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Inledande insats mot ventilationskontrollerad brand med risk för backdraft

Du Rietz, Sebastian LU and Ahlman, Linus (2012) In LUTVDG/TVBB VBRM01 20112
Division of Fire Safety Engineering
Fire Protection Engineering 3,5 years
Division of Risk Management and Societal Safety
Abstract (Swedish)
This report evaluates a first response with water against an underventilated fire with imminent risk of backdraft occurrence. The report is based on a literature review followed by 35 experiments conducted in a shipping container. A fire in a wood-based fuel was forced to become underventilated after which a hatch was opened and the outcome was studied. In some of the experiments a known amount of water was discharged before opening the hatch in order to evaluate its impact. The results are associated with some uncertainties and sources of error, resulting in a difficulty to generalize. This is due mainly to the fact that the experiments were conducted outdoors in large scale with actual firefighting equipment. The report shows that a... (More)
This report evaluates a first response with water against an underventilated fire with imminent risk of backdraft occurrence. The report is based on a literature review followed by 35 experiments conducted in a shipping container. A fire in a wood-based fuel was forced to become underventilated after which a hatch was opened and the outcome was studied. In some of the experiments a known amount of water was discharged before opening the hatch in order to evaluate its impact. The results are associated with some uncertainties and sources of error, resulting in a difficulty to generalize. This is due mainly to the fact that the experiments were conducted outdoors in large scale with actual firefighting equipment. The report shows that a first response with water is useful since it can suppress ignition of combustible gases and backdraft. In order to obtain this effect in the experiments 260 g water per m3 protected volume was required. The temperature reduction following the water discharged was quickly recovered. This indicates that smoke ignition is primarily suppressed by diluting the gas in the compartment. This finding is consistent with existing theory. (Less)
Please use this url to cite or link to this publication:
author
Du Rietz, Sebastian LU and Ahlman, Linus
supervisor
organization
alternative title
First response against underventilated fire with imminent risk of backdraft
course
VBRM01 20112
year
type
M2 - Bachelor Degree
subject
keywords
Initial firefighting attack., First response, Extinguishing with water, Smoke ignition, Under-ventilated fire, Vattens släckförmåga Ventilation-controlled fire, Inledande insats, Backdraft, Brandgasantändning, Underventilerad brand, Ventilationskontrollerad brand
publication/series
LUTVDG/TVBB
report number
5369
ISSN
1402-3504
language
Swedish
id
2518814
date added to LUP
2012-05-03 12:58:04
date last changed
2014-03-10 10:40:41
@misc{2518814,
  abstract     = {This report evaluates a first response with water against an underventilated fire with imminent risk of backdraft occurrence. The report is based on a literature review followed by 35 experiments conducted in a shipping container. A fire in a wood-based fuel was forced to become underventilated after which a hatch was opened and the outcome was studied. In some of the experiments a known amount of water was discharged before opening the hatch in order to evaluate its impact. The results are associated with some uncertainties and sources of error, resulting in a difficulty to generalize. This is due mainly to the fact that the experiments were conducted outdoors in large scale with actual firefighting equipment. The report shows that a first response with water is useful since it can suppress ignition of combustible gases and backdraft. In order to obtain this effect in the experiments 260 g water per m3 protected volume was required. The temperature reduction following the water discharged was quickly recovered. This indicates that smoke ignition is primarily suppressed by diluting the gas in the compartment. This finding is consistent with existing theory.},
  author       = {Du Rietz, Sebastian and Ahlman, Linus},
  issn         = {1402-3504},
  keyword      = {Initial firefighting attack.,First response,Extinguishing with water,Smoke ignition,Under-ventilated fire,Vattens släckförmåga Ventilation-controlled fire,Inledande insats,Backdraft,Brandgasantändning,Underventilerad brand,Ventilationskontrollerad brand},
  language     = {swe},
  note         = {Student Paper},
  series       = {LUTVDG/TVBB},
  title        = {Inledande insats mot ventilationskontrollerad brand med risk för backdraft},
  year         = {2012},
}