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Study of Liquid Injection on Pressure Drop of Refrigerant Mixtures Inside Enhanced Surface Tubing

[+] Author Affiliations
S. M. Sami, J. Comeau

University of Moncton

Paper No. IMECE2005-82462, pp. 51-58; 8 pages
  • ASME 2005 International Mechanical Engineering Congress and Exposition
  • Process Industries
  • Orlando, Florida, USA, November 5 – 11, 2005
  • Conference Sponsors: Process Industries Division
  • ISBN: 0-7918-4227-4 | eISBN: 0-7918-3769-6
  • Copyright © 2005 by ASME


Two phase flow pressure drop characteristics observed under liquid injection during boiling of refrigerant mixtures R-404A, R407C and R507 as well as R-410A are presented in this paper. Experiments showed that liquid injection tends to decrease the pressure drop during boiling which will have positive impact in increasing the boiling heat transfer rate, heat flux and system efficiency. However, condensation data demonstrated that liquid injection increases the pressure drop. In addition, the data also reveals that the refrigerant under investigation exhibit the same behaviour at higher Reynolds numbers or mass flow rates.

Copyright © 2005 by ASME



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