The calculation of the heat release rate by oxygen consumption in a controlled-atmosphere cone calorimeter
- 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.
Autor*innen: | Martin Werrel, Jan Deubel, Simone KrügerORCiD, Anja Hofmann-BöllinghausORCiD, U. Krause |
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Dokumenttyp: | Zeitschriftenartikel |
Veröffentlichungsform: | Verlagsliteratur |
Sprache: | Englisch |
Titel des übergeordneten Werkes (Englisch): | Fire and materials |
Jahr der Erstveröffentlichung: | 2014 |
Verlag: | Heyden |
Verlagsort: | London |
Jahrgang/Band: | 38 |
Ausgabe/Heft: | 2 |
Erste Seite: | 204 |
Letzte Seite: | 226 |
Freie Schlagwörter: | Cone calorimeter; Controlled-atmosphere cone calorimeter; Excess air; Heat release rate; Oxygen consumption; Vitiation and ventilation control |
DOI: | 10.1002/fam.2175 |
ISSN: | 0308-0501 |
ISSN: | 1099-1018 |
Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |
Datum der Freischaltung: | 20.02.2016 |
Referierte Publikation: | Ja |
Datum der Eintragung als referierte Publikation: | 13.03.2014 |