• The rapid depressurization and evaporation of liquified carbon dioxide 

      Tøsse, Sindre (Doctoral dissertations at the University College of Southeast Norway;20, Doctoral thesis, 2017-06-22)
    • Real-time Optimization and Control for Oil Production under Uncertainty 

      Janatian, Nima (Doctoral dissertations at the University of South-Eastern Norway;179, Doctoral thesis, 2024-02-02)
      The practical use of model-based optimization depends significantly on the accuracy of the model in use. This is because the presence of uncertainty can introduce a mismatch between the model and the real plant, which may ...
    • Removal of CO2 from exhaust gas 

      Øi, Lars Erik (Doctoral dissertations at TUC;2012:2, Doctoral thesis; Peer reviewed, 2012-05-30)
      Removal of CO2 from exhaust gas (CO2 capture) has become a very important topic the last years. There is international agreement to limit the emissions of greenhouse gases to reduce the global warming problem, and CO2 is ...
    • Roll-out of model based control with application to paper machines 

      Hauge, Tor Anders (Doctoral theses at NTNU;2003:31, Doctoral thesis; Peer reviewed, 2003)
      A mechanistic nonlinear model of the wet end of paper machine 6 (PM6) at Norske Skog Saugbrugs, Norway has been developed, and used in an MPC application. The MPC provides reduced variability in many key variables, and ...
    • Sensor Data Fusion based Modelling of Drilling Fluid Return Flow through Open Channels 

      Chhantyal, Khim (Doctoral dissertations at the University of South-Eastern Norway;10, Doctoral thesis, 2018-09-20)
      In drilling oil & gas wells, pressure control is essential for several reasons, but pri-marily for safety. The wellbore pressure should be maintained within the pressure window to avoid the kick and fluid loss while drilling. ...
    • Simulation and parameter optimization of fluidized-bed and biomass gasification 

      Bandara, Janitha (Doctoral dissertations at the University of South-Eastern Norway;92, Doctoral thesis, 2021-04-27)
      This thesis gives an insight to experimental studies and computational particle fluid dynamic (CPFD) simulations of fluidized bed and fluidized bed gasification reactors. CPFD models were validated against experimental ...
    • State Estimation and Optimal Control of an Industrial Copper Electrowinning 

      Perera, Magamage Anushka Sampath (Doctoral dissertations at the University College of Southeast Norway;6, Doctoral thesis, 2016)
      This dissertation contains a solution for an industrial large-scale complex control problem. There are several challenges to be faced when handling control problems. One such challenge is to be able to handle the system’s ...
    • Statistical estimation of loads from gas explosions 

      Høiset, Stian (Doctoral theses at NTNU;1998:23, Doctoral thesis; Peer reviewed, 1998)
      In the design of structures in the offshore and process industries, the possibility of a gas explosion must always be considered. This is usually incorporated by performing explosion simulations. However, estimations based ...
    • A study of premixed combustion of gas vented from failed Li-ion batteries 

      Henriksen, Mathias (Doctoral dissertations at the University of South-Eastern Norway;109, Doctoral thesis, 2021-11-25)
      As the world moves towards more clean and suitable energy sources such as wind and solar, there is an increasing demand for energy storage systems. Lithium-ion batteries (LIBs) are today the leading electrical energy storage ...
    • Syngas Fermentation and Microbial Electrosynthesis Process Integration to Advance Biogas Production 

      Sivalingam, Vasan (Doctoral dissertations at the University of South-Eastern Norway;131, Doctoral thesis, 2022-09-09)
      Norway is implementing several CO2 emissions control measures to become a low-emission society by 2050. As a part of this great vision, it strives to be the first nation to end the sales of fossil-fuelled vehicles by 2025. ...
    • Techno-economic analysis of CO2 capture concepts 

      Ali, Hassan (Doctoral dissertations at the University of South-Eastern Norway;42, Doctoral thesis, 2019-10-03)
      The estimates of post combustion CO2 capture costs reported in the literature ranges typically from 50 €/tCO2 to 130 €/tCO2, reflecting differences in the cost estimation methods used, scopes of the analyses, and assumptions ...
    • The impact of staged combustion on the operation of a precalciner cement kiln 

      Tokheim, Lars-André (Doctoral theses at NTNU;1999:89, Doctoral thesis; Peer reviewed, 1999)
      In this thesis, the impact of staged combustion on the operation of a precalciner cement kiln, is considered. Mathematical modelling and full-scale experiments at the Norcem cement works in Brevik, Norway, is the basis for ...
    • Tomographic Approach to Automatic and Non-Invasive Flow Regime Identification 

      Pradeep, Chaminda (Doctoral dissertations at TUC;2015:4, Doctoral thesis; Peer reviewed, 2015-08-28)
      This thesis mainly presents the use of process tomography to study and measure flow parameters in two phase horizontal and near horizontal flows. All static measurements were made using a horizontal separator section while ...
    • Topics in open and closed loop subspace system identification : finite data-based methods 

      Nilsen, Geir Werner (Doctoral theses at NTNU;2005:228, Doctoral thesis; Peer reviewed, 2006)
      When subspace identification methods for finite closed loop data sets are presented they are often compared to poor subspace identification methods. The methods presented in this thesis are always compared to the results ...
    • Transient drilling fluid flow in Venturi channels: comparing 3D and 1D models to experimental data 

      Welahettige, Prasanna Kumara Welahetti (Doctoral dissertations at the University of South-Eastern Norway;41, Doctoral thesis, 2019-09-26)
      In well drilling operations, bottom hole pressure control within a narrow pressure margin has a high risk of influx (kick) and outflux (loss) at greater depths. Kick occurs when the formation pressure is higher than ...