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Heat Transfer and Friction Characteristics of Slit Fin and Tube Heat Exchangers in Wet Conditions  

Chang, Keun-Sun (Department of Mechanical Engineering, Sunmoon University)
Phan, Thanh-Long (Department of Mechanical Engineering, Sunmoon University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.19, no.1, 2007 , pp. 1-9 More about this Journal
Abstract
Water condensate accumulated on the surface of a fin-and-tube heat exchanger significantly affects its thermal and hydraulic performance. The purpose of this study is to investigate the effect of condensate retention on the air-side heat transfer performance and flow friction. Total 12 samples of slit and plate fin-and-tube heat exchangers with varying fin spacing and number of tube rows are tested under dry and wet conditions. The thermal fluid measurements are made using a psychometric calorimeter. Frontal air velocity varies in the range from 0.7 m/s to 1.5 m/s. Using the experimental data, presented are the heat transfer coefficients in terms of Colburn j-factor and friction factor.
Keywords
Fin-tube heat exchanger; Slit fin; Wet condition; Heat transfer coefficient; Dehumidification;
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