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Heat transfer and flow pattern during two-phase flow boiling of R134a in horizontal smooth and microfin tubes.
Author(s) : YU M. H., LIN T. K., TSENG C. C.
Type of article: Article, IJR article
Summary
Flow pattern and heat transfer during evaporation in a 10.7 mm diameter smooth tube and a micro-fin tube are presented. The evaporation temperature was 6 °C. Flow maps for both the tubes are plotted in the coordinates of mass flux and vapour quality. The relations of flow pattern and local heat transfer coefficient are discussed. The heat transfer coefficients for intermittent and annular flows in both the smooth tube and the micro-fin tube are shown to agree well with Gungor and Winterton's correlation with modified constants.
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Pages: 789-798
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Details
- Original title: Heat transfer and flow pattern during two-phase flow boiling of R134a in horizontal smooth and microfin tubes.
- Record ID : 2003-0102
- Languages: English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 25 - n. 6
- Publication date: 2002/09
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Indexing
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Themes:
Heat transfer;
Two-phase flow - Keywords: Two-phase flow; R134a; Heat transfer coefficient; Finned tube; Microfin tube; Bare pipe; Miniaturization
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