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Extinguishing Smoldering Fires in Wood Pellets with Water Cooling: An Experimental Study
RISE - Research Institutes of Sweden, Safety and Transport, Fire Research Norway. Western Norway University of Applied Science, Norway; Otto von Guericke University Magdeburg, Germany.ORCID iD: 0000-0003-0979-2369
Western Norway University of Applied Science, Norway.
RISE - Research Institutes of Sweden, Safety and Transport, Fire Research Norway.ORCID iD: 0000-0002-4831-7563
Otto von Guericke University Magdeburg, Germany.
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2019 (English)In: Fire technology, ISSN 0015-2684, E-ISSN 1572-8099, Vol. 25, no 1, p. 257-284Article in journal (Refereed) Published
Abstract [en]

Smoldering fires in stored or transported solid biofuels are very difficult to extinguish. The current study has explored heat extraction from the combustion zone as a method for extinguishing such flameless fires. Heat extraction from the sample was made feasible using water flowing through a metal pipe located inside the sample. The fuel container was a steel cylinder with insulated side walls, open at the top and heated from below. Wood pellets (1.25 kg, 1.8 l) was used as fuel. Results from small-scale experiments provide proof-of-concept of cooling as a new extinguishing method for smoldering fires. During self-sustained smoldering with heat production in the range 0 W to 60 W, the heat loss to the cooling unit was in the range 5 W to 20 W. There were only marginal differences between non-extinguished and extinguished cases. Up-scaling is discussed, cooling could be feasible for preventing smoldering fires in silos.

Place, publisher, year, edition, pages
2019. Vol. 25, no 1, p. 257-284
Keywords [en]
Fuel storage safety Industrial fire, Biofuels, Smoldering, Extinguishment, Fire suppression
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-36373DOI: 10.1007/s10694-018-0789-9Scopus ID: 2-s2.0-85056650077OAI: oai:DiVA.org:ri-36373DiVA, id: diva2:1266237
Available from: 2018-11-27 Created: 2018-11-27 Last updated: 2019-01-23Bibliographically approved

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Publisher's full textScopushttps://doi.org/10.1007/s10694-018-0789-9

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Fjellgaard Mikalsen, RagniSteen-Hansen, Anne

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