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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
권호 표지

Experimental Study on the Performance Change of the Fin and Tube Type Heat Exchanger by the Frosting

착상에 의한 휜관형 열교환기의 성능변화에 관한 실험적 연구

  • Kim, Jung-Kuk (Department of Energy and Environmental Engineering, Kyushu University) ;
  • Koyama, Shigeru (Department of Energy and Environmental Engineering, Kyushu University) ;
  • Kuwahara, Ken (Department of Energy and Environmental Engineering, Kyushu University) ;
  • Park, Byung-Duck (Department of Automotive Engineering, Kyungpook National University) ;
  • Kim, Dong-Hwi (Digital Appliance Research Laboratory, LG Electronics) ;
  • Sa, Yong-Cheol (Digital Appliance Research Laboratory, LG Electronics)
  • 김정국 (큐슈대학교 환경에너지공학) ;
  • 소산번 (큐슈대학교 환경에너지공학) ;
  • 상원헌 (큐슈대학교 환경에너지공학) ;
  • 박병덕 (경북대학교 자동차공학과) ;
  • 김동휘 (LG전자 디지털어플라이언스 연구소) ;
  • 사용철 (LG전자 디지털어플라이언스 연구소)
  • Published : 2009.02.10
Download PDF
⟨ Previous Next ⟩

Abstract

The present study was investigates the effect of the parameters on the frost formation and heat transfer performance such as fin shape, air temperature and air velocity. Heat transfer rate and pressure drop by frost were experimentally investigated. Effect of the wet blub temperature and air velocity on the heat transfer performance has been also investigated. The heat transfer performance of the louver fin and tube type heat exchanger was higher by maximum of 0.85% than the corrugate fin type at the air temperature of $2.0/1.5^{\circ}C$. As the wet blub temperature of air were increased, the heat transfer rate, pressure drop and mass of frost of three test models were increased. Especially, the maximum heat transfer rate and maximum pressure drop were shown for the Type B louver fin heat exchanger. As an experimental result, the enhancement factor(EF) of louver fin and tube type heat exchanger was only $0.2{\sim}0.4$ due to the high pressure drop.

Keywords

References

  1. Cho, K. N., Kim, J. K. and Kim, M. S., 2006, Internal and external air conditioning market, Journal of SAREK, Vol. 35, No. 2, pp. 20-30
  2. Kim, M. H., 2008, The recent movements of heat exchanger development, Magazine of the SAREK, Vol. 37, No. 2, pp. 4-41
  3. IIR(Korea) and Korea Gas Corporation, 2004, The status of cooling energy and police planning in KOREA, Report of Korea Gas Corporation(KOGAS)
  4. Shin, S. H., Im, Y. B., Hayase, G., Park, S. K., Kim, J. H. and Cho, K. N., 2006, An experimental study on the performance of evaporator with plate and slit fin under frosting condition, Proceedings of the SAREK 2006 Summer Annual Conference, pp. 657-663
  5. Shimomura, N., 2006, Mechanism of frost formation and prediction of frost growth(in Japanese), Refrigeration, Vol. 81, No. 942, pp.13-17
  6. Xia Y., Zhong Y., Hrnjak P. S. and Jacobi A. M.,"Frost, defrost, and refrost and its impact on the air-side thermal hydraulic performance of louvered-fin, flat-tube heat exchangers", Int. J. of Refrigeration, Vol. 29, pp. 1066-1079, 2006 https://doi.org/10.1016/j.ijrefrig.2006.03.005
  7. O'Neal D. L. and Tree D. R., 1985, A review of frost formation in simple geometries, ASHRAE Trans. Vol. 91, No. 2, pp. 267-281
  8. Yan, W. M., Li, H. Y. and Tsay, Y. L., 2005, "Thermofluid characteristics of frosted finned-tube heat exchangers", Int. J. of Heat and Mass Transfer, Vol. 48, pp. 3073-3080 https://doi.org/10.1016/j.ijheatmasstransfer.2005.02.018
  9. Koyama, S., Kim, D. H., Kuwahara, K. and Kondo, C., 2006, An experiment on frosting phenomena in a fin bundle, International Refrigeration and Air Conditioning Conference at Purdue, CD-title
  10. Kondepui, S. N. and O'Neal, D. L., 1989, Effect of growth on the performance of louvered finned tube heat exchangers, Int. J. Refrigeration, Vol. 12, No. 3, pp. 151-158 https://doi.org/10.1016/0140-7007(89)90030-3
  11. Kim, J. K., Koyama, S., Kuwahara, K., Kim, D. H. and Park, B. D., 2008, An experimental study on the performance of the louver fin type heat exchanger by the change of the driving condition, Proceedings of the SAREK 2008 Summer Annual Conference, pp. 440-445
  12. Moffat, R. J., 1985, Using uncertainty analysis in the planning of an experiment,Trans. of the ASME : J. of Fluid Engineering, Vol. 107, pp. 173-182 https://doi.org/10.1115/1.3242452
  13. JIS-C 9612, 1999, Room air-conditioner, p. 55