Extinguishing Smoldering Fires in Wood Pellets with Water Cooling: An Experimental Study
| Autor: | Ragni Fjellgaard Mikalsen, Ulrich Krause, Bjarne Christian Hagen, Anne Steen-Hansen, Vidar Frette |
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| Rok vydání: | 2018 |
| Předmět: |
040101 forestry
Waste management Pellets Heat losses 020101 civil engineering 04 agricultural and veterinary sciences 02 engineering and technology Combustion 0201 civil engineering Steel cylinder Biofuel Water cooling 0401 agriculture forestry and fisheries Environmental science General Materials Science Extraction (military) Current (fluid) Safety Risk Reliability and Quality |
| Zdroj: | Fire Technology. 55:257-284 |
| ISSN: | 1572-8099 0015-2684 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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