The development and initial validation of a virtual dripping sweat rate and a clothing wetness ratio for use in predictive heat strain models
The development and initial validation of a virtual dripping sweat rate and a clothing wetness ratio for use in predictive heat strain models
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DOI：
10.1007/s00484-013-0736-x
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发表时间：
2014-08-01
影响因子：
3.2
通讯作者：
Hamada, Y.
中科院分区：
文献类型：
--
作者：
Kubota, H.;Kuwabara, K.;Hamada, Y.
本文应用的热平衡方程（HBE）作为一个线性函数的平均皮肤温度（t（sk））由一个新的出汗效率（eta（sw））和近似的体温调节出汗率。在稳态条件下预测t（sk）的方程推导为HBE的解，并用于预测热应变标度。湿衣区的热损失用一个新的变量“虚拟滴汗率VDSR”（S（wdr））来确定。这是受试者在干燥衣服中的未蒸发的汗液速率，来自超过最大蒸发能力的区域汗液速率，并且向衣服添加水分，降低了固有的衣服绝缘。S（wdr）允许对湿衣服区域进行质量平衡分析，确定为衣服湿度（w（cl））。通过结合WCL表面的HBE导出了w（cl），由此给出了WCL区域的蒸发速率和皮肤热损失。对8名穿着典型夏季服装、T恤和裤子的年轻男性受试者的实验结果验证了预测t（sk）的模型，WCL热阻（R（cl，w））被确定为干燥服装（R（cl，d））的25%。
This paper applies the heat balance equation (HBE) for clothed subjects as a linear function of mean skin temperature (t (sk) ) by a new sweating efficiency (eta (sw) ) and an approximation for the thermoregulatory sweat rate. The equation predicting t (sk) in steady state conditions was derived as the solution of the HBE and used for a predictive heat strain scale. The heat loss from the wet clothing (WCL) area was identified with a new variable of 'virtual dripping sweat rate VDSR' (S (wdr) ). This is a subject's un-evaporated sweat rate in dry clothing from the regional sweat rate exceeding the maximum evaporative capacity, and adds the moisture to the clothing, reducing the intrinsic clothing insulation. The S (wdr) allowed a mass balance analysis of the wet clothing area identified as clothing wetness (w (cl) ). The w (cl) was derived by combining the HBE at the WCL surface from which the evaporation rate and skin heat loss from WCL region are given. Experimental results on eight young male subjects wearing typical summer clothing, T-shirt and trousers verified the model for predicting t (sk) with WCL thermal resistance (R (cl,w) ) identified as 25 % of dry clothing (R (cl,d) ).