[의류제품] Clothing Thermal Insulation During Sweating 출판일 : 2003.02.01 저자 : Y.S. Chen, J. Fan, W. Zhang 서지사항 : Textile Research Journal, Volume 73, No 2(2003), 152-157 페이지 등록일 : 2012.06.27 I 조회수 : 121 작성자 : admin |
Heat transfer through clothing is an important topic related to thermal comfort in
environmental engineering and functional clothing design. The total heat transmitted through
clothing is commonly considered as the sum of the dry heat transfer and the evaporative
heat transfer. Clothing thermal insulation measured in a nonperspiring con dition, e.g., on a
dry thermal manikin, is frequently used to calculate the dry heat transfer when the body is
perspiring or even sweating heavily. The effect of perspiration on clothing thermal insulation
with respect to dry heat transfer is not well understood, although it is widely speculated that
perspiration reduces thermal insulation by wetting clothing assemblies. In this investigation,
clothing thermal insulation with very low perspiration and very heavy perspiration is
measured using a novel perspiring fabric thermal manikin. Clothing thermal insulation
decreases during perspiration, and the amount of reduction varies from 2 to 8%, as related
to water accumulation within clothing ensembles. This finding suggests the "after chill"
effect of wearers after heavy exercise may not only be caused by heat absorption due to the
desorption and evaporation of water within clothing, but also to reduced clothing thermal
insulation. Also, for clothing that can absorb a large amount of moisture during sweating,
clothing thermal insulation measured on dry manikins may need to be corrected when used
for calculating dry heat loss (sometimes used for calculating moisture vapor resistance) on
a sweating manikin and predicting thermal comfort during sweating.
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