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Extinction of Hydrofluorocarbon Flames With F/H Ratios of Unity and Greater.


pdf icon Extinction of Hydrofluorocarbon Flames With F/H Ratios of Unity and Greater. (247 K)
Grosshandler, W. L.; Donnelly, M. K.; Womeldorf, C. A.

NISTIR 6242; October 1998.

National Institute of Standards and Technology. Annual Conference on Fire Research: Book of Abstracts. November 2-5, 1998, Gaithersburg, MD, Beall, K. A., Editor(s), 57-58 pp, 1998.

Sponsor:

Department of Energy, Washington, DC

Available from:

National Technical Information Service
Order number: PB99-102519

Keywords:

fire research; fire science; fire suppression; hydrofluorocarbons; refrigerants; ozone; extinction

Abstract:

Hydrofluorocarbons (HFCs) are being considered as replacements for chlorofluorocarbon (CFC) refrigerants because HFCs do not deplete stratospheric ozone when released to the atmosphere. In general, the exchange of a halogen atom in a molecule with hydrogen decreases the atmospheric lifetime of the compound. It may also increase the efficiency of the refrigeration machine. Both of these effects are highly desirable from environmental considerations since they act to mitigate global warming; however, more hydrogen on an HFC is usually associated with an increase in flammability. An accepted method for determining the flammability limits of gaseous fuels is ASTM Standard E 681.