Expansion of effective wet bulb globe temperature for vapor impermeable protective clothing
Expansion of effective wet bulb globe temperature for vapor impermeable protective clothing
复制标题
防潮防护服有效湿球温度的扩展
DOI：
10.1016/j.jtherbio.2017.10.016
复制
发表时间：
2018
影响因子：
2.7
通讯作者：
Kohei Kuwabara
中科院分区：
文献类型：
--
作者：
Tomonori Sakoi;Tohru Mochida;Yoshihito Kurazumi;Shin-ichi Sawada;Yosuke Horiba;Kohei Kuwabara
湿球地球仪温度（WBGT）是一种有效的风险筛选措施，以防止热损失。然而，WBGT的热风险评估需要根据服装进行调整。在这项研究中，我们提出了一个新的有效WBGT（WBGTeff*）的一般蒸汽渗透性服装合奏和蒸汽不渗透性防护服，适用于从事中等强度的工作，代谢产热量值约为174 W/m2的乘员。WBGTeff* 能够基于人体的热平衡将热应力转换为穿着基本服装套装（工作服）的乘员所经历的尺度。我们证实，WBGTeff* 是有效的，为居住者穿着蒸汽不可渗透的防护服的规定区域表示的关键热环境。基于WBGTeff*，我们成功地阐明了当热应力由自然湿球、地球仪和空气温度的加权和截距表示时，自然湿球、地球仪和空气温度的权重和截距如何根据服装性能和周围环境因素而变化。与普通透湿服装相比，透湿服装WBGTeff* 的环境温度（地球仪和空气温度）权重增加，而自然湿球温度权重降低。对于WBGTeff* 在室外条件下的太阳能负载，地球仪温度的权重比增加，空气温度的权重比减少空气流速。提出了适用于一般透湿服装和不透湿防护服的WBGTeff* 的近似方程。
The wet bulb globe temperature (WBGT) is an effective measure for risk screening to prevent heat dISOrders. However, a heat risk evaluation by WBGT requires adjustments depending on the clothing. In this study, we proposed a new effective WBGT (WBGTeff*) for general vapor permeable clothing ensembles and vapor impermeable protective clothing that is applicable to occupants engaged in moderate intensity work with a metabolic heat production value of around 174 W/m2. WBGTeff*enables the conversion of heat stress into the scale experienced by the occupant dressed in the basic clothing ensemble (work clothes) based on the heat balances for a human body. We confirmed that WBGTeff*was effective for expressing the critical thermal environments for the prescriptive zones for occupants wearing vapor impermeable protective clothing. Based on WBGTeff*, we succeeded in clarifying how the weights for natural wet bulb, globe, and air temperatures and the intercept changed depending on clothing properties and the surrounding environmental factors when heat stress is expressed by the weighted sum of natural wet bulb, globe, and air temperatures and the intercept. The weight of environmental temperatures (globe and air temperatures) for WBGTeff*for vapor impermeable protective clothing increased compared with that for general vapor permeable clothing, whereas that of the natural wet bulb temperature decreased. For WBGTeff*in outdoor conditions with a solar load, the weighting ratio of globe temperature increased and that of air temperature decreased with air velocity. Approximation equations of WBGTeff*were proposed for both general vapor permeable clothing ensembles and for vapor impermeable protective clothing.