The Study of Cooling Effects for Thermal Environment by Transpiration of Wall Greening Plants

Abstract

This study aimed to quantitatively evaluate the effects of thermal environment improvement by transpiration of wall-greening. Hedera canariensis, which are commonly used for greening walls, were planted in planters, and their transpiration rates were monitored by weight measurements. As results of experiments, amounts of transipiration value a day is about 0.6mm and the rate of latent heat flux by transpiration to net radiation is about 25%. These results show the latent heat consumption of transpiration at greening system to prevent increase sensible heat and cooling load.