THE INFLUENCES OF CHIMNEY EFFECT AND PUMPING EFFECT ON THE AIRFLOW IN CLOTHING

  • YAMASAKI Kazuhiko
    Department of Human Environmental Sciences, Jissen Women’s University
  • TORIYAMA Naho
    Department of Human Environmental Sciences, Jissen Women’s University
  • NAGAKURA Yuki
    Department of Human Environmental Sciences, Jissen Women’s University
  • MAEDA Akiko
    Faculty of Education, Gunma University

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Other Title
  • 衣服内気流に及ぼす煙突効果とポンピング効果
  • イフク ウチキリュウ ニ オヨボス エントツ コウカ ト ポンピング コウカ

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The airflow velocity in clothing (AVC) was measured by using the bi-directional airflow sensor in order to observe the chimney effect and the pumping effect. Eight female participants were asked to wear a separate type raincoat and they kept themselves in a stationary state or performed the rhythmic work. The climatic chamber was controlled at 23℃ or 18℃ (RH50% ). The AVC caused by chimney effect was higher at 18℃ than at 23℃ significantly. The highest value (0.43m/sec) was observed at the chest area. The pumping effect triggered by the rhythmic work caused the air in clothing flowed from the trunk towards the cuff or the hem of a raincoat and overwhelmed the chimney effect.

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