An investigation of the influence of ground surface properties and shading on outdoor thermal comfort in a high-altitude residential area

• 作者: Lixing Chen Yingzi Zhang Jiaqin Han Xing Li
• 来源期刊: 建筑学研究前沿（英文版）
• 年，卷（期）: 2021,（2）
• 页码范围: 432-446
• 页数: 15页
• 语种: 英文

摘要

Landscape elements in residential areas can effectively improve the outdoor ther-mal environment,with different outcomes depending on the climate conditions.This study ex-plores how the ground surface and shading properties affect the outdoor thermal environment in a high-altitude plateau climate where few studies have been conducted.The measurements were conducted during summer and winter in a residential area in Lhasa,Tibet.Without nat-ural shading such as trees,there is a positive correlation between Sky-view factor (SVF) and Physiological equivalent temperature (PET) during winter and a negative correlation during summer.When SVF exceeds 0.65 in summer,it may cause human discomfort.Compared to arti-ficial shading such as a tensioned membrane,deciduous trees are superior at improving human comfort,as they can increase PET by 10.56 ℃ in winter and decrease it by 9.73 ℃ in summer.During summer,high-reflection water-permeable bricks can reduce the PET by 1.08 ℃,and lawns can reduce the mean radiation temperature (Tmrt) by 1.65 ℃;however,the lawns may produce a microclimate with a high air temperature.The results from this paper can be used as a reference for landscape planning and design in residential areas in high-altitude cold-climate regions.