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Title: Flammability limits of fuel/fluorocarbon azeotropes

Abstract

Both Dehn and Thorne have intimated that flash point (FP) measurements could be used to define the gas-phase flammability limits of fire and retardant vapor mixtures above the surface of heated retardant containing flammable liquids. However, it was found that ignitable mixtures exist above the liquid surface, where the concentration of the agent in the fluid is well beyond the limiting concentrating for inerting of alcohol fires. Clearly this anomaly results from diffusion competition of air and liquid vapor mixture at the position of the ignitor, as influenced by the design of the experimental apparatus. The authors are skeptical about the need or worth of attempting to define flammability limits using FP data, especially since unknown variables control the response. More important is to define the concentration of liquid phase retardant that will affect gas phase inerting. Thus, it is necessary to continue practical testing of retardant-containing liquids for their effectiveness in mitigating possible accidents, e.g., the next phase of this work will assess the effectiveness of halocarbons to inert high-pressure alcohol/agent leaks impinging on both electrical and flame ignition sources.

Authors:
; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab., CA (USA)
OSTI Identifier:
5610196
Report Number(s):
UCRL-85463; CONF-810704-6
ON: DE82006771
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: 1. international specialists meeting of the Combustion Institute, Bordequx, France, 20 Jul 1981
Country of Publication:
United States
Language:
English
Subject:
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; 02 PETROLEUM; FUELS; FLAMMABILITY; ORGANIC FLUORINE COMPOUNDS; AZEOTROPE; COMBUSTION PROPERTIES; EXPERIMENTAL DATA; FIRES; SAFETY; DATA; INFORMATION; NUMERICAL DATA; ORGANIC COMPOUNDS; ORGANIC HALOGEN COMPOUNDS; 570000* - Health & Safety; 020600 - Petroleum- Health & Safety

Citation Formats

Alvares, N J, Hammond, P R, Foote, K, and Ford, Jr, H W. Flammability limits of fuel/fluorocarbon azeotropes. United States: N. p., 1981. Web.
Alvares, N J, Hammond, P R, Foote, K, & Ford, Jr, H W. Flammability limits of fuel/fluorocarbon azeotropes. United States.
Alvares, N J, Hammond, P R, Foote, K, and Ford, Jr, H W. 1981. "Flammability limits of fuel/fluorocarbon azeotropes". United States.
@article{osti_5610196,
title = {Flammability limits of fuel/fluorocarbon azeotropes},
author = {Alvares, N J and Hammond, P R and Foote, K and Ford, Jr, H W},
abstractNote = {Both Dehn and Thorne have intimated that flash point (FP) measurements could be used to define the gas-phase flammability limits of fire and retardant vapor mixtures above the surface of heated retardant containing flammable liquids. However, it was found that ignitable mixtures exist above the liquid surface, where the concentration of the agent in the fluid is well beyond the limiting concentrating for inerting of alcohol fires. Clearly this anomaly results from diffusion competition of air and liquid vapor mixture at the position of the ignitor, as influenced by the design of the experimental apparatus. The authors are skeptical about the need or worth of attempting to define flammability limits using FP data, especially since unknown variables control the response. More important is to define the concentration of liquid phase retardant that will affect gas phase inerting. Thus, it is necessary to continue practical testing of retardant-containing liquids for their effectiveness in mitigating possible accidents, e.g., the next phase of this work will assess the effectiveness of halocarbons to inert high-pressure alcohol/agent leaks impinging on both electrical and flame ignition sources.},
doi = {},
url = {https://www.osti.gov/biblio/5610196}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Feb 10 00:00:00 EST 1981},
month = {Tue Feb 10 00:00:00 EST 1981}
}

Conference:
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