Richards Mark G M, Rossi René, Meinander Harriet, Broede Peter, Candas Victor, den Hartog Emiel, Holmér Ingvar, Nocker Wolfgang, Havenith George
EMPA, Swiss Federal Laboratories for Materials Testing and Research, St. Gallen, Switzerland.
Int J Occup Saf Ergon. 2008;14(1):69-76. doi: 10.1080/10803548.2008.11076750.
The purpose of this study was to investigate the effect of moisture on the heat transfer through clothing in relation to the water vapour resistance, type of underwear, location of the moisture and climate. This forms part of the work performed for work package 2 of the European Union THERMPROTECT project. Thermal manikin results of dry and wet heat loss are presented from different laboratories for a range of 2-layer clothing with similar dry insulations but different water vapour permeabilities and absorptive properties. The results obtained from the different manikins are generally consistent with each other. For each climate, total wet heat loss is predominately dependent on the permeability of the outer layer. At 10 degrees C, the apparent evaporative heat loss is markedly higher than expected from evaporation alone (measured at 34 degrees C), which is attributed to condensation within the clothing and to increased conductivity of the wet clothing layers.
本研究的目的是调查湿度对通过衣物的热传递的影响,涉及水汽阻力、内衣类型、湿度位置和气候。这是为欧盟THERMPROTECT项目工作包2所开展工作的一部分。来自不同实验室的热人体模型给出了一系列两层衣物的干热损失和湿热损失结果,这些衣物具有相似的干绝缘性能,但水汽渗透率和吸收性能不同。从不同人体模型获得的结果总体上相互一致。对于每种气候,总的湿热损失主要取决于外层的渗透率。在10摄氏度时,表观蒸发热损失明显高于仅由蒸发所预期的值(在34摄氏度下测量),这归因于衣物内部的凝结以及湿衣物层传导率的增加。