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Recent Results From the Dispersed Liquid Agent Fire Suppressant Screen.

pdf icon Recent Results From the Dispersed Liquid Agent Fire Suppressant Screen. (751 K)
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 velocity


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.