水平内面ら旋溝付管内におけるCO<Sub>2</Sub>冷媒の沸騰蒸発流に関する実験的研究

桑原 憲, 池田 宗史, 小山 繁

    研究成果: ジャーナルへの寄稿記事

    抜粋

    This paper deals with the experimental study on flow boiling heat transfer of carbon dioxide in a micro-fin tube. The geometrical parameters of micro-fin tube used in this study are 6.07 mm in outer diameter, 5.24 mm in average inner diameter, 0.256 mm in fin height, 20.4 in helix angle, 52 in number of grooves and 2.35 in area expansion ratio. Flow patterns and heat transfer coefficients were measured at 3-5 MPa in pressure, 300-540 kg/(m<Sup>2</Sup>s) in mass velocity and -5 to 15 °C in CO<Sub>2</Sub> temperature. Flow patterns of wavy flow, slug flow and annular flow were observed. The measured heat transfer coefficients of micro-fin tube were 10-40 kW/(m<Sup>2</Sup>K). Heat transfer coefficients were strongly influenced by pressure.
    元の言語Japanese
    ページ(範囲)315-323
    ページ数9
    ジャーナル日本冷凍空調学会論文集
    26
    発行部数3
    DOI
    出版物ステータス出版済み - 2009

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