Candas V, Libert J P, Vogt J J
Eur J Appl Physiol Occup Physiol. 1975 Apr 4;34(2):97-108. doi: 10.1007/BF00999921.
The authors have determined the coefficient of evaporative heat loss of the human body (he) by means of humidity steps in low air movement (Va less than or equal to 0,2 m/s). Such a determination requires a fully wetted skin and this implies therefore some loss of dripping sweat. The collection of this dripping sweat allows the determination of the total evaporation: this evaporation exists on the skin surface and around the drops during their fall from the skin to the oil pan where dripping sweat is collected. An estimation of this dripping sweat evaporation allows to assess the skin evaporation and, consequently, the evaporative coefficient he. In these experimental conditions: E = S - SNE - 0,0005 SNE (PsH2O - PaH2O) where E is the skin evaporative rate (g/h);S = total sweat rate (g/h);SNE = the nonevaporative sweat rate (g/h);PaH2O = the partial pressure of saturated water (at Ts) on skin (mb) and PaH2O the partial pressure of water vapor in ambient air (mb). The coefficient of evaporative heat loss in low air movement thus found, is 5,18 +/- 0,22 W/m2-mb.
作者通过在低风速（Va≤0.2m/s）条件下改变湿度的方法测定了人体蒸发散热系数（he）。这种测定需要皮肤完全湿润，因此这意味着会有一些滴汗损失。收集这些滴汗可以测定总蒸发量：这种蒸发存在于皮肤表面以及液滴从皮肤落到收集滴汗的油盘的过程中。对这种滴汗蒸发的估算可以用来评估皮肤蒸发量，进而评估蒸发系数he。在这些实验条件下：E = S - SNE - 0.0005 SNE (PsH2O - PaH2O)，其中E是皮肤蒸发速率（g/h）；S = 总出汗速率（g/h）；SNE = 非蒸发出汗速率（g/h）；PaH2O = 皮肤表面饱和水的分压（在Ts时）（mb），PaH2O是环境空气中水蒸气的分压（mb）。由此得出的低风速下的蒸发散热系数为5.18±0.22W/m2-mb。
