Browsing HVL Open by Author "Hagen, Bjarne Christian"

Now showing items 1-8 of 8

    • Behaviour of smoldering fires during periodic refilling of wood pellets into silos 

      Fernandez Anez, Maria de Las Nieves; Meyer, Anita Katharina; Elio, Javier; Kleppe, Gisle Yngvar Romslo; Hagen, Bjarne Christian; Frette, Vidar (Peer reviewed; Journal article, 2021)
      The evolution of smoldering fires in biomass stored in lab-scale silos with additional fuel material supplied repeatedly, has been studied. The direct effects of the added material on the sample are: cooling, enhanced ...

    • Early detection of smoldering in silos: Organic material emissions as precursors 

      Bluvshtein, Nir; Villacorta, Edmundo; Li, Chunlin; Hagen, Bjarne Christian; Frette, Vidar; Rudich, Yinon (Peer reviewed; Journal article, 2020)
      The possible use of organic particle emissions as indicators of smoldering fires at low temperatures (early stages, <150 °C) is explored in laboratory experiments. Samples consisting of wood pellets were heated under ...

    • Extinguishing smoldering fires in wood pellets with water cooling- an experimental study 

      Mikalsen, Ragni Fjellgaard; Hagen, Bjarne Christian; Steen-Hansen, Anne; Krause, Ulrich; Frette, Vidar (Peer reviewed, 2018-11)
      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 ...

    • From smoldering to flaming fire: Different modes of transition 

      Hagen, Bjarne Christian; Meyer, Anita Katharina (Journal article; Peer reviewed, 2021)
      Transition from smoldering to flaming fire in cotton is investigated experimentally for five different sample sizes. Two different modes of transition are identified: early and late transition. Early transition to flaming ...

    • GAP-analyse for boliger for beboere med rus- og psykiatrilidelser (ROP) 

      Hagen, Bjarne Christian (HVL-rapport;15/2020, Report, 2020)
      Denne rapporten er utarbeidet som en del forskningsprosjektet: Utvikling av nye boligtilbud tilpasset ROP-beboere med lav boevne med vekt på bruker-medvirkning (NFR 310100 - IPOFFENTLIG19). Funnene i rapporten viser at ...

    • Lip Height Effects in Quadrangular Steel Containers 

      Kolstad, Einar Arthur; Frette, Vidar; Hagen, Bjarne Christian (Chapter, 2019)
      The reduction in the mass-loss rate as a function of lip height is investigated through 90 experiments with hydrocarbon pool fires in quadrangular containers of size 10 cm, 20 cm, and 30 cm. The results show a reduction ...

    • Lip-height effect in diffusive pool fires 

      Kolstad, Einar Arthur; Hagen, Bjarne Christian; Frette, Vidar; Krause, Ulrich (Peer reviewed; Journal article, 2021)
      A freeboard, lip height, from the container rim to the fuel surface affects the mass-loss rate of a pool fire. Experiments where heptane was burned in circular containers with diameter 10, 20 and 30 cm have been conducted. ...

    • Onset of smoldering fires in storage silos: Susceptibility to design, scenario, and material parameters 

      Villacorta, Edmundo; Haraldseid, Ingunn; Mikalsen, Ragni Fjellgaard; Hagen, Bjarne Christian; Erland, Sveinung; Kleppe, Gisle Yngvar Romslo; Krause, Ulrich; Frette, Vidar (Peer reviewed; Journal article, 2021)
      Biomass fuels in large storage units are prone to self-heating and ignition causing smoldering fires. Here, the susceptibility of such ignition processes to parameters is explored through small-scale experiments. In a silo ...