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Släckteknisk skillnad mellan mörkt och ljust släckpulver

Larsson, Karl-Magnus LU (2018) In LUTVDG/TVBB VBRM01 20182
Division of Fire Safety Engineering
Abstract
The purpose of the work was to investigate whether an extinguishing powder with a darker color other than white has an increased extinguishing effect when extinguishing a fire in an enclosure. In the experiments conducted, a conventional extinguishing powder was tested against a carbon black-dyed extinguishing powder with nitrogen or air as a propellant. All other variables were kept the same. To further investigate the differences in extinguishing time, air was used as propellant.
At a predetermined temperature the extinguishing powder was blown into a third-scale ISO-9705 compartment containing a heptane pool-fire burning at approximately 110 kW. All attempts were filmed and time to extinguishing was measured.
The temperature was... (More)
The purpose of the work was to investigate whether an extinguishing powder with a darker color other than white has an increased extinguishing effect when extinguishing a fire in an enclosure. In the experiments conducted, a conventional extinguishing powder was tested against a carbon black-dyed extinguishing powder with nitrogen or air as a propellant. All other variables were kept the same. To further investigate the differences in extinguishing time, air was used as propellant.
At a predetermined temperature the extinguishing powder was blown into a third-scale ISO-9705 compartment containing a heptane pool-fire burning at approximately 110 kW. All attempts were filmed and time to extinguishing was measured.
The temperature was continuously measured in the flame and in one of the corners of the room.
The results of the tests do not show any significant difference between the different extinguishing powders tested. However, the results indicate a slight statistical correlation that a colored powder seems to lead to a shorter extinguishing time than a conventional powder. In addition, the results suggest that minor differences between extinguishing times exist when air is used as propellant gas instead of nitrogen gas.
Future studies are suggested to include more similar tests to ensure the differences between the two powders. In addition, a standardized test for the measurement of extinguishing effect in actual conditions of various extinguishing media should be obtained. (Less)
Please use this url to cite or link to this publication:
author
Larsson, Karl-Magnus LU
supervisor
organization
course
VBRM01 20182
year
type
M2 - Bachelor Degree
subject
keywords
Släckpulver, Släckeffekt, ISO-9705, Pulversläckare, Extinguishing powder, Extinguishing effect, Powder extinguisher
publication/series
LUTVDG/TVBB
report number
5578
other publication id
LUTVDG/TVBB--5578--SE
language
Swedish
id
8965366
date added to LUP
2019-01-23 10:44:58
date last changed
2019-01-23 10:44:58
@misc{8965366,
  abstract     = {{The purpose of the work was to investigate whether an extinguishing powder with a darker color other than white has an increased extinguishing effect when extinguishing a fire in an enclosure. In the experiments conducted, a conventional extinguishing powder was tested against a carbon black-dyed extinguishing powder with nitrogen or air as a propellant. All other variables were kept the same. To further investigate the differences in extinguishing time, air was used as propellant.
At a predetermined temperature the extinguishing powder was blown into a third-scale ISO-9705 compartment containing a heptane pool-fire burning at approximately 110 kW. All attempts were filmed and time to extinguishing was measured. 
The temperature was continuously measured in the flame and in one of the corners of the room.
The results of the tests do not show any significant difference between the different extinguishing powders tested. However, the results indicate a slight statistical correlation that a colored powder seems to lead to a shorter extinguishing time than a conventional powder. In addition, the results suggest that minor differences between extinguishing times exist when air is used as propellant gas instead of nitrogen gas.
Future studies are suggested to include more similar tests to ensure the differences between the two powders. In addition, a standardized test for the measurement of extinguishing effect in actual conditions of various extinguishing media should be obtained.}},
  author       = {{Larsson, Karl-Magnus}},
  language     = {{swe}},
  note         = {{Student Paper}},
  series       = {{LUTVDG/TVBB}},
  title        = {{Släckteknisk skillnad mellan mörkt och ljust släckpulver}},
  year         = {{2018}},
}