Recent Results From the Dispersed Liquid Agent Fire Suppressant Screen.
Recent Results From the Dispersed Liquid Agent Fire
Yang, J. C.; Prive, N. C.; Donnelly, M. K.;
Grosshandler, W. L.
Halon Options Technical Working Conference.
Proceedings. HOTWC 1999. April 27-29, 1999,
Albuquerque, NM, 95-104 pp, 1999.
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halon alternatives; fire suppression; droplets;
equipment; halons; sprays; physical properties; air
Most of the current methods for fire suppression
efficiency screening (e.g., cup burners) are designed
for evaluating gaseous fire suppression agents.
Potential uses of liquid agents as halon replacements
have been recently proposed in several applications
(e.g., shipboard machinery spaces, engine compartments
in armored vehicles). Under the auspices of the US
Department of Defense Next Generation Fire Suppression
Technology Program (NGP), the National Institute of
Standards and Technology (NIST) has been tasked to
design, construct, and demonstrate a laboratory-scale
apparatus that can perform the screening of liquid
agents in well-controlled conditions. Since the
presentation of the first-generation NIST Dispersed
Liquid Agent Fire Suppression Screen (DLAPSS) apparatus
at the Halon Options Technical Working Conference 1998,
several modifications to the apparatus have been made to
alleviate clogging in the orifice of the piezoelectric
droplet generator when fluids with dissolved solids were
used and to accommodate samples available in small
quantities. This paper describes the modifications to
the apparatus in detail and presents some recent
screening results. A test protocol is also proposed for
screening liquid agents.