平均皮膚温・ぬれ面積率と等温感線の形状  [in Japanese] Loci of Equal Thermal Sensation Line with Varying Characteristics of Mean Skin Temperature and Skin Wettedness  [in Japanese]

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Author(s)

    • 佐古井 智紀 SAKOI Tomonori
    • 北海道大学大学院工学研究科都市環境工学専攻 Division of Urban and Environmental Engineering, Graduate School of Engineering Science, Hokkaido University
    • 持田 徹 MOCHIDA Tohru
    • 北海道大学大学院工学研究科都市環境工学専攻 Division of Urban and Environmental Engineering, Graduate School of Engineering Science, Hokkaido University
    • 長野 克則 [他] NAGANO Katsunori
    • 北海道大学大学院工学研究科都市環境工学専攻 Division of Urban and Environmental Engineering, Graduate School of Engineering Science, Hokkaido University
    • 嶋倉 一實 SHIMAKURA Kazumi
    • 北海道大学大学院工学研究科都市環境工学専攻 Division of Urban and Environmental Engineering, Graduate School of Engineering Science, Hokkaido University

Abstract

人の温熱感覚と良い対応を示す生理量として,熱ストレスを表す平均皮膚温と体温調節ストレインを表すぬれ面積率が広く用いられている.本論文では,暑熱領域において椅座読書・裸体・静穏気流下で行った被験者実験から得られた,平均皮膚温,ぬれ面積率,蒸汗放熱量の変化特性および式展開から,等温感線が湿り空気線図上で負の勾配を持つ上に凸の曲線となること,平均皮膚温とぬれ面積率が温度感覚に相乗的に作用し,結果として等温感線は高湿度ほど等ぬれ面積率線に近づき,低湿度に移行するに従い等平均皮膚温線に近づく性向を持つことを示した.また,実際に算出される(S)ET^*が湿度の影響を過大に評価していることを確認した.

Mean skin temperature and skin wettedness are widely used as parameters in good relation to man's thermal sensation. It is said that mean skin temperature is closely related to the heat stress, and that skin wettedness is to the thermoregulatory strain. In the present research, the authors paid attention to mean skin temperature and skin wettedness when man felt constant thermal sensation and reanalyzed the results of 21 experiments in which 4 young naked male subjects under sitting-reading felt "equal warm sensation". All of these experiments were conducted in a still-air test chamber. From the characteristic change of mean skin temperature, skin wettedness and evaporation heat loss and development of formulae, the following concussions were obtained. 1. The observed and calculated differential coefficient of equal "warm" sensation line on the psychrometric chart shows all minus. The values indicate larger in the higher humidity environment and smaller in the lower humidity environment. 2. The effect of humidity on thermal sensation is larger under the higher humidity environment and it decreases with the shift to the lower humidity environment. 3. Under the environments where man feels an equal warm sensation, mean skin temperature and skin wettedness don't hold constant value but varied with the environmental conditions. The effect of wettedness on thermal sensation is larger under the higher humidity environment and less under the lower humidity environment. As the results, when man feels an equal thermal sensation, the change of mean skin temperature is larger under the conditions with larger skin wettedness i.e. under higher humidity conditions and is smaller under conditions with smaller skin wettedness i.e. under lower humidity conditions 4. In warm or hot environments, the locus of equal thermal sensation lines are close to constant skin wettedness lines under the high humidity environments and are close to constant mean skin temperature lines under low humidity environments. 5. (S)ET^* calculated actually evaluated the effect of humidity excessively.

Journal

  • Transactions of the Society of Heating,Air-conditioning and Sanitary Engineers of Japan

    Transactions of the Society of Heating,Air-conditioning and Sanitary Engineers of Japan 25(79), 11-17, 2000

    The Society of Heating, Air-Conditioning & Sanitary Engineers of Japan

References:  10

Cited by:  4

Codes

  • NII Article ID (NAID)
    110007996372
  • NII NACSIS-CAT ID (NCID)
    AN00065706
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    0385-275X
  • NDL Article ID
    5545294
  • NDL Source Classification
    ZN5(科学技術--建設工学・建設業--都市工学・衛生工学)
  • NDL Call No.
    Z16-955
  • Data Source
    CJP  CJPref  NDL  NII-ELS  J-STAGE 
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