In this section, you can access to the latest technical information related to the FUTURE project topic.

Modeling the reduction of urban excess heat by green roofs with respect to different irrigation scenarios

Urban heat reduction by evaporative cooling from extensive green roofs is explored by applying irrigation scenarios to green roofs located in different climate zones using a coupled atmosphere-vegetation-substrate green roof model. The model, which is integrated in the building energy simulation software EnergyPlus, is validated with eddy covariance surface energy fluxes from a green roof in Berlin, Germany. The original model was modified to include interception and an improved runoff calculation. Three irrigation scenarios were defined (no irrigation, sustainable irrigation by harvested runoff water, unrestricted irrigation) to study the heat reduction potential in terms of surface energy partitioning and sensible heat fluxes (QH). The irrigation scenarios are compared to two white roofs (albedo equal to 0.35 and 0.65) and a black roof.

» Author: Jannik Heusinger, David J. Sailor, Stephan Weber

» Reference: Building and Environment, Volume 131

» Publication Date: 01/03/2018

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