冷媒R134aの管外凝縮熱伝達率に及ぼすフィン形状の影響

Translated title of the contribution: Effect of Fin Geometry on Condensation Heat Transfer of Refrigerant R134a on Enhanced Finned Tubes

高橋 宏行, 佐伯 主税, 小山 繁

    Research output: Contribution to journalArticle

    Abstract

    This paper presents the experimental results on the outside condensation heat tral1sfer coefficient of horizontal enhanced filmed tubes. Three different fin geometry types of three-dimensional enhanced finned tubes were tested. A low-fin-tube (LFT) 19 fin-per-inch (fpi) was also tested for reference. Experimental refrigerant used was R134a. The heat tral1sfer coefficient test was carried out at a condensing temperature of 40°C, at a cooling water velocity of 1.5 m/s, and the heat flux of 10 to 110 kW/m<sup>2</sup>K. The outside condensation heat transfer coefficient of all three dimensional enhanced finned tubes were approximately 1.9 times higher than that of LFTl9fpi at high heat flux range. In low heat flux range, the enhanced finned tube of small circumferential segmentation pitches at the fin tip was shown the highest outside heat transfer coefficient for all tubes tested.
    Original languageJapanese
    Pages (from-to)57-65
    Number of pages9
    Journal日本冷凍空調学会論文集
    Volume23
    Issue number1
    DOIs
    Publication statusPublished - Mar 31 2006

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    Fins (heat exchange)
    Refrigerants
    Heat flux
    Condensation
    Heat transfer
    Heat transfer coefficients
    Geometry
    Cooling water
    Temperature
    Hot Temperature

    Cite this

    冷媒R134aの管外凝縮熱伝達率に及ぼすフィン形状の影響. / 高橋宏行; 佐伯主税; 小山繁.

    In: 日本冷凍空調学会論文集, Vol. 23, No. 1, 31.03.2006, p. 57-65.

    Research output: Contribution to journalArticle

    高橋宏行 ; 佐伯主税 ; 小山繁. / 冷媒R134aの管外凝縮熱伝達率に及ぼすフィン形状の影響. In: 日本冷凍空調学会論文集. 2006 ; Vol. 23, No. 1. pp. 57-65.
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    abstract = "This paper presents the experimental results on the outside condensation heat tral1sfer coefficient of horizontal enhanced filmed tubes. Three different fin geometry types of three-dimensional enhanced finned tubes were tested. A low-fin-tube (LFT) 19 fin-per-inch (fpi) was also tested for reference. Experimental refrigerant used was R134a. The heat tral1sfer coefficient test was carried out at a condensing temperature of 40°C, at a cooling water velocity of 1.5 m/s, and the heat flux of 10 to 110 kW/m2K. The outside condensation heat transfer coefficient of all three dimensional enhanced finned tubes were approximately 1.9 times higher than that of LFTl9fpi at high heat flux range. In low heat flux range, the enhanced finned tube of small circumferential segmentation pitches at the fin tip was shown the highest outside heat transfer coefficient for all tubes tested.",
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    AB - This paper presents the experimental results on the outside condensation heat tral1sfer coefficient of horizontal enhanced filmed tubes. Three different fin geometry types of three-dimensional enhanced finned tubes were tested. A low-fin-tube (LFT) 19 fin-per-inch (fpi) was also tested for reference. Experimental refrigerant used was R134a. The heat tral1sfer coefficient test was carried out at a condensing temperature of 40°C, at a cooling water velocity of 1.5 m/s, and the heat flux of 10 to 110 kW/m2K. The outside condensation heat transfer coefficient of all three dimensional enhanced finned tubes were approximately 1.9 times higher than that of LFTl9fpi at high heat flux range. In low heat flux range, the enhanced finned tube of small circumferential segmentation pitches at the fin tip was shown the highest outside heat transfer coefficient for all tubes tested.

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