Daytime urban heat island effect in high-rise and high-density residential developments in Hong Kong |
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| Affiliation: | 1. School of Architectural and Environmental design, University of Science and Technology, Iran;2. Faculty of School of Architectural and Environmental design, Iran University of Science and Technology, Tehran, Iran;3. Faculty of Building and Environment Research Laboratory, Iran University of Science and Technology, Tehran, Iran;1. Institute of Future Cities, The Chinese University of Hong Kong, New Territories, Hong Kong;2. School of Architecture, The Chinese University of Hong Kong, New Territories, Hong Kong;1. Doctoral Program, Department of Architecture, SAPPK, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung, 40132, Indonesia;2. Department of Architecture, Universitas Katolik Parahyangan, Indonesia;3. Building Technology Research Group, SAPPK, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung, 40132, Indonesia |
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| Abstract: | Nearly 60% of electrical energy use in Hong Kong is for space conditioning during summer months. The paper investigates the impact of design-related variables on outdoor micro level daytime heat island effect in residential developments in Hong Kong. The paper hypothesizes that the differences in outdoor temperatures within and between residential developments can be explained by the impact of design-related variables on the overall environment. Case studies of three large housing estates reveal urban heat island effect (UHI) in the order of 1.5 °C within an estate, and 1.0 °C between estates. The results indicate that energy efficient designs can be achieved by manipulating surface albedo, sky view factor and total height to floor area ratio (building massing) while maximizing cross ventilation. |
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