Microclimatic modeling of the urban thermal environment of Singapore to mitigate urban heat island

Rajagopalan, Priyadarsini, Wong, Nyuk Hien and Cheong, Kok Wai David 2008, Microclimatic modeling of the urban thermal environment of Singapore to mitigate urban heat island, Solar energy, vol. 82, no. 8, pp. 727-745.

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Title Microclimatic modeling of the urban thermal environment of Singapore to mitigate urban heat island
Author(s) Rajagopalan, Priyadarsini
Wong, Nyuk Hien
Cheong, Kok Wai David
Journal name Solar energy
Volume number 82
Issue number 8
Start page 727
End page 745
Total pages 19
Publisher Pergamon
Place of publication Oxford, England
Publication date 2008-08
ISSN 0038-092X
Keyword(s) urban heat island
CFD
geometry
façade materials
velocity
temperature
Summary This study investigates the urban heat island effect in Singapore and examines the key factors causing this effect. The possibilities of improving heat extraction rate by optimizing air flow in selected hot spots were explored. The effect of building geometry, façade materials and the location of air-conditioning condensers on the outdoor air temperature was explored using computational fluid dynamics (CFD) simulations. It was found that at very low wind speeds, the effect of façade materials and their colours was very significant and the temperature at the middle of a narrow canyon increased up to 2.5 °C with the façade material having lower albedo. It was also found that strategically placing a few high-rise towers will enhance the air flow inside the canyon thereby reducing the air temperature. Adopting an optimum H/W ratio for the canyons increased the velocity by up to 35% and reduced the corresponding temperature by up to 0.7 °C.
Language eng
Field of Research 120202 Building Science and Techniques
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2008, Elsevier Ltd
Persistent URL http://hdl.handle.net/10536/DRO/DU:30017191

Document type: Journal Article
Collection: School of Architecture and Built Environment
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