底部阻塞对太阳能光伏板风荷载的影响研究

太阳能光伏板在使用的过程中由于地面起伏、植被生长、雪沙迁移等造成底部流体阻塞,影响气流流动及其表面风荷载。采用刚性模型测压风洞试验研究了底部阻塞率对太阳能光伏板表面风荷载的影响。通过对比分析不同阻塞率下太阳能光伏板表面风压分布、整体体型系数和风致弯矩系数,总结了阻塞率对光伏板风荷载的影响规律,分析了阻塞对风荷载的影响机理。结果表明:底部阻塞会明显增大光伏板上的最强风吸力,会减弱光伏板上的最强风压力及风致弯矩。研究成果可以为目前尚不完备的光伏板风荷载取值提供依据。

Study on effect of bottom flow obstruction on wind load of solar photovoltaic panels

The space on bottom of solar photovoltaic panel is possibly to be blocked due to wavy terrain,plants,moving snow or sands and others during its service period,which affects the flow of wind and its surface wind load. The rigid model pressure wind tunnel test was used to study the effect of bottom flow obstructuion ratio on the wind load on the surface of solar photovoltaic panels. By comparing and analyzing the wind pressure distribution,overall body shape coefficient and wind-induced bending moment coefficient of solar photovoltaic panels under various bottom flow obstruction ratio,the influence law of bottom flow obstruction ratio on wind load of photovoltaic panels was summarized,and the influence mechanism of obstruct on wind loads was analyzed. The results show that the bottom flow obstruction will significantly increase the strongest wind suction on the photovoltaic panel,which will reduce the strongest wind pressure and wind induced bending moment on the photovoltaic panel. The research results can provide a basis for the current incomplete photovoltaic panel wind load values.