Performance Data on Cold Temperature Dispersion of CF3I.
Performance Data on Cold Temperature Dispersion of CF3I.
(106 K)
Yang, J. C.; Cleary, T. G.; Donnelly, M. K.
Halon Options Technical Working Conference.
Proceedings. HOTWC 2000. Sponsored by: University of
New Mexico, Fire Suppression Systems Assoc., Fire and
Safety Group, Great Lakes Chemical Corp., Halon
Alternative Research Corp., Hughes Associates, Inc.,
Kidde Fenwal, Inc., Kidde International, Modular
Protection, Inc., Next Generation Fire Suppression
Technology Program, Sandia National Laboratories, Summit
Environmental Corp., Inc. and 3M Specialty Materials.
May 2-4, 2000, Albuquerque, NM, 175-179 pp, 2000.
Available from:
For more information contact: Center for Global
Environmental Technologies, New Mexico Engineering
Research Institute, University of New Mexico, 901
University Blvd., SE, Albuquerque, NM 87106-4339 USA.
Telephone: 505-272-7250,
Fax: 505-272-7203. WEB:
http://nmeri.unm.edu/cget/confinfo.htm
Keywords:
halon alternatives; temperature; physical properties;
evaporation; dispersions; halons
Abstract:
Tritluoroiodomethane (CF3I) has been proposed as a
potential replacement for Halon 1301 in aircraft engine
nacelle and dry bay fire protection applications. The
potential use of CF3I in fuel tank ullage inerting has
also been considered recently. Before CF3I can be
considered as a potential drop-in replacement, several
operational issues need to be addressed or re-examined.
The proposed work is intended to examine one important
aspect related to the application of CF3I cold
temperature discharge of CF3I into a sub-zero
environment. Table 1 lists some of the physical
properties of CF3I and CF3Br. Since CF3I has a normal
boiling point of -22 deg C, the dispersion of CF3I into
air at temperatures down to -40 deg C may not be as
effective as halon 1301 which has a normal boiling point
of -57.8 deg C. Although discharge of cold CF3I (chilled
to about -40 deg C) into a compartment at ambient room
temperature has been examined at NIST, the discharge of
cold CF3I into a cold compartment has not been
performed, or at least has not been documented in open
literature. In order to assure that there is no
substantial deterioration in dispersion performance of
CF3I under cold temperature applications, discharge
tests in a simulated fire compartment at the lowest
temperatures expected in service should be conducted.
Building and Fire Research Laboratory
National Institute of Standards and Technology
Gaithersburg, MD 20899