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

被引:174
作者
Priyadarsini, Rajagopalan [1 ]
Hien, Wong Nyuk [2 ]
David, Cheong Kok Wai
机构
[1] Deakin Univ, Sch Architecture & Bldg, Geelong, Vic 3217, Australia
[2] Natl Univ Singapore, Dept Bldg, Singapore 117548, Singapore
关键词
urban heat island; CFD; geometry; facade materials; velocity; temperature;
D O I
10.1016/j.solener.2008.02.008
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
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, facade 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 facade materials and their colours was very significant and the temperature at the middle of a narrow canyon increased up to 2.5 degrees C with the facade 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 HI W ratio for the canyons increased the velocity by up to 35% and reduced the corresponding temperature by up to 0.7 degrees C. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码:727 / 745
页数:19
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