Experimental study on synergetic fire extinguishing performance of water mist and inert gas

doi:10.16265/j.cnki.issn1003-3033.2022.10.2237

Abstract

Abstract:

In order to improve the fire extinguishing efficiency of water mist, the fire extinguishing performance and synergistic fire extinguishing effect of water mist, inert gas nitrogen (N₂) and carbon dioxide (CO₂) were studied by experimental study and mathematical model analysis. The single and compound fire extinguishing effects of water mist and inert gas were tested by a self-designed cup burner test device, and a mathematical model of synergy factor suitable for water mist and inert gas was established. The results show that the minimum volume fractions of N₂ ethanol-extinguishing fire and heptane-extinguishing fire were 34.92% and 31.97%, respectively, and that of CO₂ ethanol-extinguishing fire and heptane-extinguishing fire were 24.37% and 22.15%, respectively. From the perspective of synergistic effect, there is a positive synergistic fire extinguishing effect between water mist and N₂, but the synergistic fire extinguishing effect with CO₂ is not obvious, and there is no synergistic fire extinguishing effect between N₂ and CO₂.

Key words: water mist, inert gas, collaborative fire extinguishing, fire extinguishing performance, cup burner

LUO Zhenmin, WANG Xin, WANG Tao, MENG Ziqi, WANG Zijin. Experimental study on synergetic fire extinguishing performance of water mist and inert gas[J]. China Safety Science Journal, 2022, 32(10): 63-68.

Figures/Tables 8

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燃料	U/(g·L^-1)
正庚烷	0.251
乙醇	0.263

燃料	惰性气体种类	C/%
正庚烷	N₂	31.91
正庚烷	CO₂	22.15
乙醇	N₂	34.92
乙醇	CO₂	24.37