換気効率に対する人体周辺対流の影響の水槽実験について : 第1報-天井付排気口と居住者の位置関係について  [in Japanese] Effect of Metabolic Heat of Occupant in A Water Tank Ventilation Effect Test : Part 1 Effect of Relative Locations of A Body and Evacuation Openings  [in Japanese]

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Abstract

居住者が発生する換気対象の室内における流動には代謝熱により発生する自然対流が関わる。強制換気の行われる部屋におけるこの影響を調べるために水槽モデルによる実験を行った。1〜2名で使用する小部屋の縮尺1/5の水槽と円柱形発熱モデルを使用し、グラスホフ数とレイノルズ数を相似則により合せて実験を行った。実験結果の検討のために熱直接排除率と給水バイパス率を導入した。天井付き排気口と、居住者との位置関係による換気効率の変化を実験した。自然対流が直接排気口に到達し、かつ排気口がこれを吸い込みやすい形状の場合、熱直接排除率は大きかったが、排気口と発熱モデルの平面上の位置がずれている場合や、排気口前面に拡散板がある場合にはこの率の差は10%程度であった。

The movement of occupant's body odor in a ventilated room is influenced by the natural convection caused by occupant's metabolic heat dissipation. This effect was examined experimentally using a scale contracted water tank and heated cylindrical model of an occupant. The water tank was a model of a room which was contracted to 1/5. The Grashof number of the heated model was equalized to attain the same natural convection to an occupant, and the Reynolds number of the water flow was equalized to attain the same forced water flow to the object room. Direct heat evacuation ratio and supply water bypass ratio were introduced to evaluate the ventilation efficiency. The effect of the relative positions of the outlet and the model was examined as a preparatory experiment. A high direct heat evacuation ratio was found in the arrangement, where the natural convection arrived directly to the outlet, and the shape of the outlet had a form to catch the natural convection exclusively. The direct heat evacuation ratio varied slightly in the other arrangements.

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 26(81), 71-79, 2001

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

References:  21

Cited by:  1

Codes

  • NII Article ID (NAID)
    110007996392
  • NII NACSIS-CAT ID (NCID)
    AN00065706
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    0385-275X
  • NDL Article ID
    5748167
  • 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  IR  J-STAGE 
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