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Refrigerant Flammability: A New Application of the Opposed-Flow Burner.

pdf icon Refrigerant Flammability: A New Application of the Opposed-Flow Burner. (355 K)
Womeldorf, C. A.; Grosshandler, W. L.; King, M. D.

Combustion Institute/Eastern States Section. Chemical and Physical Processes in Combustion. Proceedings. Fall Technical Meeting. December 9-11, 1996, Hilton Head, SC, Westmoreland, P. R.; Smooke, M. D., Editor(s)(s), 257-260 pp, 1996.


refrigerants; combustion; counter flow burner; difluoromethane; flammability limits; flammability tests; reaction kinetics


Due to concerns about the impact of cholorofluorocarbons (CFCs) on stratospheric ozone, new refrigerants are being evaluated by the air-conditioning and refrigerant industry to identify environmentally friendly replacements. These alternative refrigerants are primarily hydrofluorocarbons (HFCs) and hydrochlorofluorocarbons (HCFCs); some of which, because of the additional hydrogen atoms, are flammable. In order to maintain the current building code requirement of non-flammable refrigerants, optimized mixtures which maximize efficiency while minimizing risk are desired. Current methods of measuring flammability of weakly flammable refrigerants have a large uncertainty and produce results which require operator interpretation. This work presents an alternative approach with reduced uncertainty and less subjectivity.