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Open Access Publications from the University of California

Evaluation of the effect of air flow on clothing insulation and total heat transfer coefficient for each part of the clothed human body

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The effects of air flow on clothing insulation and on the dry heat transfer coefficients were evaluated for each part of the clothed and nude human body. This was done by measuring clothing surface temperature using an infrared imaging radiometer. The results showed that increasing wind speed causes a decreased in clothing insulation and an increase in the dry heat transfer coefficients. The effects of air penetration on dry heat transfer coefficients could be determined by comparing the heat transfer coefficients of the clothed manikin to those of the nude manikin. Lastly, by comparing clothing insulation results obtained by the conventional indirect method of those of the direct method, in this study, one can demonstrated the limitation of the conventional method and the need for direct estimation.

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