衣服の保温性能評価法に関する基礎的研究  [in Japanese] Fundamental Study on Evaluation of Clothing Thermal Insulation  [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
    • 長野 克則 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
    • 持田 徹 [他] 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
    • 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

現在使用されている衣服の保温性能の評価式は,衣服の単なる直列抵抗の形で表現されており,着装の実体よりみた場合に不合理な点が多い.本論文では,着装形態が衣服の保温性能に及ぼす影響について考察し,着装の実体にそくした衣服の保温性能評価法を提案し,被験者およびサーマルマネキンを用いた検証実験を行った.検証実験の結果,皮膚温,着装の分布が衣服の保温性能および全身の総合熱伝達率に影響を及ぼし,寒涼環境では衣服の保温性能が大きくなり放熱を抑える傾向にあることを確認した.また,部位分割モデルに基づく衣服の保温性能評価法は,被服形態や着装形態に関わらず,衣服の保温性能を精度よく評価できることを示した.

Clothing is one of the six main factors which influence man's thermal sensation. Therefore, it is important to learn the characteristics of clothing thermal insulation more precisely. In the present study, the effect of segmental characteristics on clothing thermal insulation is clarified from the following three points of view: considerations on 2-segment model, comparison with ISO-9920 data, and experiments using four young male subjects and a heated thermal manikin. In this paper, segmental clothing resistance values are given for 23-types of garments and 49 clothing ensembles, and a new segment model for evaluating the influence of form of dressing and clothing asymmetry on clothing thermal insulation is proposed. The following conclusions can be reached from this research. 1. In cases where clothing concentrates on particular parts on the body, the larger the original clothing insulation is, the-lower-the-effect-of-added clothing becomes. On the other hand, in cases where clothing scatters on the whole body, the effect of added garments on clothing insulation becomes larger than that of the garment alone. 2. Wearing a pair of gloves or a hat increases clothing thermal insulation effectively, and the larger the original clothing insulation, the larger the effect. 3. The regression line of clothing insulation from the sum of the component garments' becomes curved with a steep slope in light dressing conditions, and with a gentle slope under heavy dressing condition. When thermal exchange between man and his environment is taken into consideration, the effect caused by the error associated with the estimation of clothing insulation becomes larger in light dressing conditions, and becomes smaller in heavy dressing conditions. As a result, when new regression equations for evaluating clothing thermal insulation are calculated, it is effective to define the design data according to the scope. 4. The following equations were derived for estimating clothing insulation: {I_<cl>=1.131ΣI_<cluj>…(0clo&le;ΣI_<cluj<&le;0.7clo), I_<cl>=0.877ΣI_<cluj>+0.178…(ΣI_<cluj>&ge;0.7clo)} where, I_d is the intrinsic clothing insulation of an ensemble in clo units, and I_<cluj> is the effective clothing insulation of the component garment in clo units. 5. In cold and neutral thermal environments, clothing insulation varied by environmental operative temperature by approximately 5 to 10 %. In cases in which the clothing insulation values given for thermal comfort are used to evaluate cold- to neutral-thermal environments, this phenomenon overestimates heat loss and leads to a more severe evaluation of thermal sensation than actually occurs. As a result, this phenomenon operates safely on the evaluation of thermal sensations and may be negligible. 6. From the equations expressed in terms of the sum of the component garments' insulation, it is impossible to evaluate the influence of form of dressing and clothing asymmetry on clothing thermal insulation, but it is possible to evaluate this influence from the equations derived from our segment model.

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(77), 95-107, 2000

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

References:  15

Cited by:  6

Codes

  • NII Article ID (NAID)
    110007996361
  • NII NACSIS-CAT ID (NCID)
    AN00065706
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    0385-275X
  • NDL Article ID
    5369670
  • 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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