EFFECT OF PLANTS LAYOUT MODE ON PASSIVE COOLING OF PHOTOVOLTAIC MODULE AND ROOF, AND WATER EVAPORATION

Zhang Kaike; Ran Maoyu

doi:10.19912/j.0254-0096.tynxb.2021-0145

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (10) : 88-93. DOI: 10.19912/j.0254-0096.tynxb.2021-0145

EFFECT OF PLANTS LAYOUT MODE ON PASSIVE COOLING OF PHOTOVOLTAIC MODULE AND ROOF, AND WATER EVAPORATION

Zhang Kaike^1,2, Ran Maoyu^1,2

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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.

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Zhang Kaike, Ran Maoyu. EFFECT OF PLANTS LAYOUT MODE ON PASSIVE COOLING OF PHOTOVOLTAIC MODULE AND ROOF, AND WATER EVAPORATION[J]. Acta Energiae Solaris Sinica. 2022, 43(10): 88-93 https://doi.org/10.19912/j.0254-0096.tynxb.2021-0145

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