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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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An Experimental Study on the Airside Performance of Fin-and-Tube Heat Exchangers Having Wide Louver Fin

광폭 루버 핀이 장착된 핀-관 열교환기의 공기측 전열 성능에 관한 실험적 연구

  • 김내현 (인천대학교 기계시스템공학부)
  • Received : 2015.02.14
  • Accepted : 2015.03.12
  • Published : 2015.05.10
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Abstract

Heat transfer rate can be increased by increasing the heat transfer area. In this study, wide louver fin-and-tube heat exchangers with $P_t/P_l=1.03$ were tested and compared with louver fin-and-tube heat exchanger with $P_t/P_l=0.6$. Results show that heat transfer capacities of wide louver samples are larger (9.8% at one row, 13.6% at two row and 4.1% at three row) than those of conventional louver samples. Considering the area ratio of 1.78, the increase of heat transfer capacity is rather small, possibly due to the smaller heat transfer coefficient and fin efficiency of the wide louver sample. The j factor of the louver fin was 67% larger at one row, 42% larger at two row and 52% larger at three row. The f factor of the louver fin was 81% larger at one row, 63% larger at two row and 60% larger at three row. The effect of fin pitch on j and f factors are not pronounced and the j factor decreased as the number of tube row increased.

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References

  1. Webb, R. L. and Kim, N.-H., 2005, Principles of Enhanced Heat Transfer, 2nd ed., Taylor and Francis Pub.
  2. Wang, C.-C., 1999, On the airside performance of fin-and-tube heat exchangers, in Heat Transfer Enhancement of Heat Exchangers, eds., S. Kakac, A. E. Bergles, F. Mayinger, H. Yuncu, Kluwer Academic Press, pp. 141-162.
  3. Wang, C.-C., Chi, K.-Y., and Chang, Y.-J., 1998, An experimental study of heat transfer and friction characteristics of typical louver fin-and-tube heat exchangers, Int. J. Heat Mass Transfer, Vol. 41, No. 4/5, pp. 817-822. https://doi.org/10.1016/S0017-9310(97)00154-3
  4. Wang, C.-C., Lee, C.-J., Chang, C.-T., and Lin, S.-P., 1999, Heat transfer and friction correlation for compact louvered fin-and-tube heat exchangers, Vol. 42, pp. 1945-1956. https://doi.org/10.1016/S0017-9310(98)00302-0
  5. Hsieh, C.-T. and Jang, J.-Y., 2012, Parametric study and optimization of louver-finned heat exchangers by Taguchi method, Applied Thermal Eng., Vol. 42, pp. 101-110. https://doi.org/10.1016/j.applthermaleng.2012.03.003
  6. Carija, Z., Francovic, B., Percic, M., and Cavrak, M., 2014, Heat transfer analysis of fin-and-tube heat exchangers with flat and louvered fin geometries, Int. J. Ref., Vol. 45, pp. 160-167. https://doi.org/10.1016/j.ijrefrig.2014.05.026
  7. Saboya, F. E. M. and Sparrow, E. M., 1974, Local and average heat transfer coefficients for one-row plate fin and tube heat exchanger configurations, J. Heat Transfer, Vol. 96, pp. 265-272. https://doi.org/10.1115/1.3450189
  8. Gray, D. L. and Webb, R. L., 1986, Heat transfer and friction correlations for plate fin-and-tube heat exchangers having plain fins, Proceedings of the 9th International Heat Transfer Conference, pp. 2745-2750.
  9. Kim, N.-H., Youn, B., and Webb, R. L., 1999, Airside 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
  10. ASHRAE Standard 41.1, 1986, Standard Method for Temperature Measurement, ASHRAE.
  11. ASHRAE Standard 41.2, 1987, Standard Method for Laboratory Air-Flow Measurement, ASHRAE.
  12. ASHRAE Standard 41.5, 1975, Standard Measurement Guide, Engineering Analysis of Experimental Data, ASHRAE.
  13. ESDU 98005, 1998, 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., pp. 122-129.
  14. Park, B.-B., You, S.-M., Yoon, B., and Yoo, K.-C., 1997, Experimental study of heat transfer and pressure drop characteristics for flow of water inside circular smooth and micro-fin tubes, Korean J. Air Conditioning Refrigeration, Vol. 9, No. 4, pp. 454-461.
  15. Schmidt, T. E., 1949, Heat transfer calculations for extended surfaces, J. of ASRE, Refrigeration Engineering, Vol. 4, pp. 351-357.
  16. Wang, C.-C., Lee, W.-S., and Sheu, W.-J., 2001, A comparative study of compact enhanced fin-and-tube heat exchangers, Int. J. Heat Mass Transfer, Vol. 44, pp. 3565-3573. https://doi.org/10.1016/S0017-9310(01)00011-4
  17. Rich, D. G., 1973, The effect of fin spacing on the heat transfer and friction performance of multi-row, smooth plate fin-and-tube heat exchangers, ASHRAE Trans., Vol. 72, No. 2, pp. 137-145.
  18. Rich, D. G., The effect of number of tube rows on the heat transfer performance of smooth plate-fin-tube heat exchangers, ASHRAE Trans., Vol. 81, No. 1, pp. 307-317.
  19. Wang, C.-C., Tao, W.-H., and Chang, C.-J., 1999, An investigation of the airside performance of the slit fin-and-tube heat exchangers, Int. J. Ref., Vol. 22, pp. 596-603.
  20. Lee, J.-W., Kim, N.-H., and Sim, H.-M., 2011, Heat transfer and pressure drop characteristics of fin-andtube heat exchangers having spiral fins under wet conditions, Int. J. Air-Cond. Ref., Vol. 19, No. 3, pp. 185-193. https://doi.org/10.1142/S2010132511000533
  21. Kim, N.-H., Sin, T.-R., and Lee, E.-R., 2005, Comparison of heat transfer and pressure drop characteristics of heat exchangers having plain fins under dry and wet condition, Int. J. Air-Cond, Ref., Vol. 13, No. 3, pp. 128-137.

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