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Experimental Study on the Heat Transfer Characteristics of Spiral Fin-Tube Heat Exchangers  

Yun Rin (Department of Mechanical Engineering, Korea University)
Kim Yongchan (Department of Mechanical Engineering, Korea University)
Kim Sru (Samsung Electronics Co. Visual Display Division)
Choi Jong Min (Department of Mechanical Engineering, Hanbat National University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.17, no.6, 2005 , pp. 529-535 More about this Journal
Abstract
This study experimentally examines the air-side performance of spiral finned tube heat exchangers. The effects of fin spacing, fin height, and tube alignment were investigated. Reduction of fin spacing decreased the Colburn j factor. However, the effect of fin height on the Colburn j factor was negligible. An increase of tube row decreased the Nusselt number for both staggered and in-line tube alignments. However, the decrease of the Nusselt number for the in-line tube alignment was much more significant than that of the staggered tube alignment. The average Nusselt number of the staggered tube alignment was larger than that of the in-line tube alignment by $10\%$ when the Reynolds number ranged from 300 to 1700. An empirical correlation of the Nusselt number was developed by using geometric parameters of heat exchanger and correction factors. The correction factor considered the effects of tube alignment and number of tube rows on the heat transfer. The proposed correlation yielded a mean deviation of $4\%$ from the present data.
Keywords
Spiral finned heat exchanger; Correlation; Fin pitch; Fin height; Staggered tube alignment;
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  • Reference
1 Nuntaphan, A., Kiatsiriroat, T. and Wang, C. C., 2005, Heat transfer and friction characteristics of crimped spiral finned heat exchangers with dehumidification, Applied Thermal Engineering, Vol. 25, pp. 327-340   DOI   ScienceOn
2 Mirkovic, Z., 1974, Heat transfer and flow resistance correlation for helically finned and staggered tube banks, Heat Exchanger: Design and Theory Source Book, Afgan, N. H. and Schlunder, E. U, eds., Scripta, Washington, D. C., pp. 559-584
3 Incropera, F. P. and Dewitt, D. P., 1996, Introduction to Heat Transfer, 3rd ed., John Wiley & Sons, pp. 351-361
4 Holman, J. P., 1992, Heat Transfer, 7nd ed., McGraw- Hill, Singapore, pp. 559-573
5 Halici, F., Taymaz, I. and Gunduz, M., 2001, The effect of the number of tube rows on heat, mass and momentum transfer in flatplate finned tube heat exchanger, Energy, Vol. 24, pp. 963-972
6 Mon, M. S. and Gross, U., 2004, Numerical study of fin-spacing effects in annularfinned tube heat exchangers, Int. J. Heat Mass Transfer, Vol. 47, pp.1953-1964   DOI   ScienceOn
7 Dittus, F. W. and Boelter, L. M. K., 1930, University of California, Berkeley, Publications on Engineering, Vol. 2, p.443