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

Translated title of the contribution: Experimental Study on Flow Boiling of Carbon Dioxide in a Horizontal Microfin Tube

桑原 憲, 池田 宗史, 小山 繁

    Research output: Contribution to journalArticle

    Abstract

    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.
    Original languageJapanese
    Pages (from-to)315-323
    Number of pages9
    Journal日本冷凍空調学会論文集
    Volume26
    Issue number3
    DOIs
    Publication statusPublished - 2009

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    Boiling liquids
    Heat transfer coefficients
    Carbon dioxide
    Fins (heat exchange)
    Flow patterns
    Heat transfer
    Temperature

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    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.

    In: 日本冷凍空調学会論文集, Vol. 26, No. 3, 2009, p. 315-323.

    Research output: Contribution to journalArticle

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    abstract = "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>2s) in mass velocity and -5 to 15 °C in CO<Sub>2 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>2K). Heat transfer coefficients were strongly influenced by pressure.",
    author = "憲 桑原 and 宗史 池田 and 繁 小山",
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    AU - 小山, 繁

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