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Journal of Energy in Southern Africa

On-line version ISSN 2413-3051
Print version ISSN 1021-447X

J. energy South. Afr. vol.23 n.3 Cape Town  2012


Performance of A R22 split-air-conditioner when retrofitted with ozone friendly refrigerants (R410A and R417A)



Bukola Olalekan Bolaji

Department of Mechanical Engineering, Federal University of Agriculture Abeokuta, Nigeria




R22 that has been used predominantly in air conditioning and in medium and low-temperature applications contains ozone depleting chlorine atoms and hence will be phased out eventually. This paper presents the experimental performance study of a split-air-conditioner using ozone friendly alternative refrigerants. The existing split-air-conditioner originally designed for R22 as the working fluid was retrofitted with R410A and R417A respectively, and the performance of the system was evaluated and compared with its performance when R22 was used. Experimental results showed that with R417A, the system had 1.9% higher refrigeration capacity and 14.2% lower with R410A when compared to that of R22. The average discharge pressure of the compressor obtained with R417A and R410A were 3.8% lower and 10.3% higher, respectively, than with R22. The lowest compressor power consumption and pressure ratio were obtained with the R417A retrofitted system. The average coefficient of performance (COP) obtained using R417A is 2.9% higher, while that of R410A is 8.4% lower than that of R22. Generally, with R417A the system consistently had the best performance in comparison to both R22 and R410A, indicating that R417A would be a better choice for retrofitting existing split-air-conditioners originally designed to use R22 as working fluid.

Keywords: retrofitting, split-air-conditioners, experimental, performance, R22, R410A, R417A



Full text available only in PDF format.




Aprea, C., and Greco, A., (2002). An exergetic analysis of R22 substitution. Applied Thermal Engineering 22(13): 1455-1469.         [ Links ]

ASHRAE, (1998). Refrigeration Handbook, American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Chapter 2, Inc. Atlanta (GA), ISBN 1-883413-54-0.         [ Links ]

Bitzer, (2012). Refrigerant Report. Bitzer International, 15th Edition, 71065 Sindelfingen, Germany, Accessed on March 8, 2012.         [ Links ]

Bolaji, B.O., (2005). Refrigerants and stratospheric ozone: past, present and future. In: Okoko E, Adekunle, VAJ eds. Environmental Sustainability and Conservation in Nigeria. Book of Readings of Environment Conservation and Research Team, Jubee Publisher Akure, Nigeria: 231-239.         [ Links ]

Bolaji, B.O., (2008). Investigating the performance of some environment-friendly refrigerants as alternative to R12 in vapour compression refrigeration system. PhD. Thesis in the Department of Mechanical Engineering, Federal University of Technology Akure, Nigeria.         [ Links ]

Bolaji, B.O., (2010a). Selection of Environment-Friendly Refrigerants and the Current Alternatives in Vapour Compression Refrigeration Systems. Proceedings of Multi-Disciplinary International Conference, Ghana Institute of Management and Public Administration, Ghana: 27-39.         [ Links ]

Bolaji, B.O., (2010b). Experimental Analysis of Reciprocating Compressor Performance with Eco-Friendly Refrigerants. Proc. IMechE, Part A: Journal of Power and Energy 224: 781-786.         [ Links ]

Chen, W., (2008). A comparative study on the performance and environmental characteristics of R410A and R22 residential air conditioners. Applied Thermal Engineering 28: 1-7.         [ Links ]

Devotta, S., Padalkar, A.S., and Sane, N.K., (2005). Performance assessment of R22 window air conditioner retrofitted with R407C. Applied Thermal Engineering 25: 2937-2949.         [ Links ]

Fatouh, M., Ibrahim, T.A., and Mostafa, A., (2010). Performance assessment of a direct expansion air conditioner working with R407C as an R22 alternative. Applied Thermal Engineering 30: 127-133.         [ Links ]

Han, X.H., Wang, Q., Zhu, Z.W., and Chen, G.M., (2007). Cycle performance study on R32/R125/R161 as an alternative refrigerant to R407C. Applied Thermal Engineering 27: 2559-2565.         [ Links ]

He, M., Li, T., Liu, Z., and Zhang, Y., (2005). Testing of the mixing refrigerants R152a/R125 in domestic refrigerator. Applied Thermal Engineering 25: 169-1181.         [ Links ]

Jabaraj, D.B., Avinash, P., Lal, D.M., and Renganarayan, S., (2006). Experimental investigation of HFC407C/HC290/HC600a mixture in a window air conditioner. Energy Conversion and Management 47: 2578-2590.         [ Links ]

Nicola, G.D., Giuliani, G., Polonara, FF, and Stryjek, R., (2005). Blends of carbon dioxide and HFCs as working fluids for the low-temperature circuit in cascade refrigerating systems, International Journal Refrigeration 28: 130-140.         [ Links ]

Park, K., and Jung, D., (2009). Performance of heat pumps charged with R170/R290 mixture. Applied Energy 86: 2598-2603.         [ Links ]

Park, K., Shim, Y., and Jung, D., (2008). Performance of R433A for replacing R22 used in residential air-conditioners and heat pumps Applied Energy 85: 896-900.         [ Links ]

Torrella, E., Cabello, R., Sanchez, D., Larumbe, J.A., and Llopis, R., (2010). On-site study of R22 substitution for HFC non-azeotropic blends (R417A, R422D) on a water chiller of a centralized HVAC system. Energy and Buildings 42: 1561-1566.         [ Links ]



Received 9 May 2011
Revised 19 March 2012

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