摘要
Hypobaric hypoxia is the main environmental feature of the Tibetan plateau which would influence the efficiency of human metabolic heat production and the ability of thermal regulation.In order to understand the influence of the hypoxic environment on the plateau on the thermal comfort of short-term sojourners in Tibet,China,oxygen generators were used to create oxygen-enriched environments,and physiological and psychological reactions of subjects were compared under different oxygen partial pressures(p_(O_(2)))and air temperatures(t_(a)).The results showed that subjects’thermal sensation,thermal comfort and mean skin temperature decreased with a decrease in the oxygen partial pressure.When t_(a)=17℃,the influence of oxygen partial pressure was more pronounced,compared to p_(O_(2))=16.4 kPa,the thermal sensation of subjects under p_(O_(2))=13.7 kPa decreased by 33%.The rate of subjects feeling comfortable decreased by 25%,and the mean skin temperature decreased by 0.7℃.The hypoxic environment of the plateau exacerbates human discomfort.Therefore,it is necessary to fully understand the actual thermal requirements of sojourners in Tibet,China.The results of this study would have implications for a better understanding of thermal comfort characteristics in the hypoxia environment in plateau.
低压缺氧是青藏高原的主要环境特征,低压缺氧环境可能影响人体代谢产热效率和热调节能力。为了解高原缺氧环境对短期入藏人群热舒适的影响,本实验利用制氧机营造富氧环境,对比受试者在不同氧分压(p_(O_(2)))和空气温度(t_(a))下的生理和心理反应。结果表明,受试者热感觉、热舒适和皮肤温度随着氧分压的降低而降低。对比HOE(p_(O_(2))=16.4 kPa)工况,当t_(a)=17℃时氧分压对受试者的影响更为明显,在NOE(p_(O_(2))=13.7 kPa)工况下受试者的热感觉降低了33%,受试者感觉舒适的比例下降25%,平均皮肤温度下降0.7℃。高原的缺氧环境加剧了人体的不适。因此,有必要充分了解入藏人群的实际热需求。本研究结果将有助于更好地理解在高原缺氧环境下的热舒适特征。
作者
DUAN Guan-nan
SONG Cong
LIU Yan-feng
WANG Deng-jia
CAO Rui-xuan
段冠囡;宋聪;刘艳峰;王登甲;曹瑞轩(School of Building Services Science and Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;State Key Laboratory of Green Building in Western China,Xi’an University of Architecture and Technology,Xi’an 710055,China)
基金
Project(U20A20311)supported by the State Key Program of National Natural Science Foundation of China
Project(52008329)supported by the National Natural Science Foundation of China
Project(2018BSHYDZZ14)supported by the Postdoctoral Research Foundation of Shaanxi Province,China。
