Numerical study on the effects of aspect ratio and orientation of an urban street canyon on outdoor thermal comfort in hot and dry climate

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• 作者：Fazia Ali-Toudert and Helmut Mayer
• 关键词：Thermal sensation ; Pedestrian comfort ; Urban design ; Street microclimate ; Arid climate ; ENVI-met ; Numerical simulation ; PET
• 刊名：Building and Environment
• 出版年：2006
• 期刊代码：21_03601323
• 类别：et
• 出版时间：2006
• 卷：41
• 期：2
• 页码：94-108
• 文件大小：867 K

摘要

This paper discusses the contribution of street design, i.e. aspect ratio (or height-to-width ratio, H/W) and solar orientation, towards the development of a comfortable microclimate at street level for pedestrians. The investigation is carried out by using the three-dimensional numerical model ENVI-met, which simulates the microclimatic changes within urban environments in a high spatial and temporal resolution. Model calculations are run for a typical summer day in Ghardaia, Algeria (32.40°N, 3.80°E, 469 m a.s.l.), a region characterized by a hot and dry climate. Symmetrical urban canyons, with various height-to-width ratios (i.e. H/W