Fire Suppression Substitutes and Alternatives to Halon for U.S. Navy Applications (1997) / Chapter Skim
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APPENDIX D: WATER MIST FIRE SUPPRESSION TECHNOLOGY
APPENDIX D: WATER MIST FIRE SUPPRESSION TECHNOLOGY
Pages 85-95
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From page 85... ...
The potential efficacy of water mist fire suppression systems has been demonstrated in numerous studies and in a wide range of applications, including Class B spray and tool fire sl 2 3 4 -~ ~ =~~~ ~ -as ~ 536 ~ 1 ~ machinery and engine room spaces, ~ 9 ~0 i,l2 shipboard accommodation spaces,) ' and computer and electronics applications.
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From page 86... ...
This is of course analogous to the lack of a theoretical basis for nozzle design for total flooding gaseous systems, and/or even conventional sprinkler and water spray systems. Extensive experimental and theoretical work aimed at predicting critical adiabatic flame temperatures appears to indicate a range between 1600 to 1900 K, depending on the fuel.
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From page 87... ...
Commercial Water Mist Fire Suppression Systems At least 11 water mist system technologies are currently available or under development using either dual-fluid (N2/air and water) or single-fluid high-pressure systems.
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From page 88... ...
EXPERIMENTAL EVALUATION OF WATER MIST SYSTEMS The efficacy of water mist fire suppression systems recently has been demonstrated tirough experimental programs for a range of applications, including the following: Class B spray and fool fires;25 26 27 28 Aircraft cabins;29 31 · Shipboard machinery and engine room spaces;32 33 34 35 36 37 · Shipboard accommodation spaces;38 and · Computer and electronics applications.39 40 In addition, Factory Mutual Research Corporation has developed a performance-based approval standard for water mist applications for turbine generator enclosures and machinery spaces. The following sections partially summarize water mist system testing in applications similar to those for the U.S.
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From page 89... ...
The droplet size distribution can be varied across a wide range by changing the relative water and air flow rates, air pressure, and nozzle orifice design. Several of these types of systems are commercially available.
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From page 90... ...
remained operating during this test. Naval Research Laboratory' Machinery Space Testing The NRL conducted several series of full-scare tests aboard the ex-USS Shac~well, a damage control and fire-fighting test vessel located in Mobile Bay, Alabama.
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From page 91... ...
National Research Council of Canada Mawhinney48 developed engineering design criteria for machinery space water mist fire suppression systems based on Canadian Navy experiments conducted at the National Fire Laboratory in Canada. Key characteristics of such systems include drop size distribution, spray flux, and spray momentum, among others.
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From page 92... ...
CURRENT STATUS OF WATER MIST SYSTEMS The efficacy of water mist fire suppression systems as an alternative to halon 1301 or other total flooding gases in naval and marine flammable and combustible liquid hazard areas, including machinery spaces, has been demonstrated. Water mist has a particular advantage over gases due to the substantial environmental and hot-surface cooling that occurs.
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From page 93... ...
Mex., May 11-13 (1993~; V Gameiro, "Fine Water Spray Fire Suppression Alternative to Halon 1301 in Machinery Spaces," The 1993 International CFC and Halon Alternatives Conference Proceedings, Washington, D.C., October 20-22 (1993~.
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From page 94... ...
Mex., May 11-13 (1993~; and V Gameiro, "Fine Water Spray Fire Suppression Alternative to Halon 1301 in Machinery Spaces," The 1993 International CFC and Halon Alternatives Conference Proceedings, Washington, D.C., October 20-22 (1993~.
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From page 95... ...
Mex., May 11-13 (1993~; V Gameiro, "Fine Water Spray Fire Suppression Alternative to Halon 1301 in Machinery Spaces," The 1993 International CFC and Halon Alternatives Conference Proceedings, Washington, D.C., October 20-22 (1993~.
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