevation of the rear modules constantly increases).Instead,it initially decreases and only begins to rise when wind loads transition from wind pressure to wind suction.CFD simulation of wind loads on large-scale PV arrays reveal that shading effects between longitudinal columns are not significant.The influence of topography on the mean velocity of the airflow and turbulence characteristics was also investigated.
作者
徐亚洲
杜毅毅
张巍
王昱峻
冯仰敏
XU Yazhou;DU Yiyi;ZHANG Wei;WANG Yujun;FENG Yangmin(College of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;College of Science,Xi’an University of Architecture and Technology,Xi’an 710055,China;Huaneng Guizhou Clean Energy Co.,Ltd.,Guiyang 550081,China;Xi’an Thermal Power Research Institute Co.,Ltd.,Xi’an 710032,China)
出处
《湖南大学学报(自然科学版)》
北大核心
2025年第11期142-153,共12页
Journal of Hunan University:Natural Sciences
基金
国家自然科学基金资助项目(52478209)
华能集团总部科技项目山地光伏电站柔性支架关键技术研究(TM-22-HJK07/H1)
陕西省自然科学基础研究计划(2025JC-YBMS-769)。
关键词
光伏组件
风荷载
风洞试验
风压系数
地形效应
PV module
wind load
wind tunnel test
wind pressure coefficient
terrain effect
