Examination of the extinguishment performance of a water mist system using continuous and cycling discharges

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DOIResolve DOI: http://doi.org/10.1023/A:1015453014065
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TypeArticle
Journal titleFire Technology
Volume35
IssueNovember 4
Pages336361; # of pages: 26
SubjectWater mist
AbstractA series of full-scale fire tests of a twin-fluid water mist system was conducted in an empty enclosure and in a simulated machinery space. During the tests, two water mist discharge modes (continuous and cycling) were used. The extinguishment performance of the water mist system using these two discharge modes was investigated under various fire scenarios, including different fire sizes, types and locations, and different ventilation conditions. The test results showed that the use of the cycling discharge substantially improved the effectiveness of the water mist system for fire suppression, in comparison to the continuous discharge. The corresponding extinguishing time and water requirement for fire suppression were significantly reduced, and some fires that could not be extinguished by the use of the continuous discharge were extinguished by the use of the cycling discharge. The improvement in fire suppression was attributed to high depletion and dilution rate of oxygen and the recurrent dynamic mixing generated by the cycling water mist discharge in the compartment.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number41870
8094
NPARC number20331650
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Record identifier4887d6f9-6b67-4de3-aa57-3d0c66d836c3
Record created2012-07-18
Record modified2016-05-09
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