Heat Transfer Properties of Cold Weather Liner and Jacket Systems Before and After Laundering

摘要

The heat transfer properties of eight prototype cold weather liner w/jacket systems were compared using the torso and arms sections of the sectional manikin. Evaluation of these liner w/jacket systems was done by measuring the effects on the insulation (clo) and evaporative heat transfer coefficient of replacing the standard liner w/jacket worn with a basic cold weather ensemble with each of the experimental liner w/jacket combinations. These findings suggest that the basic differences existing among the linears are moderated by the addition of a jacket, which adds more or less insulation depending upon its fit in relation to the particular liner worn with it. Considering the insulation provided by all liner w/jacket combinations (laundered and unlaundered), the clo values for the torso-arms areas are within + or - 7% of 4.5 clo; the evaporative heat transfer coefficient values are within + or - 11% of a value of 0.09. These evaluations were done before and after three military launderings. These comparisons between the heat transfer properties of these prototype liner w/jacket systems before and after laundering indicate little differences between them when worn as components of a wet-cold ensemble.