Browsing HVL Open by Author "Hagen, Bjarne Christian"

Now showing items 1-12 of 12

    • 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 ...

    • Brannsikring av personer med funksjons nedsettelser i høye bygg 

      Hagen, Bjarne Christian (HVL-rapport;2023/11, Report, 2023)
      Denne rapporten er utarbeidet som en del av forskningsprosjektet: BUILDER - Building design for At-risk groups (NFR 301569). Rapporten vil identifisere personer i risikoutsatte grupper som bor, arbeider og overnatter i ...

    • Brannsikring av personer med funksjons nedsettelser i høye bygg 

      Hagen, Bjarne Christian (HVL-rapport;2023/11, Report, 2023)
      Denne rapporten er utarbeidet som en del av forskningsprosjektet: BUILDER - Building design for At-risk groups (NFR 301569). Rapporten vil identifisere personer i risikoutsatte grupper som bor, arbeider og overnatter i ...

    • 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; Journal article, 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 ...

    • Fast moving smoldering fronts in thin liquid fuel films dispersed on inert porous media 

      Erland, Sveinung; Meyer, Runald Walter; Hagen, Bjarne Christian (Peer reviewed; Journal article, 2022)
      An experimental study of smoldering in thin layers of pyrolysis oil on an inert substrate of calcium silicate boards has been conducted. The smoldering fronts propagated with velocities up to 0.4 mm/s, which is significantly ...

    • Flame heights and charring on a particle board – An experimental study 

      Karyaparambil, Dheeraj Dilip; Erland, Sveinung; van Hees, Patrick; Frette, Vidar; Hagen, Bjarne Christian (Peer reviewed; Journal article, 2022)
      Vertically oriented particle-board samples were exposed to external venting flames to study the fire spread and charring behaviour along a timber façade. Variation in flame height and the height, volume, area, density, and ...

    • 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 ...