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Effect of Flash Gas Bypass on the Performance of R134a Mobile Air-Conditioning System with Microchannel Evaporator

Journal Article
ISSN: 1946-3979, e-ISSN: 1946-3987
Published April 12, 2011 by SAE International in United States
Effect of Flash Gas Bypass on the Performance of R134a Mobile Air-Conditioning System with Microchannel Evaporator
Citation: Tuo, H., Bielskus, A., and Hrnjak, P., "Effect of Flash Gas Bypass on the Performance of R134a Mobile Air-Conditioning System with Microchannel Evaporator," SAE Int. J. Mater. Manuf. 4(1):231-239, 2011,
Language: English


  1. Chisolm, D. Wanniarachchi, A. Maldistribution in single-pass mixed channel plate heat exchanger ASME HTD Compact Heat Exchangers for Power and Process Industries 20 95 99 1992
  2. Kim, S. Choi, E. Cho, Y. The effect of header shapes on the flow distributions in a manifold for electronic packaging applications International Communication in Heat and Mass Transfer 22 3 329 341 1995
  3. Shi, J. Qu, X. Qi, Z. Chen, J. Investigating performance of microchannel evaporators with different manifold structures International Journal of Refrigeration 34 1 292 302 2011
  4. Munoz, J. Chen, A. Part, Y.K. et al. Heat exchangers having baffled manifolds U.S. Patent No 2010020635 A1 2010
  5. Jiang, J. Lu, X. Huang, L. Refrigerant distributor for heat exchanger U.S. Patent No 20100242535 A1 2010
  6. Hrnjak, P.S. Developing adiabatic two-phase flow in headers - distribution issue in parallel flow microchannel heat exchangers Heat Transfer Engineering 25 3 61 68 2004
  7. Fei, P. Cantrak, D. Hrnjak, P. “Refrigerant Distribution in the Inlet Header of Plate Evaporators,” SAE Technical Paper 2002-01-0948 2002 10.4271/2002-01-0948
  8. Winkler, C.M. Peters, J.E. Refrigerant droplet size measurements in conjunction with a novel method for improving flow distribution in evaporator Aerosol Science and Technology 36 6 734 741 2002
  9. Kim, N.H. Kim, D.Y. Byun, H.W. Effect of inlet configuration on the refrigerant distribution in a parallel flow minichannel heat exchanger International Journal of Refrigeration 2010
  10. Beaver, A.C. Yin, J. Bullard, C.W. Hrnjak, P.S. An experimental investigation of transcritical carbon dioxide systems for residential air-conditioning ACRC Report No. CR-18 1999
  11. Elbel, S.W. Hrnjak, P.S. Experimental and Analytical Validation of New Approaches to Improve Transcritical CO2 Environmental Control Units ACRC Report No. CR-52 2003
  12. Elbel, S.W. Hrnjak, P.S. Flash gas bypass for improving the performance of transcritical R744 systems that use microchannel evaporators International Journal of Refrigeration 27 7 724 735 2004
  13. Shikazono, N. Azuma, R. Sameshima, T. Iwata, H. Development of compact gas-liquid separator using surface tension International symposium on Next-generation Air Conditioning and Refrigeration Technology Tokyo, Japan 2010
  14. Milosevic, A. Hrnjak, P.S. Effect of using flash gas bypass on evaporator effectiveness and system efficiency when operating with low pressure refrigerants ACRC Report 234 2010
  15. McEnaney, R. Hrnjak, P. “Control Strategies for Transcritical R744 Systems,” SAE Technical Paper 2000-01-1272 2000 10.4271/2000-01-1272
  16. Li, X. Che, J. Hrnjak, P.S. Performance Improvement of an R134a Mobile A/C System by Using Internal Heat Exchangers Proceedings of the SAE 2004
  17. Bowers, C.D. Wujek, S.S. Hrnjak, P.S. Quantification of refrigerant distribution and effectiveness in microchannel heat exchangers using infrared thermography International Refrigeration and Air Conditioning Conference at Purdue 2117 2010
  18. ANSI/ASHRAE Standard 41.2-1987 (RA92) Standard methods for laboratory airflow measurement American Society of Heating, Refrigeration and Air-Conditioning Engineers 1992
  19. SAE International Surface Vehicle Standard “Procedure for Measuring System COP [Coefficient of Performance] of a Mobile Air Conditioning System on a Test Bench,” SAE Standard J2765 Oct. 2008
  20. Moffat, R.J. Decribing the uncertainties in experimental results Experimental Thermal and Fluid Science 1 1 3 17 1988
  21. Kulkarni, T. Bullard, C.W. Cho, K. Header design tradeoffs in microchannel evaporators Applied Thermal Engineering 24 5 759 776 2004
  22. Yin, J.M. Bullard, C.W. Hrnjak, P.S. Single phase pressure drop measurements in a microchannel heat exchanger Heat Transfer Engineering 23 1 1 10 2002

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