Mosl or the current methods for fire suppression efficiency screening (e.2.. 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 (cy., shipboard machinery spaces, engine compartments in armored vehicles). Under the auspices of the US Department of Defense Next Generation Fire Suppression Technology Program (NCPj, the National Institute of Standards and Technology (NIST) has been tasked to design. construct, and demonstrate a laboratory-scale apparatus that can perform thc screening of liquid agents in well-controlled conditions. Since the presentation of the tirst-generation NlST dispersed liquid _agent fire suppression ere en (DLAFSS) apparatus at the Halon Options Technical Working Conference 1998 [ 11, several modifications to the apparatus have heen made to alleviate clogging in the orifice of thc piezoelectric droplet generator when fluids with dissolved solids were used and to acconimodatc samples available in small quantities. This paper describes the modifications 10 the apparatus in detail and presents some recent screening results. A test protocol is also proposed for screening liquid a- elits.
Citation: Special Publication (NIST SP) - 984-4Report Number:
NIST Pub Series: Special Publication (NIST SP)
Pub Type: NIST Pubs