Extinction of Hydrofluorocarbon Flames With F/H Ratios of Unity and Greater.
Extinction of Hydrofluorocarbon Flames With F/H Ratios
of Unity and Greater.
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
fire research; fire science; fire suppression;
hydrofluorocarbons; refrigerants; ozone; extinction
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.