• Evaporation characteristics during decompression of liquified CO2 from a conical-shaped vessel 

      Ibrahim, Osama Kabbashi M.; Hansen, Per Morten; Bjerketvedt, Dag; Vågsæther, Knut (Peer reviewed; Journal article, 2021)
      Safe transport of pressurized CO2 requires a profound knowledge of the processes' effect during the phase transition on catastrophic failure of a tanker filled with liquid CO2. This study presents experimental results and ...
    • Experimental and computational studies of circulating fluidized bed 

      Moradi, Ali; Samani, Nastaran Ahmadpour; Mojarrad, Masih; Sharfuddin, Mohammad; Bandara, Janitha; Moldestad, Britt Margrethe Emilie (Journal article; Peer reviewed, 2020)
      Biomass gasification represents an efficient process for the production of power, heat and biofuels. Different technologies are used for gasification and this article focuses on a circulating fluidized bed (CFB) system. ...
    • Experimental and computational studies on biomass gasification in fluidized beds 

      Basmoen, Tommy A.; Deeraksa, Chidapha; Nwosu, Chimunche F.; Qaredaghi, Ebrahim; Jaiswal, Rajan; Furuvik, Nora Cecilie Ivarsdatter; Moldestad, Britt Margrethe Emilie (Peer reviewed; Journal article, 2019)
      The world’s energy consumption is increasing, and research regarding utilization of renewable energy sources is crucial. Biomass for direct heating has been used for thousands of years, while in the last decades alternative ...
    • Experimental and Computational study of Chemical Looping Combustion 

      Thapa, Rajan Kumar; Wijeratne, D. I. Erandi N.; Moldestad, Britt Margrethe Emilie (Journal article; Peer reviewed, 2018)
      In this paper, the fluidization properties of possible oxygen carriers in Chemical Looping Combustion (CLC) have been studied. Experiments were performed in a cold fluidized bed to study fluidization properties of particles ...
    • Experimental and Computational Study of Oxygen Carriers in Chemical Looping Combustion 

      Thapa, Rajan Kumar; Wijeratne, D. I. Erandi N.; Moldestad, Britt Margrethe Emilie (Journal article; Peer reviewed, 2018)
      In this paper, the fluidization properties of possible oxygen carriers in Chemical Looping Combustion (CLC) have been studied. Experiments were performed in a cold fluidized bed to study fluidization properties of particles ...
    • Experimental and computational study on the effect of ash deposition on fluid dynamic behavior in a bubbling fluidized bed gasifier 

      Thapa, Rajan Kumar; Thapa, Saroy; Jaiswal, Rajan; Furuvik, Nora Cecilie Ivarsdatter; Moldestad, Britt Margrethe Emilie (Journal article; Peer reviewed, 2019)
      The effect of ash deposition on fluid dynamic behavior in a fluidized bed gasification reactor has been studied using experimental and computational methods. The experiments were carried out using sand particles as bed ...
    • Experimental Design and Modeling for Propylene Oxide - CO2–Poly (Propylene Carbonate) Solutions 

      Pandey, Umesh; Sætre, Kai Arne; Mathiassen, Jostein; Ronasi, Sara; Fredriksen, Siw Bodil; Pfeiffer, Carlos Fernando (Journal article; Peer reviewed, 2018)
      In this research, experimental design was used to formulate the empirical models of viscosity and density of poly(propylene carbonate) (PPC), propylene oxide (PO), and carbon dioxide (CO2) solutions by designing experiments ...
    • Experimental investigation of load exerted on a double-cone insert and effect of the insert on pressure along walls of a large-scale axisymmetrical silo 

      Ding, Songxiong; Dyrøy, A.; Karlsen, M.; Enstad, Gisle; Jecmenica, Mladen (Journal article; Peer reviewed, 2011-03-03)
      Applications of flow aid devices (commonly referred as inserts) improve the silo discharging mode. Considerable efforts have been made in finding best configurations between the inserts and silos to achieve the optimal ...
    • Experimental Study and CFD Modelling of Minimum Fluidization Velocity for Geldart A, B and D Particles 

      Amarasinghe, Widuramina Sameendranath; Jayarathna, Chameera K.; Ahangama, Bovinda S; Tokheim, Lars-André; Moldestad, Britt Margrethe Emilie (Journal article; Peer reviewed, 2017)
      The aim of this study is to determine minimum fluidization velocity of three different particles which represent different Geldart classification groups and to compare the results with computational results. The experiments ...
    • Experimental study and SEM-EDS analysis of agglomerates from gasification of biomass in fluidized beds 

      Furuvik, Nora Cecilie Ivarsdatter; Wang, Liang; Jaiswal, Rajan; Thapa, Rajan Kumar; Eikeland, Marianne Sørflaten; Moldestad, Britt Margrethe Emilie (Peer reviewed; Journal article, 2022)
      Fluidized bed gasification is an attractive conversion technology for biomass. However, processing biomass in fluidized beds suffers from ash related problems. In this work, bed agglomeration of wood pellets and grass ...
    • Experimental study of agglomeration of grass pellets in fluidized bed gasification 

      Furuvik, Nora Cecilie Ivarsdatter; Jaiswal, Rajan; Moldestad, Britt Margrethe Emilie (Chapter; Peer reviewed, 2020)
      The agglomeration tendency during gasification of grass pellets in a bubbling fluidized bed reactor was studied. Particle agglomeration occurs as a consequence of interactions between the bed particles and the biomass ash ...
    • Experimental Study of Gas Explosions in Hydrogen Sulfide-Natural Gas-Air Mixtures 

      Gaathaug, André Vagner; Bjerketvedt, Dag; Vågsæther, Knut; Nilsen, Sandra Hennie (Journal article; Peer reviewed, 2014-08-21)
      An experimental study of turbulent combustion of hydrogen sulfide (H2S) and natural gas was performed to provide reference data for verification of CFD codes and direct comparison. Hydrogen sulfide is present in most crude ...
    • Experimental study of primary atomization characteristics of sonic air-assist atomizers 

      Sikka, Raghav; Vågsæther, Knut; Bjerketvedt, Dag; Lundberg, Joachim (Journal article; Peer reviewed, 2021)
      The present study compares two twin-fluid atomizer concepts based on the airflow (shock waves) pattern obtained through shadowgraph imaging for atomization of water with a low air/water pressure supply. The research work ...
    • Experimental Study of the Initial Flame Propagation of Premixed H2-air Explosion in a Channel 

      Rai, Kanchan; Bjerketvedt, Dag; Sommersel, Ole Kristian (Conference object; Peer reviewed, 2009-07)
      This paper presents results from experiments on flame propagation in inhomogeneous and homogeneous hydrogen-air mixtures at 1 atm in a channel. The objective of the present work is to study the ininitial phase of the flame ...
    • Experimental study of thermal and catalytic pyrolysis of plastic waste components 

      Anene, Azubuike Francis; Fredriksen, Siw Bodil; Sætre, Kai Arne; Tokheim, Lars-André (Journal article; Peer reviewed, 2018)
      Thermal and catalytic pyrolysis of virgin low-density polyethylene (LDPE), high-density polyethylene (HDPE), polypropylene (PP) and mixtures of LDPE/PP were carried out in a 200 mL laboratory scale batch reactor at 460 °C ...
    • Experiments and computational particle fluid dynamics simulations of biomass gasification in an air-blown fluidized bed gasifier 

      Timsina, Ramesh; Thapa, Rajan Kumar; Moldestad, Britt Margrethe Emilie; Eikeland, Marianne Sørflaten (Journal article; Peer reviewed, 2020)
      Experiments were performed in a pilot-scale bubbling fluidized bed gasification reactor with air as a fluidizing agent. Birch wood chips and sand particles were used as biomass and bed materials. Average molar product gas ...
    • Experiments with flame propagation in a channel with one obstacle and premixed H2-air 

      Gaathaug, André Vagner; Bjerketvedt, Dag; Vågsæther, Knut (Conference object; Peer reviewed, 2009-07)
      This abstract presents experimental results of flame propagation in a square channel with a single obstacle. The background for the experimental study was to investigate how a flame propagated when and after the flame ...
    • Explosion characteristics for Li-ion battery electrolytes at elevated temperatures 

      Henriksen, Mathias; Vågsæther, Knut; Lundberg, Joachim; Forseth, Sissel; Bjerketvedt, Dag (Peer reviewed; Journal article, 2019)
      Li-ion batteries are used in electronic devices and electric cars, yet they create safety concerns due to the possibility of the release of combustible materials. The electrolyte, one of the main components in a Li-ion ...
    • Firefly optimization and mathematical modeling of a vehicle crash test based on single-mass 

      Klausen, Andreas; Tørdal, Sondre Sanden; Karimi, Hamid Reza; Robbersmyr, Kjell G; Jecmenica, Mladen; Melteig, Ole (Journal article; Peer reviewed, 2014)
      In this paper mathematical modeling of a vehicle crash test based on a single-mass is studied. The model under consideration consists of a single-mass coupled with a spring and/or a damper. The parameters for the spring ...
    • Flow behavior in an agglomerated fluidized bed gasifier 

      Furuvik, Nora Cecilie Ivarsdatter; Jaiswal, Rajan; Moldestad, Britt Margrethe Emilie (Peer reviewed; Journal article, 2019)
      The global energy demand has increased over the last decades and the need for utilization of energy produced from sustainable sources is stressed. Fluidized bed gasification of biomass is a thermochemical conversion process ...