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Brandfarliga vätskor i syrereducerade miljöer

Nilsson, Carl LU and Hersner, Max LU (2021) In LUTVDG/TVBB VBRM01 20202
Division of Fire Safety Engineering
Abstract
Unmanned warehouses are increasing in number as workers are replaced by automated robotic systems. This type of facility, among others, is well suited for an oxygen reduction system for fire protection. By lowering the oxygen concentration, the risk of fire propagation is reduced and might be hindered altogether. In order to do so the limiting oxygen concentration (LOC) for the dimensioning material in the protected area needs to be known. The available literature on flammable liquids in these conditions is limited and more knowledge is needed. The goal of this work is to examine flammable liquids to hopefully provide usable information when designing an oxygen reduction system.

In this report the limiting oxygen concentration (LOC) for... (More)
Unmanned warehouses are increasing in number as workers are replaced by automated robotic systems. This type of facility, among others, is well suited for an oxygen reduction system for fire protection. By lowering the oxygen concentration, the risk of fire propagation is reduced and might be hindered altogether. In order to do so the limiting oxygen concentration (LOC) for the dimensioning material in the protected area needs to be known. The available literature on flammable liquids in these conditions is limited and more knowledge is needed. The goal of this work is to examine flammable liquids to hopefully provide usable information when designing an oxygen reduction system.

In this report the limiting oxygen concentration (LOC) for five common flammable liquids is presented. The heat release rate (HRR), mass loss rate (MLR) and CO/C02-yield for all liquids is analysed for three oxygen concentrations (21%, 17% and 15%). This is done by experiments using a cone calorimeter with a chamber that allows the atmosphere to be controlled by a set flow of air and nitrogen.

When analysing the results, it is established that the HRR and MLR do not indicate any general pattern when the oxygen concentration is lowered. For one of the liquids there is little or no impact on the HRR at lower concentrations. When establishing the LOC with external heat it is found that a higher radiation does not equal a lower LOC. (Less)
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author
Nilsson, Carl LU and Hersner, Max LU
supervisor
organization
course
VBRM01 20202
year
type
M2 - Bachelor Degree
subject
keywords
Hypoxic air, Brandfarliga vätskor, Reduced oxygen, Limiting oxygen, Cone calorimeter, Flammable liquids, ORS, LOC, CACC, Heat release rate, Mass loss rate
publication/series
LUTVDG/TVBB
report number
5636
other publication id
LUTVDG/TVBB--5636--SE
language
Swedish
id
9037114
date added to LUP
2021-01-25 12:21:57
date last changed
2021-01-26 10:34:48
@misc{9037114,
  abstract     = {{Unmanned warehouses are increasing in number as workers are replaced by automated robotic systems. This type of facility, among others, is well suited for an oxygen reduction system for fire protection. By lowering the oxygen concentration, the risk of fire propagation is reduced and might be hindered altogether. In order to do so the limiting oxygen concentration (LOC) for the dimensioning material in the protected area needs to be known. The available literature on flammable liquids in these conditions is limited and more knowledge is needed. The goal of this work is to examine flammable liquids to hopefully provide usable information when designing an oxygen reduction system.

In this report the limiting oxygen concentration (LOC) for five common flammable liquids is presented. The heat release rate (HRR), mass loss rate (MLR) and CO/C02-yield for all liquids is analysed for three oxygen concentrations (21%, 17% and 15%). This is done by experiments using a cone calorimeter with a chamber that allows the atmosphere to be controlled by a set flow of air and nitrogen. 

When analysing the results, it is established that the HRR and MLR do not indicate any general pattern when the oxygen concentration is lowered. For one of the liquids there is little or no impact on the HRR at lower concentrations. When establishing the LOC with external heat it is found that a higher radiation does not equal a lower LOC.}},
  author       = {{Nilsson, Carl and Hersner, Max}},
  language     = {{swe}},
  note         = {{Student Paper}},
  series       = {{LUTVDG/TVBB}},
  title        = {{Brandfarliga vätskor i syrereducerade miljöer}},
  year         = {{2021}},
}