- Author
-
Saso, Y.
|
Saito, N.
|
Chihong, L.
|
Ogawa, Y.
|
Inoue, Y.
- Title
- Evaluation of Fire Suppression Efficiency of Fire Extinguishing Agents Using Counterflow Diffusion Flame - Flame Extinguishing Concentrations of Halon Replacements.
- Coporate
- Koatsu Co., Ltd., Japan
- Journal
-
Report of Fire Research Institute of Japan,
No. 79,
50-55,
1995
- Keywords
-
halon alternatives
|
evaluation
|
fire suppression
|
fire extinguishing agents
|
diffusion flames
|
extinguishing
|
chemical equilibrium
- Abstract
- [ABSTRACT IN ENGLISH] The flame extinguishing concentrations of Halon 1301 and three kinds of halon replacements were measured using counterflow diffusion flames of n-heptane and ethanol. The order of increasing flame extinguishing conenctration was Halon 1301, FC-3-1-10, HFC-227ea, and HFC-23, in the range of the oxidizer flow velocities (U) examined. At U=0.3m/s, the counterflow diffusion burner system gave the flame extinguishing concentrations of halon replacements approximately equal to those obtained by the cup-burner method. But the U values, at which the flame extinguishing concentrations were equal to those measured by the cup-burner, changed from 0.2m/s to 0.5m/s with the kind of the fuel or the suppressant. The calculations of the adiabatic flame temperatures and the chemical equilibrium compositions were made for ethanol/air/Halon 1301 and ethanol/air/HFC-23 mixtures. The results indicate that the dominant factor of the flame extinction with HFC is dilution of the flame by hydrogen fluoride which is produced by decomposition of HFC in the flame.