温熱環境評価と熱伝導に関する研究 The Effect of Conductive Heat Exchange for Evaluation of the Thermal Environment on the Human Body

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日本人の住宅での生活実態に則した温熱環境評価を行うためには,伝導熱授受量を定量的に把握する必要がある.そこで,床面から人体への伝導熱授受量の姿勢による違いが定量化された.立位と椅座位,正座位,胡座(ござ)位,横座位,立て膝(ひざ)位,投げ足位,側臥(そくが)位の各姿勢別に人体と床面との接触部位と接触面積が体表解剖学上の区分ごとに実測され,姿勢別に伝導熱授受量を算出するたあの重み係数が定義された.気温と床温とを組み合わせた温熱環境条件の下で被験者実験が行われ,人体の熱収支が算出された.人体と床面との接触面積比率が約2.5%を超えるような姿勢では,温熱環境を評価する際に,接触による熱伝導の影響を含めた検討の必要性が示された.

The purpose of this paper is to clarify the use of conductive heat exchange in determining total heat exchange between the human body and its environment. To evaluate a thermal environment, it was necessary to clarify the relationship between posture and conductive heat exchange in humans. The contacted surface area between the floor and the human body was measured on each anatomical suface region, respectively. These measurements were made for eight different postures, including standing, sedentary, sitting upright, sitting with legs crossed, sitting with legs sideways, sitting with knees drawn up, sitting with legs stretched and lateral decubitus. The subjects were fifteen females, whose body types ranged from asthenic to obese. New weighting coefficients for calculating the conductive heat exchange were defined for each posture. Experiments were carried out to evaluate the effect of posture on the conductive heat exchange between the human body and the floor surface. Three female subjects were all exposed to the following combined thermal conditions: air temperatures of 24, 26 and 28℃ and floor surface temperatures of equal to air temperatures, 31 and 35℃. Heat balance in the subjects was estimated by using the new weighting coefficients. Determining the conductive heat exchange may be unnecessary for analyzing the total heat exchange in the standing, sedentary and sitting upright postures, while it may be necessary for analyzing the total heat exchange in the sitting with knees drawn up posture, and it is absolutely necessary for analyzing the total heat exchange in the sitting with legs crossed, sitting with legs sideways, sitting with legs stretched and lateral decubitus postures. Determining the conductive heat exchange is absolutely indispensable for estimating the total heat exchange in postures in which the contacted surface area involved approximately over 2.5% of the total body surface area.

収録刊行物

  • 空気調和・衛生工学会 論文集

    空気調和・衛生工学会 論文集 24(72), 23-34, 1999

    公益社団法人 空気調和・衛生工学会

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各種コード

  • NII論文ID(NAID)
    110007996299
  • NII書誌ID(NCID)
    AN00065706
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    0385-275X
  • NDL 記事登録ID
    4640117
  • NDL 雑誌分類
    ZN5(科学技術--建設工学・建設業--都市工学・衛生工学)
  • NDL 請求記号
    Z16-955
  • データ提供元
    CJP書誌  CJP引用  NDL  NII-ELS  J-STAGE 
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