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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Empirical Correlations of Frost Properties on the Fin of a Heat Exchanger

열교환기 핀에서의 서리층 물성치에 대한 실험 상관식

  • 김경민 (한양대학교 대학원 기계공학과) ;
  • 이관수 (한양대학교 기계공학부)
  • Published : 2009.11.10
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Abstract

In this study, fin surface temperature and frost properties, i.e., frost thickness and frost surface temperature on a heat exchanger, were experimentally analyzed with different fin thicknesses, fin sizes and thermal conductivities of fin. As a result, it is found that fin thickness and thermal conductivity of fin should be considered in order to design an efficient heat exchanger fin. Correlations of dimensionless average frost properties were proposed as functions of dimensionless air temperature, dimensionless fin base temperature, dimensionless fin thickness, absolute air humidity, Reynolds number and Fourier number. The correlations predicted well the average frost thickness with a maximum error of 10.5% and frost surface temperature with a maximum difference of $0.89^{\circ}C$, respectively.

Keywords

References

  1. Yonko, J. D. and Sepsy, C. F., 1967, An investigation of the thermal conductivity of frost while forming on a flat horizontal plate, ASHRAE Trans., Vol. 73, No. 2, pp. I11-I111
  2. Lee, K. S., Kim, W. S. and Lee, T. H., 1997, A one-dimensional model for frost formation on a cold flat surface, Int. J. Heat Mass Transfer, Vol. 40, No. 18, pp. 4359-4365 https://doi.org/10.1016/S0017-9310(97)00074-4
  3. Mao, Y., Besant, R. W. and Falk, J., 1993, Measurement and correlations of frost properties with laminar airflow at room temperature over a flat plate, ASHRAE Trans., Vol. 99, pt 1, pp. 739-745
  4. Tokura, I., Saito, H. and Kishinami, K., 1983, Study on properties and growth rate of frost layers on cold surfaces, J. Heat Transfer, Vol. 105, No. 4, pp. 895-901 https://doi.org/10.1115/1.3245679
  5. Yang, D. K. and Lee, K. S., 2004, Dimensionless correlations of frost properties on a cold plate, Int. J. Refrigeration, Vol. 27, No. 1, pp. 89-96 https://doi.org/10.1016/S0140-7007(03)00118-X
  6. Chen, H., Thomas, L. and Besant, R. W., 2000, Modeling frost characteristics on heat exchanger fins: Part I, Numerical model, ASHRAE Trans., Vol. 106, pp. 357-367
  7. Chen, H., Thomas, L. and Besant, R. W., 2000, Modeling frost characteristics on heat exchanger fins：Part II, Model validation and limitations, ASHRAE Trans., Vol. 106, pp. 368- 376
  8. Tso, C. P., Cheng, Y. C. and Lai, A. C. K., 2006, An improved model for predicting per formance of finned tube heat exchanger under frosting condition, with frost thickness variation along fin, Applied Thermal Engineering, Vol. 26, No. 1, pp. 111-120 https://doi.org/10.1016/j.applthermaleng.2005.04.009
  9. Kim, J. S., Kang, S. J. and Lee, K. S. 2008, Frost behavior on a one-dimensional fin considering heat conduction of heat exchanger fins, SAREK., Vol. 20, No. 11, pp. 727-732
  10. Kwon, J. T., Lim, H. J., Kwon, Y. C., Koyama, S., Kim, D. H. and Kondou, C., 2006, An experimental study on frosting of laminar air flow on a cold surface with local cooling, Int. J. Refrigeration, Vol. 29, No. 5, pp. 754-760 https://doi.org/10.1016/j.ijrefrig.2005.12.009
  11. Kim, J. S., Lee, K. S. and Yook, S. J., 2009, Frost behavior on a fin considering the heat conduction of heat exchanger fins, Int. J. Heat and Mass Transfer Vol. 52, No. 11-12, pp. 2581-2588 https://doi.org/10.1016/j.ijheatmasstransfer.2008.12.023
  12. An, W. J., Kim, J. S. and Lee, K. S., 2009, Characteristics of frost formation on heat exchanger fins of non-uniform temperature distribution, SAREK, Vol. 21, No. 7, pp. 373-379
  13. Lee, K. S., Jhee, S. and Yang, D. K., 2003, Prediction of the frost formation on a cold flat surface, Int. J. heat and mass transfer, Vol. 46, No. 20, pp. 3789-3796 https://doi.org/10.1016/S0017-9310(03)00195-9
  14. Kline, S. J. and McClintock, F. A., 1953, Describing uncertainties in single-sample experiments, Mechanical Engineering, Vol. 75, No. 1, pp. 3-8
  15. Incropera, F. P., Dewitt, D. P., Bergman, T. L. and Lavine, A. S., 2007, Fundamentals of Heat and Mass Transfer, 6th Ed, John Wiley and Sons, pp. 141-145
  16. Ogawa, K., Tanaka, N. and Takeshita, M., 1993, Performance improvement of plate fin and tube heat exchangers under frosting conditions, ASHRAE Trans., Vol. 99, part 1, pp. 762-774