Quantitative evaluation of passive cooling of the UCL microclimate in hot regions in summer,case study: urban streets and courtyards with trees |
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| Affiliation: | 1. Construction Research Center (CRC), Institute for Smart Infrastructure and Innovative Construction, Faculty of Civil Engineering, Universiti Teknologi Malaysia, Skudai 81310, Johor, Malaysia;2. Center of Built Environment in the Malays World (KALAM), Faculty of Built Environment, Universiti Teknologi Malaysia, Skudai 81310, Johor, Malaysia;1. Strategic Landscape Planning and Management, School of Life Sciences, Weihenstephan, Technische Universität München, Emil-Ramann-Str. 6, 85354 Freising, Germany;2. Forest Growth and Yield Science, School of Life Sciences, Weihenstephan, Technische Universität München, Hans-Carl-von-Carlowitz-Platz 2,85354 Freising, Germany;1. School of Energy and Environment, City University of Hong Kong, HKSAR, Hong Kong;2. Department of Architecture and Civil Engineering, City University of Hong Kong, HKSAR, Hong Kong;3. Department of Meteorology and Climate Science, Federal University of Technology, Akure, Nigeria;4. School of Architecture and Planning, University of Witwatersrand, Johannesburg, South Africa;1. School of Architecture and Civil Engineering, Chengdu University, China;2. Department of Building, Civil and Environmental Engineering, Concordia University, Canada |
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| Abstract: | This paper presents a quantitative analysis for predicting the air temperature variations within urban clusters with trees. The clusters considered are streets and attached courtyards which together constitute a major part of the residential areas. In this study, the cooling effect of trees is quantified, using the analytical “Green CTTC model” developed recently by the authors. The results are validated by empirical estimates of measurements in situ. The empirical and analytical approaches provide corroborative estimates and conclusions. Sensitivity analysis on the thermal impact of certain major control factors for design purposes, such as cluster deepening, albedo modification, and orientation in the presence of shade trees were obtained by simulations using the analytical model. The results indicate that the combined simulated cooling effect of the above three factors is about , at midday in summer (July–August) in the Mediterranean coastal region of Israel, a cooling which is about 50% of the air temperature rise from sunrise to noon hours. |
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