Experimental Study on R-410A Evaporation Heat Transfer Characteristics in Shell and Plate Heat Exchanger

셀 앤 플레이트 열 교환기에서의 R-410A 증발열전달에 관한 실험적 연구

  • Published : 2005.01.01

Abstract

The evaporation heat transfer experiments are conducted with the shell and plate heat exchanger (S&PHE) without oil in the refrigerant loop using R-410A. An experimental refrigerant loop has been established to measure the evaporation heat transfer coefficient h. of R-410A in a vertical S&PHE. Two vertical counter flow channels were formed in the S&PHE by three plates haying a corrugated trapezoid shape of a $45^{\circ}C$ chevron angle. UP flow of the boiling R-410A in one channel receives heat from the hot down flow of water in the other channel The effects of the refrigerant mass flux. average heat flux. refrigerant saturation temperature and vapor qualify are explored in detail. Similar to the case of a plate heat exchanger. even at a very low Reynolds number, the flow in the S&PHE remains turbulent. The Present data shows that the evaporation heat transfer coefficients of R-410A increased with the vapor qualify. The results indicate a rise in the refrigerant mass flux caused an increase in the h.. Raising the imposed wall heat flux is found to slightly improve h., while h, is found to be lower at a higher refrigerant saturation temperature. Based on the present data. empirical correlation of the evaporation heat transfer coefficient is proposed.

Keywords

References

  1. Kerner, J., Sjogren, S. and Svensson. L., 'Where Plate Exchangers Offer Advantages Over Shell-and-Tube,' Power, Vol. 131, pp. 53-58, 1987
  2. Williams, B., 'Heat Transfer Savings on a Plate,' Heating and Air Conditioning Journal. Apt., pp. 29-31, 1996
  3. K-B Lee, M-G Seo, J-H Park and Y-S Kim, 'An Experimental Study on Pressure Drop Characteristics in Plate and Shell Heat Exchanger,' Journal of the Korean Society of Marine Engineers, Vol. 25, pp. 1220-1227, 2001
  4. K-B Lee, J-H Park, M-G Seo, H-W Lee and Y-S Kim, 'Experimental Study on R-134a Condensation Heat Transfer Charac- teristics in Plate and Shell Heat Exchanger,' Journal of the Korean Society of Marine Engineers, Vol. 27, pp. 108-115, 2003
  5. Shah, R. K. and Wanniarachchi, A. S., 'Plate Heat Exchanger Design Theory in Industry Heat Exchanger.' in J. M. Buchlin (Ed.) Lecture Series, No. 1991-04. Von Karman Institute for Fluid Dynamics, Belgium, 1992
  6. Farrell, P., Wert, K. and Webb. R., 'Heat Transfer and Friction Characteristics of Turbulent Radiator Tubes,' SAE Technical Paper series, No. 910197, 1991
  7. Sieder, E. N. and Tate, G. E., 'Heat Transfer and Pressure Drop of Liquids in Tubes,' Int. Eng. Chem..Vol. 28, pp. 1429-1435, 1936 https://doi.org/10.1021/ie50324a027
  8. Wilson, E. E., 'A Basis for Rational Design of Heat Transfer Apparatus,' Trans. ASME, Vol. 37, pp. 47-70, 1915
  9. Kline, S. J. and McClintock, F. A., 'Describing Uncertainties in Single- Sample Experiments,' Mechanical Engineering, Vol. 75, No. 1, pp. 3-12, 1953
  10. Seo, M. G., 'Heat Transfer and Pressure Drop Characteristics of the Plate and Shell Heat Exchanger,' Univ. of Pukyong, Ph.D. Thesis. 2002
  11. Yan , Y., Lio, H. and Lin, T., 'Evaporation Heat Transfer and Pressure Drop of Refrigerant R-134a in a Plate Heat Exchanger.' J . Heat Transfer, Vol. 121, pp. 118-127, 1999 https://doi.org/10.1115/1.2825924
  12. Akers, W. W., Dean, H. A. and Crosser, O., 'Condensation Heat Transfer Within Horizontal Tubes,' Chem. Eng. Prog. 54, pp. 89-90, 1958