Paper Conference

Proceedings of Building Simulation 2017: 15th Conference of IBPSA


Transpirative Cooling Potential of Vegetation in Urban Environment using Coupled CFD and Leaf Energy Balance Model

Lento Manickathan1,2-∗, Thijs Defraeye1,2, Jonas Allegrini1,2, Dominique Derome2, Jan Carmeliet1,2
1Chair of Building Physics, ETH Zurich, Zurich, Switzerland
2Multiscale Studies in Building Physics, Empa, Du¨bendorf, Switzerland

Abstract: Urban greening strategies are increasingly being employed to provide natural cooling in cities and to mitigate the Urban Heat Island effect (UHI). In this study, we investigate the influence of environmental factors such as wind speed, relative humidity and solar radiation on cooling potential of a tree. Furthermore, we investigate the influence of tree height on the microclimate. A parametric study is performed using a coupled CFD and vegetation model, where the tree is modeled as a porous medium. The aim of the study is to determine how these parameters influence the capacity of vegetation to cool its environment. The study shows that the tree provides maximum cooling at low wind speed, low humidity, low radiation level and large tree height.
Pages: 2129 - 2136