Quantitative Difference in the Extinguishing Concentration of Inert Gases with Fire Suppression Criteria in a Cup Burner Test

Abstract

Quantitative differences in the extinguishing concentration with fire suppression criteria (i.e. blow-out or onset of flame instability) were also examined. It was found that the difference in extinguishing concentration was increased with the appearance of lifted flame and the low extinguishing performance of inert gaseous. The maximum difference in extinguishing concentration with the suppression criteria was approximately 35% at the highest fuel velocity condition (1.3 cm/s) for the C 3 H 8 -air nonpremixed flame. It can be also expected that the extinguishing concentration by the criteria based on the onset of flame instability will provide the useful information from the viewpoint of the accurate and economical design concentration.

Study on the Minimum Fire-Extinguishing Concentration of Several Commonly Used Extinguishing Agents to Suppress Pyrolysis Gas of Red Pine Wood

“…As can be seen from the figure, the mean CH 4 -N 2 extinguishing concentration obtained in this paper was 25.45% and the mean CH 4 -CO 2 extinguishing concentration was 15.51%. The experimental results are in good agreement with the fire-extinguishing concentrations reported in previous literature, where they differ from the experimental values of Cho et al by 1.9% (25.5%) and 3.4% (15%), respectively; from the experimental values of Takahashi et al by 1.7% (25.9%) and 1.2% (15.7%), respectively; and from the experimental values of Saito et al for CO 2 . The difference was 2.5% (15.9%).…”