Evaporation Pressure Drop Characteristics with R-22 in the Plate and Shell Heat Exchangers

  • Park, Jae-Hong (Department of Refrigeration Engineering, Graduate School of Pukyong National University) ;
  • Seo, Moo-Gyo (Samsung Electronics Co., LTD, Airconditioner R&D) ;
  • Lee, Ki-Baik (Department of Automative Fabrication, Changwon Polytechnic College) ;
  • Kim, Young-Soo (Department of Refrigeration Engineering, Graduate School of Pukyong National University)
  • Published : 2002.09.01


In this study, evaporation pressure drop experiments were conducted with two types of plate and shell heat exchangers (P&SHE) using R-22. An experimental refrigerant loop has been established to measure the evaporation pressure drop of R-22 in a vertical P&SHE. The flow channels were formed by stacking three plates having a corrugated channel of a chevron angle of 45 dog. The R-22 flows down in one channel exchanging heat with the hot water flowing up in the other channel. The effect of the refrigerant mass flux, average heat flux, system pressure and vapor quality were explored in detail. During the experiment, the quality change between the inlet and outlet of the refrigerant channel ranges from 0.03 to 0.15. The present data showed that two types of P&SHE have similar trends. The pressure drop in-creases with the vapor quality for both types of P&SHE. At a higher mass flux, the Pressure drop is higher for the entire range of the vapor quality. Also, the increase in the average heat flux increases the pressure drop. Finally, at a higher system pressure, the pressure drop is found to be slightly lower compared to the lower system pressure.



  1. Williams, B., 1996, Heat Transfer Savings on a Plate, Heating and Air Conditioning Journal. Apt., pp.29-31
  2. Kerner, J. Sjogren, S. and Svensson, L., 1987, Where Plate Exchangers Offer Ad-vantages Over Shell-and-Tube, Power, Vol. 131, pp. 53-58
  3. Seo, M. K and Kim, Y. S., 1999, Experi-mental Study on Heat Transfer and Pres-sure Drop Characteristics for Single-Phase Flow in Plate and Shell Heat Exchangers, Korean Journal of Air-Conditioning and Re-frigeration Engineering, Vol. 12, No.4. pp. 422-429
  4. Focke, W. W., Zachariades, J and Oliver, I.,1985, The Effect of the Corrugation Incli-nation Angle on the Thermohydraulic Per-formance of Plate Heat Exchangers, Int. J. Heat Mass Transfer, Vol. 28, No.8, pp.1469-1479
  5. Cooper, A. and Usher, J. D., 1983, Heat Ex-changer Design Handbook, Chap. 3.7, Hemi-sphere Publishing, New York
  6. Bounpane, R. A. and Troupe, R. A., 1987, A Study of the Effects of Internal Rib and Channel Geometry in Rectangular Channels, AIChE Journal, Vol. 15, NO,4, pp.585-596
  7. Bogaert, R. and Boles, A., 1995, Global Per-formance of a Prototype Brazed Plate Heat Exchanger in a Large Reynolds Number Range, Experimental Heat Transfer, Taylor & Francis, No.8, pp.293-311
  8. Shah, R. K and Focke, W. W., 1988, Plate Heat Exchangers and Their Design Theory, in Shah, R. K, Subbarao, E. C., Mashelkar, R. A. (Eds.), Heat Transfer Equipment Design, Hemisphere, Washington, DC, pp.227-254
  9. Kandlikar, S. G. and Shah, R. K, 1989, Multi pass Plate Heat Exchangers Effectiveness-NTU Results and Guidelines for Selecting Pass Arrangements, ASME J. Heat Trans-fer, Vol. III, pp.300-313
  10. Shah, R. K and Wanniarachchi, A. S., 1992, Plate Heat Exchanger Design Theory in In-dustry Heat Exchanger, in J M. Buchlin(Ed.), Lecture Series, No. 1991-04, Von Kar-man Institute for Fluid Dynamics, Belgium
  11. Collier, J. G., 1982, Convective Boiling and Condensation, 2nd ed., McGraw-Hill
  12. Yi-Yie Yan, Hsiang-Chao Lio and Tsing-Fa Lin, 1999, Evaporation Heat Transfer and Pressure Drop of Refrigerant R-134a in a Plate Heat Exchanger, Transactions of the ASME, J. Heat Transfer, Vol. 121, pp.118-127
  13. Akers, W. W., Dean, H. A. and Crosser, O., 1958, Condensation Heat Transfer Within Horizontal Tubes, Chem. Eng. Prog. 54, pp. 89-90
  14. Nae Hyun Kim and Jin Pyo Cho, 1999, Ex-perimental Investigation of R-22 Conden-sation in Tubes with Small Inner Diameter, Journal of Air-Conditioning and Refrigeration, Vol. 7, pp. 45-54