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http://dx.doi.org/10.3795/KSME-B.2010.34.12.1111

Condensation Heat Transfer and Pressure Drop in Flat Tubes with Different Aspect Ratios  

Kim, Nae-Hyun (Dept. of Mechanical System Engineering, Univ. of Incheon)
Park, Ji-Hoon (Dept. of Mechanical System Engineering, Univ. of Incheon)
Cha, Sang-Jin (Dept. of Mechanical System Engineering, Univ. of Incheon)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.34, no.12, 2010 , pp. 1111-1119 More about this Journal
Abstract
In this study, condensation heat transfer coefficients of R-410A were obtained in flattened tubes made from round tubes with an inner diameter of 5.0 mm. The saturation temperature was $45^{\circ}C$; the heat flux, 10 kW/$m^2K$; the mass flux, 100-400 kg/$m^2s$; and the quality, 0.2-0.8. The results showed that the effect of the aspect ratio on the condensation heat transfer coefficient depended on the flow pattern. For annular flow, the heat transfer coefficient increased as the aspect ratio increased. For stratified flow, however, the reverse was true: the pressure drop increased as the aspect ratio increased. Existing correlations adequately predicted the heat transfer coefficients and pressure drops of the flattened tubes.
Keywords
Low Condensation; Heat Transfer; Pressure drop; Aspect ratio;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By SCOPUS : 0
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