Browse > Article

Extinguishment of n-heptane Pool Fire by Water Mist Containing Alkali Metal Agent  

Park, Jae-Man (Department of Safety Engineering, Chungbuk National University)
Shin, Chang-Sub (Department of Safety Engineering, Chungbuk National University)
Publication Information
Journal of the Korean Society of Safety / v.20, no.3, 2005 , pp. 105-111 More about this Journal
Abstract
An experimental study is performed for extinguishing of n-heptane pool fire by water mist containing potassium acetate as a fire suppression additive. Water mist was generated by a single pressure nozzle in a small-scale chamber. The drop size distribution of water mist was measured using laser diffraction(Malvern particle sizer). The flame temperature, oxygen concentration and carbon monoxide concentration were measured. In case of using additives, the fire extinguishing time was shorter than that of pure water at a given discharge pressure and it was because the momentum of a water droplet containing additives was increased. And also dissociated metal atoms, potassium, were reacted as a scavenger of the major radical species OH, H which were generated for combustion process. Moreover, at a high pressure of 4MPa, the fire was extinguished through blowing effect as well as primary extinguishing mechanisms.
Keywords
water mist; additive; potassium acetate;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Z. Jiang, W.K. Chow, J. Tang, S.F. Li, 'Preliminary study on the suppression chemistry of water mists on poly(methyl methacrylate) flames', Polymer Degradation and Stability, Vol. 86, Issue 2, pp. 293-300, 2004   DOI   ScienceOn
2 H.K. Chelliah, A.K. Lazzarini, P.C. Wanigarathne, G.T. Linteris, 'Inhibition of premixed and nonpremixed flames with fine droplets of water and solutions', Proceedings of the Combustion Institute, Vol. 29, pp. 369-376, 2002   DOI   ScienceOn
3 A.E. Finnerty, R.L. McGill, W.A. Slack, 'Waterbased halon replacement sprays', ART-TR-1138, U.S. Army Research Lab., 1996
4 B.A. Williams, J.W. Fleming, 'Suppression mechanisms of alkali metal compounds', Halon Options Technical Working Conference, pp. 157-169, 1999
5 B. Yao, W. Fan, G. Liao, 'Interaction of water mists with a diffusion flame in a confined space', Fire Safety Journal, Vol. 33, pp. 129-139, 1999   DOI   ScienceOn
6 M.D. King, J.C. Yang, W.S. Chien, W.L. Grosshandler, 'Evaporation of a small water droplet containing an additive', Proc. of the ASME National Heat Transfer Conference, Baltimore, 1997
7 M.B. Kim, Y.J. Jang, M.O. Yoon, 'Extinction limit of a pool fire with a water mist', Fire Safety Journal, Vol. 28, pp. 295-306, 1997   DOI   ScienceOn
8 B. Downie, C. Polymeropoulos, G. Gogos, 'Interaction of a water mist with a buoyant methane diffusion flame', Fire Safety Journal, Vol. 24, pp. 359 -381, 1995   DOI   ScienceOn
9 United Nation Environmental Program(UNEP), 'Montreal Protocol on Substances that Deplete the Ozone Layer', 1987
10 A.K. Kim, 'Improvement of water mist performance with foam additives', Proceedings of Fire Suppression and Detection Research Application Symposium, pp. 439-447, 2001
11 NFPA 750 : Standard on Water Mist Fire Protection Systems. National Fire Protection Association, 2003
12 J. Richard, J. P. Garo, J. M. Souil, J. P Vantelon, V. G. Knorre, 'Chemical and physical effects of water vapor addition on diffusion flames', Fire Safety Journal, Vol. 38, pp. 569-587, 2003   DOI   ScienceOn