• Density and Viscosity Correlations for Aqueous 3-Amino-1-propanol and Monoethanol Amine Mixtures 

      Karunarathne, Sumudu S.; Øi, Lars Erik (Journal article; Peer reviewed, 2019)
      Density and viscosity data and relevant correlations are essentially needed to perform mathematical modelling and simulations for the design of process equipment. Correlations that are developed to cover a range of ...
    • Design of a Medium-Scale Circulating Fluidized Bed Reactor for Chlorination of Processed Aluminum Oxide 

      Barahmand, Zahir; Aghaabbasi, Omid; Salcido, Jose Luis; Rustad, Emmy Kristine; Jayarathna, Chameera; Ratnayake, Chandana (Journal article; Peer reviewed, 2022)
      Fluidization is a well-established and widely used technology in the process industry. The production stability and the large effective contact area between the active substances, resulting in high mass and heat transfer ...
    • Detonation propagation in stratified reactant layers 

      Gaathaug, André Vagner; Bjerketvedt, Dag; Lundberg, Joachim; Vågsæther, Knut (Journal article; Peer reviewed, 2017)
      A numerical investigation of detonation propagation in stratified reactant layers is presented in this paper. It is baesed on the reactive Euler equations using a two step chemical kinetics approach. The numerical simulations ...
    • Distribution of Solids in a Fluidized Bed Operated without a Gas Distributor 

      Agu, Cornelius Emeka; Moldestad, Britt Margrethe Emilie (Journal article; Peer reviewed, 2018)
      Despite several advantages of a gas distributor, there are also some challenges in its application. Using a gas distributor increases the fluidizing gas compression cost. Due to deposition of fine particles and product of ...
    • The Effect of Impurities on γ-Alumina Chlorination in a Fluidized Bed Reactor: A CPFD Study 

      Barahmand, Zahir; Jayarathna, Chameera; Ratnayake, Chandana (Peer reviewed; Journal article, 2022)
      Alumina is one of the most widely used materials today, with a total annual production of millions of tonnes of highly pure alumina. A large portion of this is used to make metal aluminum. Apart from that, a growing amount ...
    • Effect of Superficial Gas Velocity on Bubbling Fluidized Bed Behaviour in a Biomass Gasifier 

      Agu, Cornelius Emeka; Moldestad, Britt Margrethe Emilie (Journal article; Peer reviewed, 2019)
      This study investigates the behaviour of bubbling fluidized beds in biomass gasification processes based on the variation of superficial gas velocity at different temperatures and air flowrates. In the paper, the operating ...
    • Euler-Granular Approach for Modelling of Dilute Phase Pneumatic Conveying in a Vertical Pipe 

      Welahettige, Prasanna Kumara Welahetti; Ariyaratne, W. K. Hiromi; Melaaen, Morten Christian (Journal article; Peer reviewed, 2017)
      In the present study, vertically upward dilute phase pneumatic conveying flow was predicted using Euler - Granular method. Three dimensional computational fluid dynamics simulations were carried out for an 8 m long and ...
    • Evaluation of Complex Spray Behaviors of Sprinkler Spray Using FDS 

      Ramachandran, Rajath; Lundberg, Joachim (Peer reviewed; Journal article, 2022)
      It takes money, time, and energy to set up an experimental grid to measure the effectiveness of fire suppression parameters. Therefore, computational fluid dynamics (CFD) is an alternative in all fields as consequences ...
    • Evaluation of drag models for CFD simulation of fluidized bed biomass gasification 

      Solli, Kjell Arne; Agu, Cornelius Emeka (Journal article; Peer reviewed, 2017)
      Gasification of biomass into suitable feedstock has become a feasible alternative technology for reducing the use of energy feedstock from fossil sources. Usually, fluidized bed technology is used in the biomass gasification ...
    • 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 ...
    • Fluidized bed calcination of cement raw meal: Laboratory experiments and CPFD simulations 

      Samani, Nastaran Ahmadpour; Jayarathna, Chameera; Tokheim, Lars-Andre (Journal article, 2020)
      The chemical and thermal processes associated with the decarbonation and fuel combustion in the cement kiln process produce a large amount of carbon dioxide (CO2) contributing with around 8 % of the global CO2 emissions. ...
    • Gasification of Biomass for Production of Syngas for Biofuel 

      Adhikari, Umesh; Eikeland, Marianne Sørflaten; Halvorsen, Britt (Journal article; Peer reviewed, 2015)
      Continuously increasing price of oil and gas, energy crisis and increased environmental consciousness towards the greenhouse gas emission have opened a new opportunity to the biomass, the oldest source of energy known to ...
    • Heat Pump Efficiencies simulated in Aspen HYSYS and Aspen Plus 

      Øi, Lars Erik; Tirados, Irene Yuste (Journal article; Peer reviewed, 2015-11-25)
      Heat pump technology provides an efficient and sustainable solution for both heating and cooling. A traditional heat pump can be defined as a mechanical-compression cycle refrigeration system powered by electricity. ...
    • Improving bench scale design for polymerisation of green CO2-polymers 

      Larsen, Thomas S.; Sætre, Kai Arne; Ronasi, Sara; Haugen, Hildegunn H.; Moldestad, Britt Margrethe Emilie (Journal article; Peer reviewed, 2018)
      Plastic has become the most common material since the beginning of the 20th century and has become almost indispensable due to its durability, light weight and low costs. However, some of the characteristics also make the ...
    • Improving bench scale pilot reactor design for polymerisation of green CO2-polymers 

      Larsen, Thomas S.; Sætre, Kai Arne; Ronasi, Sara; Haugen, Hildegunn H.; Moldestad, Britt Margrethe Emilie (Journal article; Peer reviewed, 2018)
      Plastic has become the most common material since the beginning of the 20th century and has become almost indispensable due to its durability, light weight and low costs. However, some of the characteristics also make the ...
    • Improving gas distribution and evaporation in gas cooling tower at Norcem Brevik 

      Kasin, Fredrik; Larsen, Are; Andersen, Christian; Jaiswal, Rajan; Thapa, Rajan Kumar (Peer reviewed; Journal article, 2020)
      In this work, the effect of the geometry of a GCT (Gas Cooling Tower) on the flue gas distribution in a cooling tower in Norcem, Brevik is investigated by using CPFD (Computational Particle Fluid Dynamics) modeling and ...
    • Investigation of the segregation and mixing behavior of biomass in a bubbling fluidized bed reactor using a CPFD model 

      Jaiswal, Rajan; Furuvik, Nora Cecilie Ivarsdatter; Thapa, Rajan Kumar; Moldestad, Britt Margrethe Emilie (Journal article; Peer reviewed, 2019)
      Segregation of biomass in a gasification reactor is an inevitable problem that can jeopardize the advantages such as uniform temperature control and proper mass circulation, and good solid-gas contacting area of the fluidized ...