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Effects of mask wearing duration and relative humidity on thermal perception in the summer outdoor built environment

引用

Building Simulation 2023年第9期16卷 1601-1616页

作者： Rong Hu Jianlin Liu Yongxin Xie Jiao Jiao Zhaosong Fang Borong Lin College of Environmental Science and Engineering Donghua UniversityShanghaiChina Department of Building Science School of ArchitectureTsinghua UniversityBeijingChina School of Civil Engineering Guangzhou UniversityGuangzhouChina Department of Building Environment and Energy Engineering The Hong Kong Polytechnic UniversityKowloonHong KongChina

During the pandemic,face masks are one of the most significant self-protection necessities,but they also cause heat *** using the ERA5(ECMWF Reanalysis 5th Generation)database and the local weather bureau data,the effect of mask wearing on outdoor thermal sensation has been investigated by a survey conducted in the hot summer and cold winter region of eastern China in the summer of *** show that wearing a face mask for a longer period result in a higher level of discomfort,and the primary source of discomfort is hot and stuffy *** effect of relative humidity is crucial for mask wearers in warm-biased thermal environments,as mean thermal sensation vote(TSV)peaks when environmental relative humidity reaches the range of 70%to 80%and decreases after this range due to the evaporation within the microclimate created by a face ***,prolonged mask wearing increases participants’hot feelings,especially in warm ***,participants wearing face masks for less than 30 min feel hot at a physiological equivalent temperature(PET)value of 34.4℃,but those who wear them for over 60 min express hot feelings even at a PET value of 24.7℃.The participants who wear a face mask while walking slowly outdoors have similar thermal sensations to those who do not wear a mask,but are in a higher activity *** findings demonstrate that mask wearing has a crucial impact on outdoor thermal comfort assessment in a warm-biased outdoor thermal environment.

关键词： outdoor thermal comfort disposable medical masks mask wearing duration relative humidity physiological equivalent temperature(PET)

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