Effects of temperature steps on human skin physiology and thermal sensation response
Effects of temperature steps on human skin physiology and thermal sensation response
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DOI：
10.1016/j.buildenv.2011.05.021
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发表时间：
2011-11-01
影响因子：
7.4
通讯作者：
Lu, Yu-Ting
中科院分区：
文献类型：
--
作者：
Chen, Chen-Peng;Hwang, Ruey-Lung;Lu, Yu-Ting
在湿热地区，空调是调节室内热环境的常用手段。然而，当人们从室外进入空调建筑物时，如果空气温度的瞬时变化超过体温调节能力，则可能会出现热不适并危及健康后果。本文研究了在热瞬变过程中，温度阶跃对热感觉和体温调节的影响。在这项研究中，在由两个微气候控制室组成的气候室中创建了从32/28到24摄氏度的两个温度下降步骤和从20到24摄氏度的一个温度上升步骤，并且评估了受试者的热感觉以及皮肤生理特性的变化，包括皮肤毛细血管血流量（SCBF）、皮肤水分、经表皮水分损失（TEWL）、和皮肤温度的变化。结果表明，温度从32 ℃降至24 ℃后1 min内，热感觉投票（TSV）、皮肤温度和SCBF均出现冷感过度。当温度下降到8 ℃时，TSV与皮肤温度的相关性最好（r = 0.60），与皮肤水分和TEWL的相关性中等（r = 0.42-0.54）。TEWL的适应过程分为两个阶段，表明感觉变化和体温调节之间存在差异。性别特异性的影响发生在体温调节，但不是在主观感觉。研究结果表明，当热过渡区的温度阶跃限制在4 ℃或更低时，体温调节负荷可能得到充分控制。(C)2011爱思唯尔有限公司保留所有权利。
Air-conditioning is frequently used as a means of adjusting indoor thermal environment in hot-and-humid areas. However, when entering an air-conditioned building from outdoors people may experience thermal discomfort and risk health consequence if the instantaneous change of air temperature exceeds the thermoregulatory capacity. A study was conducted to investigate the alteration in thermal perception and in thermoregulation that simultaneously occurred in response to temperature step in a thermal transient. In this study, two temperature down-steps from 32/28 to 24 degrees C and an up-step from 20 to 24 degrees C were created in a climatic chamber consisting of two microclimate-controlled rooms, and subjects were evaluated for change in thermal sensation as well as in skin physiological properties, including skin capillary blood flow (SCBF), skin moisture, transepidermal water loss (TEWL), and skin temperature over the course of acclimation. As the results show, a cold sensation overshot occurred in thermal sensation vote (TSV), skin temperature, and SCBF in 1 min after the temperature dropped from 32 to 24 degrees C. TSV correlated the best with skin temperature (r = 0.60) and moderately with skin moisture and TEWL (r = 0.42-0.54) when the temperature down-step reached 8 degrees C. TEWL acclimated in a two-stage pattern, demonstrating a difference between the sensational change and thermoregulation. The gender-specific influence occurred in thermoregulation but not in subjective sensation. The findings of the study suggest that thermoregulatory burden might be adequately controlled when the temperature step in thermal transition zone is limited to 4 degrees C or lower. (C) 2011 Elsevier Ltd. All rights reserved.