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Retrofitting R-12 car air conditioner with R-134a refrigerant

2000; Wiley; Volume: 24; Issue: 6 Linguagem: Inglês

10.1002/(sici)1099-114x(200005)24

1099-114X

Omar M. Al‐Rabghi, Abdulkareem A. Niyaz,

Heat Transfer and Boiling Studies

International Journal of Energy ResearchVolume 24, Issue 6 p. 467-474 Research Article Retrofitting R-12 car air conditioner with R-134a refrigerant Omar M. Al-Rabghi, Corresponding Author Omar M. Al-Rabghi Thermal Engineering Department, King Abdulaziz University, P.O. Box 9027, Jeddah, Saudi ArabiaThermal Engineering Department, King Abdulaziz University, P.O. Box 9027, Jeddah, Saudi ArabiaSearch for more papers by this authorAbdulkareem A. Niyaz, Abdulkareem A. Niyaz Thermal Engineering Department, King Abdulaziz University, P.O. Box 9027, Jeddah, Saudi ArabiaSearch for more papers by this author Omar M. Al-Rabghi, Corresponding Author Omar M. Al-Rabghi Thermal Engineering Department, King Abdulaziz University, P.O. Box 9027, Jeddah, Saudi ArabiaThermal Engineering Department, King Abdulaziz University, P.O. Box 9027, Jeddah, Saudi ArabiaSearch for more papers by this authorAbdulkareem A. Niyaz, Abdulkareem A. Niyaz Thermal Engineering Department, King Abdulaziz University, P.O. Box 9027, Jeddah, Saudi ArabiaSearch for more papers by this author First published: 25 April 2000 https://doi.org/10.1002/(SICI)1099-114X(200005)24:6 3.0.CO;2-RCitations: 11AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Abstract Refrigerant-12 which is commonly used in air conditioning is among the substances to be phased out internationally. R-134a, which is a chlorine-free refrigerant, is the industry chosen substitute for R-12. In this study, a car air conditioned by R-12 is selected. The car is fitted with appropriate sensors and gauges to measure the car AC performance. First, the performance is measured when it is running with R-12. Careful retrofitting is then made, including adjustment, changing parts, oil and R-12 to R-134a. The performance of the retrofitted AC with R-134a is then measured. Comparison between the two cases is made for different engine RPMs. The AC system was tested twice to see the effect of ambient temperature on the performance. The results of the comparison are very encouraging with better performance on the side of the R-12 case. The results were also compared with car manufacturer's recommended performance checks, and found to be satisfactory. Copyright © 2000 John Wiley & Sons, Ltd. REFERENCES Al-Rabghi OM 1996. Review and performance comparison among some R-12 candidates substitutes. Proceedings of the First UAE Conference on Air Conditioning in the Gulf, ACG'96, Al-Ain, UAE., pp. 60– 73. Anon. 1992. Proceedings of CFC's Symposium on Phasing-out of Chlorofluorocarbons, Organized by Chamber of Commerce & Ind., East Province, Damman, Saudi Arabia. Anon. 1994. ICI Chemicals and Polymers, P.O. Box 13, The Heath, Runcorn, Cheshire WA7 4QF, England. Anon. 1995. Monroe Air Tech., Inc, R-406A Direct drop in refrigerant for R-12, 522 West second street, Bloomington, Indiana, 47403, U.S.A. Anon. 1995a. Retrofitting to HFC-134a refrigerant. Fundamentals and Installation Instruction, vol. 1. Toyota Motor Corporation: Japan. Anon. 1995b. Heater and Air Conditioning Systems. Toyota Motor Corporation, Training Manual, vol. 18, pp. 77, Japan. Anon. 1996–1998. Ozone Action News Letter, United Nations Environment Programme Industry (UNEPIE), 39-43 Quai Andre, Citroen, 75739, Paris, Cedex 15, France. Anon. 1988. Handheld Digital Doppler Flow Meter, Model HFM, Manufactured by Dynamic Fluid System Ltd., Box 103, East Aurora, N.Y. 14052, U.S.A. Anon.1989. DuPont SUVA refrigerants. HFC-134a and R-12 properties, DuPont Chemical, Wilmington, U.S.A. ASHRAE 1997. Handbook of Fundamentals. American Society of Heating, Refrigeration and Air Conditioning: Atlanta, GA. Corr S, Deklera TW, Savage AL. 1993. Retrofitting large refrigeration systems with R-134a. ASHRAE Journal, 35: 29– 33. Niyaz AA. 1997. Retrofitting Car Air Conditioning System With R-134a. Senior Project, Thermal Engineering Department, College of Engineering, King Abdulaziz University. Reynolds WC. 1979. Thermodynamic Properties in SI Graphs, Tables and Computational Equations for Forty Substances. Published by the Department of Mechanical Engineering, Stanford University: Stanford, CA, U.S.A. Citing Literature Volume24, Issue6May 2000Pages 467-474 ReferencesRelatedInformation