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Analysing the effect of cool and green roof design scenarios on building energy loads and air temperature at pedestrian level in a hot arid climate

Lookup NU author(s): Mohamed Elnabawy Mahgoub, Dr Neveen Hamza


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This study compared the effect of roof retrofit technologies, green roofs and a high albedo coated ‘cool roof’ to a typical concrete roof in order to mitigate the urban heat island effect and building cooling energy demand in an extreme hot arid climate. Dynamic energy simulations predicted a 9.2% and 7.5% reduction on the cooling load for the cool and green roofs, respectively, compared to the conventional. In the urban microclimate simulations, the air temperature difference at pedestrian level for the modelled cool and green roofs was -0.8oC and -0.6oC compared to the conventional, and the average surface temperature for the roofs’ external layer was 31.5oC (cool) and 31.3oC (green) compared to 40.2oC (conventional).

Publication metadata

Author(s): Elnabawi M, Hamza N, Sedki A

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: PLEA SANTIAGO 2022 Will Cities Survive?

Year of Conference: 2022

Pages: 314-319

Print publication date: 22/11/2022

Acceptance date: 09/09/2022

Series Editor(s): Bustamante W; Andrade M; Ortiz P