Convective heat transfer coefficients and clothing insulations for parts of the clothed human body under airflow conditions

Masayuki Oguro, Edward Arens, Richard de Dear, Hui Zhang, Tadahisha Katayama

    Research output: Contribution to journalArticle

    Abstract

    Convective heat transfer coefficients for each part of the clothed human body were evaluated under airflow conditions and compared to those of nude body. This was done by measuring clothing surface temperatures on a seated and standing manikin using an infrared-imaging radiometer. The convective heat transfer coefficients for the clothed manikin were larger than for the nude manikin. The difference could be 100 to 200% for some individual parts, and for the overall body the difference was 30 to 50%. These results were consistent for both standing and sitting postures, or for facing upwind and facing downstream, although slightly larger differences between clothed and nude could be seen when the manikin was sitting and facing upwind than in the other conditions. Clothing insulation for each part was also estimated. Some differences between standing and sitting were observed at the body part level. However for the whole body the difference was small. Regression models for convective heat transfer coefficients and clothing insulation for all body parts were presented for use in human thermal modeling.
    Original languageEnglish
    Pages (from-to)21-29
    Number of pages9
    JournalJournal of Architectural Planning and Environmental Engineering
    Volume67
    Issue number561
    DOIs
    Publication statusPublished - 2002

    Keywords

    • convective heat transfer
    • clothing insulation
    • infra-red thermography
    • human body
    • thermal comfort
    • airflow

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