Nye registreringer

  • Parameter estimation and analysis for grey-box models of building thermal behavior 

    Brastein, Ole Magnus Hamre (Doctoral thesis, 2020-10-12)
    Reduction of anthropogenic CO2 emissions is one of the most important scientific endeavours of our time. Space heating of buildings is responsible for a considerable portion of the worlds total energy consumption. The ...
  • Physicochemical data for amine based CO2 capture process 

    Karunarathne, Sumudu S. (Doctoral dissertations at the University of South-Eastern Norway;72, Doctoral thesis, 2020-06-18)
    Amine based post-combustion carbon capture is a highly discussed CO2 removal method from flue gas. Large-scale CO2 capture facilities with effective solvents are required to make a significant impact on reducing CO2 emissions ...
  • Data Driven Models for Estimation of Drilling Fluid Rheological Properties and Flow Rate 

    Jondahl, Morten Hansen (Doctoral dissertations at the University of South-Eastern Norway;65, Doctoral thesis, 2020-05-11)
    Pressure control during well drilling operations includes management of the well pressure above the formation pore pressure and below the formation fracture pressure. If these boundaries are not kept, an influx of formation ...
  • Human Behaviour Modelling for Welfare Technology 

    Sánchez, Veralia Gabriela (Doctoral dissertations at the University of South-Eastern Norway;63, Doctoral thesis, 2020-03-31)
    Elderly populations are increasing in Norway, Scandinavia and other developed countries, in part because people are living longer due to medical advances. This is associated with several societal challenges, including an ...
  • Electrochemical Unit Integration with Biogas Production Processes 

    Nelabhotla, Anirudh Bhanu Teja (Doctoral dissertations at the University of South-Eastern Norway;62, Doctoral thesis, 2020-03-27)
    Power to Gas (PtG) is being viewed as systemic innovation in terms of integrating renewable electricity systems and wastewater treatment systems to provide renewable transport fuel. The highly varied nature of the sun and ...
  • Modeling for Automatic Control and Estimation of Influx and Loss During Drilling Operations 

    Berg, Christian (Doctoral dissertations at the University of South-Eastern Norway;61, Doctoral thesis, 2020-03-20)
    In the modern energy driven world, oil and gas will be important resources, at least in the foreseeable future. Wells with challenging pressure windows are more com-monly drilled, and in recent years the drop in oil prices ...
  • On Process Simulation and Learning Technologies 

    Marcano Canelones, Laura Andreína (Doctoral dissertations at the University of South-Eastern Norway;45, Doctoral thesis, 2019-10-16)
    This thesis provides additional insights into the field of simulator training. Al-though numerous studies have identified how to improve simulator technologies and team training practices, little analytic attention has ...
  • Models and Estimators for Flow of Topside Drilling Fluid 

    Jinasena, Asanthi (Doctoral dissertations at the University of South-Eastern Norway;44, Doctoral thesis, 2019-10-08)
    The reduction of risk and non-productive time in oil drilling is a key research interest in the oil and gas industry. The early detection of kick and loss is a crucial part in safe well control operations, thus, it plays ...
  • 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 ...
  • 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 ...
  • Bubbling Fluidized Bed Behaviour for Biomass Gasification 

    Agu, Cornelius Emeka (Doctoral dissertations at the University of South-Eastern Norway;35, Doctoral thesis, 2019-06-21)
    The need to cut down the high dependency on the fossil fuels requires sustainable alternative energy resources. Aside that the stock of fossil fuels is depreciable, the energy source also accounts for the major contribution ...
  • Dynamics and model analysis of hydropower systems 

    Vytvytskyi, Liubomyr (Doctoral dissertations at the University of South-Eastern Norway;37, Doctoral thesis, 2019-09-06)
    Globalization and growth in energy consumption in combination with climate challenges, make the use of sustainable energy production a necessity. Important sustainable energy sources (solar, wind) are intermittent in ...
  • Biological hydrogen sulfide removal with nitrate 

    Sposob, Michal (Doctoral dissertations at the University of South-Eastern Norway;11, Doctoral thesis, 2018-09-28)
    Aim: Hydrogen sulfide is a major occupational hazard in agriculture, industry, and sewage processing; its presence leads to corrosion. Thus, hydrogen sulfide removal is obligatory. These investigations aim to evaluate the ...
  • Process analytical technology for real-time quantitative speciation of aqueous phase CO2 capture solvents 

    Jinadasa, Wathsala (Doctoral dissertations at the University of South-Eastern Norway;31, Doctoral thesis, 2019-04-08)
    Dependency on fossil fuel energy systems is unavoidable until there is a complete shift to alternative energy systems which have no/less impact for global warming. Rapid deployment of carbon capture and sequestration (CCS) ...
  • 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. ...
  • Experimental and theoretical studies of rapid phase transitions in CO2 

    Hansen, Per Morten (Doctoral dissertations at the University of South-Eastern Norway;13, Doctoral thesis, 2018-10-19)
    Rapid depressurization and evaporation of a pressurized liquefied gas are phenomena of relevance to hazard identification and risk analysis in the process industry. Tank explosions and pipeline ruptures are accident scenarios ...
  • Carbon Dioxide Capture by Chemical Absorption: Energy Optimization and Analysis of Dynamic Viscosity of Solvents 

    Arachchige, Udara Sampath P. (Doctoral dissertations at the University of South-Eastern Norway;26, Doctoral thesis, 2019-02-11)
    Global warming resulted from the emissions of greenhouse gases; especially carbon dioxide has received widespread attention. The concentration of CO2 in the atmosphere reaches 400 ppmv and that is a considerably high value ...
  • One-step Conversion of Ethylene to Propylene by a NiSO₄-ReO x/γ-A1₂O₃ Catalyst 

    Li, Lu (Doctoral dissertations at the University College of Southeast Norway;4, Doctoral thesis, 2016-06-22)
    The demand for propylene has dramatically increased due to the discovery of propylene’s derivatives (e.g. polypropylene). The propylene production from the conventional processes (steam cracking process and a refinery fluid ...
  • Modeling, Control and Optimization of a Hydropower Plant 

    Zhou, Wenjing (Doctoral dissertations at the University College of Southeast Norway;33, Doctoral thesis, 2017-12-19)
    Hydropower is a crucial power resource for everyday life in Norway, and a traditional industry that could be improved along with new updated technologies. The PhD work focuses on exploring new solutions, in aspect of ...
  • Low temperature methanol synthesis catalysed by a copper nanoparticle-alkoxide system 

    Ahoba-Sam, Christian (Doctoral dissertations at the University of South-Eastern Norway;6, Doctoral thesis, 2018-06-28)
    Methanol (MeOH) synthesis at low temperature in a liquid medium presents the possibility of achieving full syngas conversion per pass. The Low temperature MeOH synthesis (LTMS) process is advantageous over the current ...

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