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EXPERIMENTAL EVALUATION OF INTERNAL HEAT EXCHANGER INFLUENCE ON R-22 WINDOW AIR CONDITIONER RETROFITTED WITH R-407C

ABSTRACT
The performance of one ton of refrigeration window air conditioner working with R-22 and retrofitted with eco friendly alternative refrigerant R-407C is experimentally investigated An internal heat exchanger is also added to the same air conditioner to provide liquid overfeeding operation. When retrofitting the R-22 system with R-407C, the coefficient of performance is found to drop by 7.28%, however when internal heat exchanger is included the performance is improved. It is observed that the inclusion of internal heat exchanger has increased the coefficient of performance by 5.86% when running on R-22 and 6.18% when running on R-407C, under the given conditions.
KEYWORDS
PAPER SUBMITTED: 2008-05-23
PAPER REVISED: 2008-09-09
PAPER ACCEPTED: 2008-10-01
DOI REFERENCE: https://doi.org/10.2298/TSCI1001039V
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2010, VOLUME 14, ISSUE 1, PAGES [39 - 47]
REFERENCES
  1. Kurylo, M. J., The Chemistry of Stratospheric Ozone: Its Response to Natural and Anthropogenic Influences, International Journal of Refrigeration, 13 (1993), 2, pp. 62-72
  2. Aprea, C., Greaco A ., Performance Evaluation of HCFC22and HFC407C in a vapor Compression Plant with Reciprocating Compressor, Applied Thermal Engineering, 23 (2003), 2, 215-227
  3. Wei, C. S, Lin, S. P., Wang, C. C., System Performance of a Split Type Unit Having HCFC22 and HFC407C as Working Fluids, ASHRAE Transactions, 10 (1997), 1, pp. 797-802
  4. Yang, Z., et al., The Performance Study of Some Substitutes for HCFC 22 Under Varying Operating Conditions, Applied Thermal Engineering, 19 (1999), 7, pp. 801-806
  5. Jabaraj, D. B., et al., Experimental Investigation of HCFC407C/HC290/HC600a Mixture in a Window Air-Conditioner, Energy Conservation Management, 47 (2006), 15-16, pp. 2578-2590
  6. Devotta, S., Padalkar, A. S., Sane, N. K., Performance Assessment of HCFC -22 Window Air-Conditioner Retrofitted with R-407C, Applied Thermal Engineering, 25 (2005), 17-18, pp. 2937-2949
  7. Dongsoo, J., Song, Y., Park, B., Performance of Alternative Refrigerant Mixtures for HCFC-22, International Journal of Refrigeration, 23 (2000), 6, pp. 466-474
  8. Devotta, S., et al., Alternatives to HCFC-22 for Air Conditioners, Applied Thermal Engineering, 21 (2001), 6, pp. 703-715
  9. Aprea, C., Ascani, M. , De Rossi, F., A Criterion for Predicting the Possible Advantage of Adopting a Suction/Liquid Heat Exchanger in Refrigerating System, Applied Thermal Engineering, 19 (1999), 4, pp. 329-336
  10. Meyer, J. P., Wood, C. W., The Design and Experimental Verification of Heat Exchanger Accumulators Used in Small Commercially Available Air Conditioning Systems, International Journal of Energy Research, 25 (2001), 10, pp. 911-925
  11. Navarro-Esbri, J., Cabello, R., Torella, E., Experimental Evaluation of the Internal Heat Exchanger Influence on a Vapor Compression Plant Energy Efficiency Working with R-22, R-134a and R-407C, Energy, 30 (2005), 5, pp. 621-636
  12. Bivens, D. B., et al., Performance of R-32/R-125/R-134a Mixtures in Systems with Accumulators or Flooded Evaporators, ASHRAE Transactions, 103 (1997), 1, pp. 777-780
  13. Yang, C., Bansal, P. K., Numerical Investigation of Capillary Tube-Suction Line Heat Exchanger Performance, Applied Thermal Engineering, 25 (2005), pp. 2014-2028
  14. Liu, Y., Bullard, C. W., Adiabatic Flow Instabilities in Capillary Tube-Suction Line Heat Exchangers, ASHRAE Transactions, 106 (2000), 1, pp. 517-523
  15. ***, Bureau of Indian Standards. Room air conditioners specification, part I: unitary air conditioners, IS1391, New Delhi, India, 1992

© 2019 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence