Blar i NTNU Open på forfatter "Mikalsen, Ragni Fjellgaard"
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Effects of external cooling on smoldering fire in wood pellets
Snersrud, Dag Olav (Master thesis, 2021)Ulmebrann er en saktegående eksoterm reaksjon, der brensel og oksygen er konsumert for å produsere varme. Det som skiller ulmebrann fra andre forbrenningsformer, er at den brenner uten en synlig flamme. Ulmebranner er også ... -
Experimental study of smouldering in wood pellets with and without air draft
Rebaque, Virginia; Ertesvåg, Ivar Ståle; Mikalsen, Ragni Fjellgaard; Steen-Hansen, Anne (Journal article; Peer reviewed, 2020)Dry wood pellets (diameter 8 mm) of mixed Norwegian spruce and pine were tested in samples of 1.25 kg (1.7 l) in configurations with and without air draft from below. The pellets were placed in a vertical 15 cm diameter ... -
Hydrothermal synthesis of materials for intermediate band solar cells
Mikalsen, Ragni Fjellgaard (Master thesis, 2013)Solar energy is an abundant energy source that may provide an environmentallyfriendly alternative to fossil fuels. The utilization of the solar energy have so farbeen limited by various energy losses in the photovoltaic ...