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Heat Transfer Characteristics of Flat Plate Finned-Tube Heat Exchangers with a Variation of Fin Pitch and Number of Tube Row  

Kim Yong-Han (Graduate School, Department of Mechanical Engineering, Korea University)
Lee Ho-Seong (Graduate School, Department of Mechanical Engineering, Korea University)
Kim Yong-Chan (School, Department of Mechanical Engineering, Korea University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.17, no.10, 2005 , pp. 930-937 More about this Journal
Abstract
The objective of this study is to investigate the heat transfer performance of flat plate finned-tube heat exchangers with large fin pitch. In this study, twenty-two heat exchangers were tested with a variation of fin pitch, number of tube row, and tube alignment. The heat transfer coefficient decreased with a reduction of the fin pitch and an increase of the number of tube row. The staggered tube alignment improved heat transfer performance more than $10\%$ compared to the inline tube alignment. A heat transfer correlation was developed from the measured data for flat plate finned-tubes with large fin pitch. The correlation yielded good predictions of the measured data with mean deviations of $3.6\%\;and\;6.4\%$ for the inline and staggered tube alignment, respectively.
Keywords
Flat plate fin; Number of tube row; Fin pitch;
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