Xiling Lu, Shengkai Zhao, Yongchao Zhai, Jianlin Liu
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引用次数: 0
摘要
长时间佩戴口罩会带来热不适,尤其是在气候炎热的城市。口罩的隔热性能及其对室外热舒适度的影响很少被研究。在这项研究中,使用气候箱中的热敏人体模型对五种类型的口罩及其隔热性能进行了测试。实验结果采用生理当量温度(PET)和标准有效温度(SET*)来评估夏季和冬季三种步行速度下佩戴口罩的热舒适度。不同口罩的隔热性能略有不同,PET 和 SET* 值随着口罩隔热性能的增加而上升,且夏季通常高于冬季。此外,在不同步行速度下,使用相同面罩时,SET* 的变化比 PET 更明显。在快速行走时,戴口罩和不戴口罩的 SET* 差异明显增大。研究结果进一步表明,不能简单地认为佩戴口罩会导致个人身体不适,这是衣物隔热性能的额外影响。研究结果丰富了衣物隔热数据库,探索了使用口罩时热指数的差异,并为在户外使用口罩缓解热量提供了建议。
Exploring the effects of mask wearing on outdoor thermal comfort at different walking speeds—A thermal manikin-based experiment
Face masks’ wearing for a long duration brings thermal discomfort, especially in hot climate cities. The face masks’ thermal insulation and its effect on outdoor thermal comfort have been rarely investigated. In this study, five types of face masks and their thermal insulations have been tested by using a thermal manikin in the climate chamber. Experimental results are assessed by using physiological equivalent temperature (PET) and standard effective temperature (SET*) for thermal comfort with masks at three walking speeds both in summer and winter. Slight differences in thermal insulation are observed among the different masks, the values of PET and SET* rise with increasing mask thermal insulation, and they are generally higher in summer than in winter. Moreover, the variation of SET* is more obvious than PET with same masks at different walking speeds. And the differences of SET* with and without masks appear to rise significantly for fast walking. Results further indicate that the individuals’ physical discomfort caused by wearing masks cannot simply be assumed as an additional effect of the clothing thermal insulation. The findings enrich the clothing thermal insulation database, explore the differences in thermal indices if the face mask is used, and provide advice on heat mitigation with masks outdoors.
期刊介绍:
Building Simulation: An International Journal publishes original, high quality, peer-reviewed research papers and review articles dealing with modeling and simulation of buildings including their systems. The goal is to promote the field of building science and technology to such a level that modeling will eventually be used in every aspect of building construction as a routine instead of an exception. Of particular interest are papers that reflect recent developments and applications of modeling tools and their impact on advances of building science and technology.