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Evaluation of Fluorocarbon Blends as Automotive Air Conditioning Refrigerants
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Abstract
A search for replacements for CFC-12 in automotive air conditioning has led to the discovery of near azeotropelike ternary blends of HCFC-22, HFC-152a, and CFC-114 or HCFC-124. Ozone depletion potential is reduced to 0.42 with the blend containing CFC-U4, and to 0.03 with the blend containing HCFC-124. The blends provide automotive cooling performance slightly better than CFC-12, have good oil/refrigerant/metals stability, and will not become flammable during hose permeation or vapor leaks. Based on initial tests, the blends appear to be viable CFC-12 replacements for vehicles equipped with nylon lined refrigerant hoses, alkylbenzene oil as compressor lubricant, and possibly molecular sieve desiccant of three Angstrom pore size.
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Authors
- D. B. Bivens - E. I. du Pont de Nemours & Company, Inc., Wilmington, DE
- R. A. Gorski - E. I. du Pont de Nemours & Company, Inc., Wilmington, DE
- W. D. Wells - E. I. du Pont de Nemours & Company, Inc., Wilmington, DE
- A. Yokozeki - E. I. du Pont de Nemours & Company, Inc., Wilmington, DE
- R. A. Lindstrom - Tecumseh Products Company, Tecumseh, MI
- R. L. Shimon - Tecumseh Products Company, Tecumseh, MI
Citation
Bivens, D., Gorski, R., Wells, W., Yokozeki, A. et al., "Evaluation of Fluorocarbon Blends as Automotive Air Conditioning Refrigerants," SAE Technical Paper 890306, 1989, https://doi.org/10.4271/890306.Also In
References
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