Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Air-Side Performance of Fin-and-Tube Heat Exchangers Having Sine Wave Fins and Oval Tubes

사인 웨이브 핀과 타원관으로 구성된 핀-관 열교환기의 공기측 성능

  • Choi, Byung-Nam (School of Mechanical System Engineering, University of Incheon) ;
  • Yi, Fung (School of Mechanical System Engineering, University of Incheon) ;
  • Sim, Hyun-Min (School of Mechanical System Engineering, University of Incheon) ;
  • Kim, Nae-Hyun (School of Mechanical System Engineering, University of Incheon)
  • 최병남 (인천대학교 기계시스템공학부) ;
  • 풍익 (인천대학교 기계시스템공학부) ;
  • 심현민 (인천대학교 기계시스템공학부) ;
  • 김내현 (인천대학교 기계시스템공학부)
  • Received : 2013.01.09
  • Published : 2013.05.10
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Abstract

Heat transfer and pressure drop characteristics of fin-and-tube heat exchangers having sine wave fins and oval tubes were investigated. Oval tubes having an aspect ratio of 0.6 were made, by deforming 12.7 mm round tubes. Twelve samples, having different fin pitch and tube row, were tested. The effect of fin pitch on the j and f factors was negligible. The effect of the tube row on the j factor, however, was different from that of common fin-and-tube heat exchangers having plain fins and round tubes. The highest j factor was obtained for a two-row configuration, while the lowest one was obtained for a one-row configuration. A possible reason was attributed to the flow mixing characteristics of the sine wave channel of the present geometry. Comparison with a plain fin-and-tube heat exchanger having 15.88 mm O. D. round tube reveals that the present oval fin-and-tube heat exchanger shows generally superior thermal performance, except for the one-row configuration.

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References

  1. Rich, D. G., 1973, The effect of fin spacing on the heat transfer and friction performance of multi-row plate fin-and-tube heat exchangers, ASHRAE Trans., Vol. 79, No. 2, pp. 137-145.
  2. Wang, C. C., Chang, Y. J., Hsieh, Y. C., and Lin, Y. T., 1996, Sensible heat and friction characteristics of plate fin-and-tube heat exchangers havinf plain fins, Int. J. Refrig., Vol. 19, No. 4, pp. 223-230. https://doi.org/10.1016/0140-7007(96)00021-7
  3. Min, C. K., Cho, J. P., Oh, W. K., and Kim, N. H., 2004, Heat transfer and pressure drop characteristics of heat exchangers having plain fins under dry and wet Conditions, Korean J. Air-Cond. and Refrigeration Engineering, Vol. 16, No. 3, pp. 218-229.
  4. Liu, Y. C., Hu, R., Yang, B. C., Chen, I. Y., and Wang, C. C., 2008, Sensible airside performance of fin-and-tube heat exchangers-data with larger diameter tube, ASHRAE Trans., Vol. 114, No. 1, pp. 379-386.
  5. Beecher, D. T. and Fagan, T. J., 1987, Effects of fin pattern on the airside heat transfer coefficients in plate finned tube heat exchangers, ASHRAE Trans., Vol. 93, No. 2, pp. 1961-1984.
  6. Wang, C. C., Fu, W. L. and Chang, C. T., 1997, Heat transfer and friction characteristics of typical wavy fin-and-tube heat exchangers, Exp. Thermal Fluid Science, Vol. 14, pp. 174-186. https://doi.org/10.1016/S0894-1777(96)00056-8
  7. Wang, C. C., Chang, Y. J., and Chiou, N. F., 1999, Effects of waffle height on the airside performance of wavy fin-and-tube heat exchangers, Heat Transfer Eng., Vol. 20, No. 3, pp. 45-56.
  8. Kim, N. H., Youn, B., and Webb, R. L., 1999, Air-side heat transfer and friction correlations for plain fin-and-tube heat exchangers with staggered tube arrangements, J. Heat Transfer, Vol. 121, pp. 662-667. https://doi.org/10.1115/1.2826030
  9. Wang, C. C., Chi, K. Y., and Chang, C. J., 2000, Heat transfer and friction characteristics of plain finand- tube heat exchangers, Part II:Correlation, Int. J. Heat Mass Transfer, Vol. 43, pp. 2693-2700. https://doi.org/10.1016/S0017-9310(99)00333-6
  10. Wang, C. C., Hwang, Y. M., and Lin, Y. T., 2002, Empirical correlations for heat transfer and flow friction characteristics of herringbone wavy fin-and-tube Heat Exchangers, Int. J. Refrig., Vol. 25, pp. 673-680. https://doi.org/10.1016/S0140-7007(01)00049-4
  11. Saboya, S. M. and Saboya, F. E. M., 2001, Experiments on elliptic sections in one- and two-row arrangements of plate fin and tube heat exchangers, Exp. Thermal Fluis Sci., Vol. 24, pp. 65-75.
  12. Min, J. C. and Webb, R. L., 2004, Numerical analyses of effects of tube shape on performance of a finned tube heat exchanger, J. Enhanced Heat Trans., Vol. 11, No. 1, pp. 61-73. https://doi.org/10.1615/JEnhHeatTransf.v11.i1.50
  13. Leu, J. S., Liu, M. S., Liaw, J. S., and Wang, C. C., 2001, A numerical investigation of louvered fin-andtube heat exchangers having circular and oval tube configurations, Int. J. Heat Mass Trans., Vol. 44, pp. 4235-4243. https://doi.org/10.1016/S0017-9310(01)00081-3
  14. Simo Tala, J. V., Bougeard, D., Russeil, S., and Harion, J. L., 2012, Tube pattern effect on thermal hydraulic characteristics in a two-row finned tube heat exchanger, Int. J. Thermal Sci., Vol. 60, pp. 225-235. https://doi.org/10.1016/j.ijthermalsci.2012.05.015
  15. Veerraju, C. and Gopal, M. R., 2010, Heat and mass transfer studies on plate fin-and-elliptical tube type metal hydride reactors, Applied Thermal Engineering, Vol. 30, pp. 673-682. https://doi.org/10.1016/j.applthermaleng.2009.11.015
  16. Rich, D. G., 1975, The effect of the number of tube rows on heat transfer performance of smooth plate fin-and-tube heat exchangers, ASHRAE Trans., Vol. 81, No. 1, pp. 307-317.
  17. Lee, J. W., Park, J. H., Lee, J. P., and Kim, N. H., 2011, Airside performance of in-and-tube heat exchanger having plate or spiral fins made of copper, KSME Trans. B, Vol. 35, No. 3, pp. 269-278.
  18. ASHRAE Standard 41.1, 1986, Standard method for temperature measurement, ASHRAE.
  19. ASHRAE Standard 41.2, 1987, Standard method for laboratory air-flow measurement, ASHRAE.
  20. ASHRAE Standard 41.5, 1975, Standard measurement guide, engineering analysis and experimental data.
  21. ESDU 98005, Design and performance evaluation of heat exchangers:the effectiveness and NTU method, Engineering and Sciences Data Unit 98005 with Amendment A, London ESDU International plc., 1998, pp. 122-129.
  22. Gnielinski, V., 1976, New equations for heat and mass transfer in turbulent pipe flows, Int. Chem. Eng., Vol. 16, pp. 359-368.
  23. Min, J. C., Tao, T. and Peng, X. F., 2003, Efficiency of fins used in a finned oval tube heat exchanger, J. Enhanced Heat Transfer, Vol. 10, No. 3, pp. 323-334. https://doi.org/10.1615/JEnhHeatTransf.v10.i3.70
  24. Webb, R. L. and Iyengar, A., 2001, Oval finned tube condenser and design pressure limits, J. Enhanced Heat Transfer, Vol. 8, pp. 147-158. https://doi.org/10.1615/JEnhHeatTransf.v8.i3.20
  25. Torikoshi, K., Xi, G. N., Nakazawa, Y., and Asano, H., 1994, Flow and heat transfer performance of a plate fin and tube heat exchanger (first report:effect of fin pitch), Heat Transfer 1994, Proceedings of the 10th Int. Heat Transfer Conf., Vol. 4, pp. 411-416.
  26. Rush, T. A., Newell, T. A., and Jacobi, A. M., 1999, An experimental study of flow and heat transfer in sinusoidal wavy passages, Int. J. Heat Mass Transfer, Vol. 42, pp. 1541-1553. https://doi.org/10.1016/S0017-9310(98)00264-6
  27. Webb, R. L. and Kim, N. H., 2005, Principles of Enhanced Heat Transfer, 2nd Edition, Taylor and Francis Pub.

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