摘要
光伏屋顶带通风腔可以加强组件与空气的对流换热,改善屋顶热工性能并提升光伏转换效率。本文通过红外热像实地测试沪上生态家坡屋顶的光伏组件背板温度,并与数值模拟相结合,在验证数值理论分析的可靠性后同时对通风腔高度降低组件背板温度的作用规律进行进一步分析。研究结果表明,通风腔增高的确会降低背板温度,但稳定的降温作用并不明显。在风行进方向上刚刚进入通风腔时存在一个"S"段,位于此段内组件被降温作用尤其明显,在光伏布置组件时可以利用间距变化营造"S"段效应加强背板换热。
Photovoltaic on roof with ventilated cavity can strengthen the convective heat dissipation and improve the photovoltaic conversion efficiency. This paper carried out an infrared thermal experiment combined with numerical simulation. The numerical simulation is about the effect of ventilated cavity on the backplane temperature. It concludes that there is an ＂S＂ section when the wind into the beginning of the ventilated cavity. The cooling effect is particularly obvious in this section and should be used to enhance the heat dissipation.
出处
《建筑热能通风空调》
2016年第10期21-25,共5页
Building Energy & Environment
基金
十二五"国家科技支撑计划课题(2014BAJ01B02)
关键词
光伏板
通风腔
散热
integrated photovoltaic
ventilated cavity
heat dissipation
