Adaptive comfort model for tree-shaded outdoors in Taiwan |
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Authors: | Reuy-Lung Hwang Tzu-Ping Lin Ming-Jen Cheng Jen-Hao Lo |
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Affiliation: | 1. Department of Architecture, National United University, 1 Lienda, Miaoli 360, Taiwan;2. Department of Leisure Planning, National Formosa University, 64 Wen-hua Road, Huwei, Yunlin 632, Taiwan;3. Department of Architecture, Feng Chia University, 100 Wen-hwa Road, Taichung 407, Taiwan |
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Abstract: | Tree-shaded outdoors can reduce the heat effect by ameliorating the microclimate and enhancing the human thermal comfort outdoors; for this reason, they are main places for rest, recreation and social activity in Taiwan's cities. Field comfort surveys of 3839 interviewees were conducted in tree-shaded spaces throughout a year. The aims were to obtain a better understanding of human thermal comfort response outdoors and to propose an adaptive comfort model for tree-shaded spaces. A comfort zone, centering on neutral operative temperature which is an empirically derived linear function of mean monthly outdoor temperature, of 6 °C for 90% acceptability and 8 °C for 80% acceptability was suggested for tree-shaded spaces from surveyed data, adding that a non-linear function of the temperature difference between actual operative temperature and neutral operative temperature was established that aims to predict the percentage of heat or cold discomfort at a particular outdoor thermal condition. An application of the established adaptive comfort model on an actual tree-shaded space was demonstrated to show its practicality in long-term evaluation of a particular thermal environment. |
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