Thermal Effects of Vertical Greening in Summer: An Investigation on Evapotranspiration and Shading of Façade Greening in Vienna

Global urbanization is advancing, and with it, the densification of cities. Due to increased sealing open spaces re-densification existing urban settings, green in city are becoming scarcer. At same time, greening within fabric known for its positive effects on environment decisively counteracts heat effect. This study deals benefits façades as a cooling measure. Two façade systems, one trough cassette system, consisting curtain wall elements basic metal structure, installed at south-facing outdoor school building Vienna, Austria, were taken under metrological examination. In order evaluate effect caused by evapotranspiration, amount water evaporated was calculated using difference inflow outflow. Furthermore, surface temperatures greened non-greened walls measured display influence interaction shading evapotranspiration surrounding microclimate. The investigated vertical system an area 58 m2 has average evaporation capacity 101.38 L per day summer. maximum temperature be 11.6 °C.