Uncertainty analysis of heat release rate measurement from oxygen consumption calorimetry

Oxygen consumption calorimetry remains the most widespread method for the measurement of the heat release rate from experimental fire tests. In a first step, this paper examines by theoretical analysis the uncertainty associated with this measurement, especially when CO and soot corrections are appl...

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Bibliographic Details
Published in:Fire and materials 2005-11, Vol.29 (6), p.383-394
Main Author: Brohez, Sylvain
Format: Article
Language:English
Subjects:
Applied sciences
Building technical equipments
Buildings
Buildings. Public works
CO correction
Exact sciences and technology
Fire behavior of materials and structures
Fire protection
heat release rate
oxygen consumption calorimetry
soot correction
uncertainty analysis
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Summary:Oxygen consumption calorimetry remains the most widespread method for the measurement of the heat release rate from experimental fire tests. In a first step, this paper examines by theoretical analysis the uncertainty associated with this measurement, especially when CO and soot corrections are applied. Application of theoretical equations is presented for chlorobenzene which leads to high values of CO and soot yields. It appears that the uncertainty of CO and soot corrections are high when the fuel composition is unknown. In a second step, a theoretical analysis is provided when the simplest measurement procedure is used for oxygen consumption calorimetry. The overall uncertainty can be dominated either by the uncertainty associated with the oxygen concentration, the assumed heat of combustion, the fumes mass flow rate or the assumed combustion expansion factor depending on the oxygen depletion. Copyright © 2005 John Wiley & Sons, Ltd.
ISSN:0308-0501
1099-1018
DOI:10.1002/fam.895