绿色光伏屋顶是一种光伏组件遮阳与植被绿化相结合的隔热屋顶,为了揭示植物布置模式对光伏组件和屋面降温的影响,提出了2种植物布置模式并建立了2个混凝土屋顶试验小室。分别对光伏组件背面和屋面上表面温度、植物叶片温度和蒸发量进行测试和对比分析。结果表明：1）相对于植物架空布置模式,植物直接实铺在屋面上可有效降低屋面上表温度平均值和波幅值;2）植物与光伏组件背面距离增加时会减弱其对光伏组件的冷却效果,间距为10 cm时冷却效果较为明显;3）植物与光伏组件背面距离变小时,叶片温度会变高,水分蒸发量变多。因此,植物直接实铺模式有利于绿植光伏屋面节水和节能。
Abstract
Green PV roof is a kind of thermal insulation roof that combines photovoltaic module shading and vegetation greening. In order to reveal the effect of plants layout on the cooling of photovoltaic module and roof, two plants layout modes were proposed and two concrete roof test chambers were built. The temperature of photovoltaic module back and roof upper surface, plant leaf temperature and water evaporation were respectively tested and comparably analyzed. The results show that ：（1） Compared with the overhead layout mode, the average and amplitude of roof surface temperature can be effectively reduced by direct layout mode which lays plants directly on the roof; （2） As the distance between the plants and the back of the photovoltaic module increases, the cooling effect on the photovoltaic module will be weakened. When the distance is about 10 cm, the cooling effect is more obvious. （3） As the distance between plants and the back of the photovoltaic module becomes smaller, the temperature of the plant leaves becomes higher and the water evaporation increases. Therefore, the direct layout mode is beneficial to water saving and energy saving compared with the overhead mode.
关键词
光伏组件 /
绿植光伏屋面 /
植物布置模式 /
被动式降温 /
水分蒸发量
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