CONVECTIVE HEAT TRANSFER COEFFICIENTS AND CLOTHING INSULATIONS FOR PARTS OF THE CLOTHED HUMAN BODY UNDER CALM CONDITIONS

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  • OGURO Masayuki
    Taisei Corporation
  • ARENS Edward
    Center for Environmental Design Research, Univ. of California
  • de DEAR Richard
    Division of Environmental and Life Sciences, Macquarie University
  • ZHANG Hui
    Center for Environmental Design Research, Univ. of California
  • KATAYAMA Tadahisa
    Dept. of Energy and Environmental Engineering, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University

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Other Title
  • 無風時における人体各部の着衣抵抗および対流熱伝達率の評価
  • Convective heat transfer coefficients and clothing insulations for parts of the clothed human body under airflow conditions

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Convective heat transfer coefficients for calm conditions were evaluated for each part of the clothed human body, and compared to those of the nude body. This was done for both standing and sitting postures, using a heated thermal manikin. Clothing surface temperatures were measured with an infrared imaging radiometer. The convective heat transfer coefficients were larger for the clothed manikin than for the nude manikin, both for the whole body and for the individual body parts. Large differences were observed in the head, the pelvic region, the chest, and the back. This resulted in 40 to 50 % increases of convective heat transfer coefficients for the whole body. Regression models for convection heat transfer under calm condition were presented for use in thermophysiological modeling. Clothing insulations were also evaluated and compared between three methods. The results demonstrate that three methods of estimating clothing insulation can produce significantly different results.

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