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Effects of indoor thermal exposure on human dynamic thermal adaptation process
Building and Environment ( IF 7.4 ) Pub Date : 2020-07-01 , DOI: 10.1016/j.buildenv.2020.106990
Cong Song , Lei Huang , Yanfeng Liu , Yu Dong , Xiaojun Zhou , Jiaping Liu

Abstract The effects of indoor thermal exposure on human thermal adaptation is a time-dependent process, and deconstructing the human thermal response in a dynamic process helps to reveal the thermal adaptation mechanism. Although many researchers have studied human thermal comfort under different indoor thermal conditions in cross-sectional field investigations, the temporal variation of the human thermal response in the adaptation process remains to be further studied. To study the combined effect of indoor thermal stress and exposure duration on human thermal adaptation, a follow-up study was performed on 30 subjects for nine weeks: they were exposed to three different heating intensities in winter (unheated room, low-level heated room, and high-level heated room). Subjects’ physiological responses to the thermal environmental changes were monitored, and psychological assessment was conducted with questionnaires at indoor temperatures of 14, 18, and 22 °C in a climate chamber in each week. The results showed that indoor thermal exposure exhibited a temporal cumulative effect on human thermal adaptation, and the physiological and psychological adaptation processes were not necessarily synchronous. Prolonged indoor cold exposure not only increased the acceptability of human body to cold exposure, but also elevated the vigilance to warm exposure; skin temperature was increased and sympathetic activity was decreased characterized by lower LF/HF ratio in cold exposure. The research results provide implications for the control of indoor thermal environments based on human adaptability.

中文翻译:

室内热暴露对人体动态热适应过程的影响

摘要 室内热暴露对人体热适应的影响是一个时间依赖的过程,解构人体热反应的动态过程有助于揭示热适应机制。尽管许多研究人员在横截面实地调查中研究了不同室内热条件下的人体热舒适性,但适应过程中人体热反应的时间变化仍有待进一步研究。为了研究室内热应激和暴露时间对人体热适应的综合影响,对 30 名受试者进行了为期 9 周的后续研究:他们在冬季暴露于三种不同的加热强度(未加热房间、低水平加热房间) , 和高级加热室)。监测受试者对热环境变化的生理反应,每周在室内温度为 14、18 和 22 °C 的气候室中通过问卷进行心理评估。结果表明,室内热暴露对人体热适应表现出时间累积效应,生理和心理适应过程不一定同步。室内长时间暴露在寒冷环境中,不仅增加了人体对寒冷暴露的接受度,而且提高了对温暖暴露的警惕性;皮肤温度升高,交感神经活动降低,其特征是在寒冷环境中 LF/HF 比率较低。研究结果为基于人类适应性的室内热环境控制提供了启示。每周在室内温度为 14、18 和 22 °C 的气候室中通过问卷进行心理评估。结果表明,室内热暴露对人体热适应表现出时间累积效应,生理和心理适应过程不一定同步。室内长时间暴露在寒冷环境中,不仅增加了人体对寒冷暴露的接受度,而且提高了对温暖暴露的警惕性;皮肤温度升高,交感神经活动降低,其特征是在寒冷环境中 LF/HF 比率较低。研究结果为基于人类适应性的室内热环境控制提供了启示。每周在室内温度为 14、18 和 22 °C 的气候室中通过问卷进行心理评估。结果表明,室内热暴露对人体热适应表现出时间累积效应,生理和心理适应过程不一定同步。室内长时间暴露在寒冷环境中,不仅增加了人体对寒冷暴露的接受度,而且提高了对温暖暴露的警惕性;皮肤温度升高,交感神经活动降低,其特征是在寒冷环境中 LF/HF 比率较低。研究结果为基于人类适应性的室内热环境控制提供了启示。每周在气候室中保持 22 °C。结果表明,室内热暴露对人体热适应表现出时间累积效应,生理和心理适应过程不一定同步。室内长时间暴露在寒冷环境中,不仅增加了人体对寒冷暴露的接受度,而且提高了对温暖暴露的警惕性;皮肤温度升高,交感神经活动降低,其特征是在寒冷环境中 LF/HF 比率较低。研究结果为基于人类适应性的室内热环境控制提供了启示。每周在气候室中保持 22 °C。结果表明,室内热暴露对人体热适应表现出时间累积效应,生理和心理适应过程不一定同步。室内长时间暴露在寒冷环境中,不仅增加了人体对寒冷暴露的接受度,而且提高了对温暖暴露的警惕性;皮肤温度升高,交感神经活动降低,其特征是在寒冷环境中 LF/HF 比率较低。研究结果为基于人类适应性的室内热环境控制提供了启示。室内长时间暴露在寒冷环境中,不仅增加了人体对寒冷暴露的接受度,而且提高了对温暖暴露的警惕性;皮肤温度升高,交感神经活动降低,其特征是在寒冷环境中 LF/HF 比率较低。研究结果为基于人类适应性的室内热环境控制提供了启示。室内长时间暴露在寒冷环境中,不仅增加了人体对寒冷暴露的接受度,而且提高了对温暖暴露的警惕性;皮肤温度升高,交感神经活动降低,其特征是在寒冷环境中 LF/HF 比率较低。研究结果为基于人类适应性的室内热环境控制提供了启示。
更新日期:2020-07-01
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