The calculation of the heat release rate by oxygen consumption in a controlled-atmosphere cone calorimeter
Article first published online: 3 JAN 2013
Copyright © 2012 John Wiley & Sons, Ltd.
How to Cite
Werrel, M., Deubel, J. H., Krüger, S., Hofmann, A. and Krause, U. (2013), The calculation of the heat release rate by oxygen consumption in a controlled-atmosphere cone calorimeter. Fire Mater.. doi: 10.1002/fam.2175
- Article first published online: 3 JAN 2013
- Manuscript Accepted: 20 NOV 2012
- Manuscript Revised: 12 NOV 2012
- Manuscript Received: 16 APR 2012
- controlled-atmosphere cone calorimeter;
- heat release rate;
- oxygen consumption;
- cone calorimeter;
- vitiation and ventilation control;
- excess air
The standard cone calorimeter according to ASTM E 1354 and ISO 5660 enables reaction-to-fire tests to be performed in ambient atmospheric conditions. A controlled-atmosphere chamber modifies the standard apparatus in a way that allows tests to be performed in nonambient conditions as well. The enclosed chamber is placed underneath the standard exhaust hood and does not have a closed connection to the hood. With this open arrangement, the exhaust gases are diluted by excess air drawn in from the laboratory surroundings. Heat-induced changes in the consequential dilution ratio affect the calculation of fire quantities and, when neglected, lead to deviations of up to 30% in heat release rate. The paper introduces a test protocol and equations to calculate the heat release rate taking dilution effects into account. A mathematical correction is shown that compensates for the dilution effects while avoiding extensive mechanical changes in the equipment. Copyright © 2012 John Wiley & Sons, Ltd.