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Heat Transfer and Pressure Drop Characteristics of Plain Finned Heat Exchangers Having 5.0 mm Tubes  

Kim, Nae-Hyun (Department of Mechanical Engineering, University of Incheon)
Cho, Jin-Pyo (Department of Mechanical Engineering, University of Incheon)
Oh, Wang-Ku (Department of Mechanical Engineering, University of Incheon)
Choi, Yong-Hwa (Samsung Electronics)
Gaku, Hayase (Samsung Electronics)
Publication Information
International Journal of Air-Conditioning and Refrigeration / v.16, no.1, 2008 , pp. 9-14 More about this Journal
In this study, pressure drop and heat transfer characteristics of plain finned heat exchangers having 5.0 mm diameter (fin collar 5.3 mm) tubes were investigated. Six samples having different fin pitches (1.1 to 1.3 mm) and tube rows (1 and 2 row) were tested. The fin pitch had a negligible effect on j and f factors. Both j and f factors decreased as the number of tube row increased, although the difference was not significant for the f factor. When compared with the j and f factors of the samples having 7.3 mm diameter tubes, the present j and f factors yielded lower values. However, the j/f ratio was larger at low Reynolds numbers. Possible reasoning is provided from the flow pattern consideration. Comparison with existing correlations were made.
Dry surface; Heat transfer coefficient; Plain fin; Heat exchanger; Pressure drop;
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