Flammability limits of fuel/fluorocarbon azeotropes
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.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5610196
- Report Number(s):
- UCRL-85463; CONF-810704-6; ON: DE82006771
- Resource Relation:
- Conference: 1. international specialists meeting of the Combustion Institute, Bordequx, France, 20 Jul 1981
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
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