Investigation on the Thermal Condition of a Traditional Cold-Lane in Summer in Subtropical Humid Climate Region of China

Hui Chen, Yin Wei, Yaolin Lin, Wei Yang, Xiaoming Chen, Maria Kolokotroni, Xiaohong Liu and Guoqiang Zhang
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Hui Chen: College of Architecture, Hunan University, Changsha 410082, China
Yin Wei: College of Architecture, Hunan University, Changsha 410082, China
Yaolin Lin: School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
Wei Yang: Faculty of Architecture, Building and Planning, The University of Melbourne, Melbourne 3010, Australia
Xiaoming Chen: College of Architecture, Hunan University, Changsha 410082, China
Maria Kolokotroni: Mechanical and Aerospace Engineering Department, Brunel University London, Brunel UB8 3PH, UK
Xiaohong Liu: College of Architecture, Hunan University, Changsha 410082, China
Guoqiang Zhang: College of Architecture, Hunan University, Changsha 410082, China

Energies, 2020, vol. 13, issue 24, 1-21

Abstract: A Chinese traditional narrow street, named Cold-Lane, can create a microclimatic zone that provides pedestrian thermal comfort under hot and humid climate conditions. This phenomenon was observed through experimental measurement during the summer of 2016. The heat transfer rate over the pedestrian body surface was calculated to reveal why pedestrians experience a cool sensation, and computational flow dynamics (CFD) simulation was carried out to study the influence of the street aspect ratio on the shading effect. It was found that the perception of thermal comfort can be attributed mainly to the radiation between the relatively cool surrounding walls and the human body, and the wind velocity has little effect on sensible heat dissipation. The cool horizontal and vertical surfaces in the street canyon are mainly due to the shading effect as a result of the small aspect ratio, which is a typical characteristic of the traditional Chinese street. The shading effect of the high walls on both sides creates the cooling effect of this narrow street.

Keywords: street canyon; pedestrian thermal comfort; radiant cooling; solar shading; night ventilation; traditional Chinese street (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
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