Chia , Sok Ling and Ahmad, Mohd. Hamdan and Ossen, Dilshan Remaz
(2007)
The Effect of Geometric Shape and Building Orientation on Minimising Solar
Insolation on High-Rise Buildings in Hot Humid Climate.
Journal of Construction in Developing Countries , 12 (1).
pp. 27-38.
ISSN 1823-6499
Abstract
High-rise buildings are experiencing overheating condition in hot humid climate. For a high-rise built form, vertical surfaces are the most critical to the
impact of solar radiation. This study examines the effect of geometric shapes on the total solar insolation received by high-rise buildings. Two generic building
shapes (square and circular) have been studied with variations in width-to-length ratio (W/L ratio) and building orientation using the computer simulation
program ECOTECT V5.2. The results revealed that the circular shape with W/L ratio 1:1 is the most optimum shape in minimising total solar insolation. The square
shape with W/L ratio 1:1 in a north-south orientation receives the lowest annual total solar insolation compared to other square shapes. This optimum shape
(CC 1:1) receives the highest amount of solar insolation on the east-orientated wall, followed by the south-, west- and north-orientated walls respectively. This
study guides designers on choosing optimum geometric shape and appropriate orientation for high-rise buildings.
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