期刊
SUSTAINABLE CITIES AND SOCIETY
卷 86, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.scs.2022.104149
关键词
Outdoor thermal comfort; Human subject experiment; Urban cooling strategies; Active transportation; Urban microclimate
资金
- School of Architecture, Design and Planning, and the School of Civil Engineering
- University of Sydney
The superimposition of global warming on urban heat islands highlights the importance of outdoor cooling infrastructure for the walkability of cities. This study compared the discomfort experienced during intermittent exercise in outdoor heat to the charging of a capacitor, and provided estimates of the intensity and duration of cooling respite required by pedestrians in overheated urban climates.
Superimposition of global warming on urban heat islands is making outdoor cooling infrastructure critical to the maintenance of walkability of many cities. How to better arrange thermal respite (cooling infrastructure) to maximise pedestrians' thermal comfort is still unclear. In this study, the thermal discomfort accumulating during episodic exercise in outdoor heat was compared to the charging of a capacitor. Skin temperature and core temperature responses were collected from a sample of human participants (n=24) who were exposed to bouts of simulated urban heat stress, while exercising on an ergometer at an intensity corresponding to a brisk walk. Thermal respite (wind and/or shade) was provided to the participants to discharge accumulated heat load after they reached a specific threshold of thermal discomfort. We found that the thermal discomfort capacitor of most participants (75%) became fully charged ('pleasant' -> 'intolerable') after a 0.4 degrees C increment in mean body temperature, and its discharge required a 0.7 degrees C degree-minute decrement in mean skin temperature. The comfort capacitor analogy provides an estimate of the intensity and duration of cooling respite required by pedestrians during brief exposures to overheated urban climates. This provides guidance on engineering interventions to ameliorate overheated urban microclimates.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据