• 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 ...
    • Degradation of Aqueous 2-Amino-2-methyl-1-propanol for Carbon Dioxide Capture 

      Wang, Tielin (Doctoral dissertations at TUC;2013:1, Doctoral thesis; Peer reviewed, 2013-01-29)
      Absorption-stripping with aqueous 2-amino-2-methyl-1-propanol (AMP), and especially AMP blends with other amines, such as monoethanolamine (MEA) and piperazine (PZ), presents an attractive option for carbon dioxide (CO2) ...
    • Degradation of polymeric and particulate organic carbon in biofilms 

      Kommedal, Roald (Doctoral theses at NTNU;2003:101, Doctoral thesis; Peer reviewed, 2003)
      Polymeric and particulate organic carbon (POM) are fundamental compounds in the global cycling of carbon, and constitute significant amounts of BOD in municipal wastewater. The main objective of this work is to study ...
    • Dynamics and Control for Efficient Fertilizer Processes 

      Vesjolaja, Ludmila (Doctoral dissertations at the University of South-Eastern Norway;105, Doctoral thesis, 2021-10-11)
      Granulation processes have been a subject of research for more than 60 years. During these years of research, there has been a significant improvement in qualitative and quantitative knowledge of the granulation processes, ...
    • 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 ...
    • 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 ...
    • Empirical modeling, state estimation, and process control with real-life applications to the Czochralski crystallization process 

      Komperød, Magnus ((Doctoral dissertations at TUC;2012:1, Doctoral thesis; Peer reviewed, 2012-05-24)
      This PhD thesis presents research work within the field of systems and control engineering, with emphasis on applications to real-life processes, the Czochralski (CZ) crystallization process in particular. During the PhD ...
    • 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 ...
    • Experimental Study of Deflagration to Detonation Transition in Hydrogen-Air Mixtures 

      Gaathaug, André Vagner (Doctoral dissertations at TUC;2015:1, Doctoral thesis; Peer reviewed, 2015-04-29)
      Gas explosions in a square channel have been investigated with a main focus on the deflagration to detonation transition (DDT). The gas mixtures were hydrogen and air at different concentrations. This work have been motivated ...
    • Gas explosions in process pipes 

      Kristoffersen, Kjetil (Doctoral theses at NTNU;2004:79, Doctoral thesis; Peer reviewed, 2004)
      In this thesis, gas explosions inside pipes are considered. Laboratory experiments and numerical simulations are the basis of the thesis. The target of the work was to study gas explosions in pipes and to develop numer- ...
    • 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 ...
    • Hydrogen leaks in partially confined spaces - dispersion and explosions 

      Sommersel, Ole Kristian (Doctoral dissertations at the University of South-Eastern Norway;31, Doctoral thesis, 2017-12-12)
      In Porsgrunn, Norway, there was an explosion in an ammonia plant in July 1985. The accident was caused by a hydrogen leak inside a factory building, called N1. The result was a severe hydrogen-air explosion and jet fire, ...
    • Hydrogen safety in confined spaces 

      Lach, Agnieszka Weronika (Doctoral dissertations at the University of South-Eastern Norway;130, Doctoral thesis, 2022-09-02)
      Unwanted hydrogen releases in confined spaces can be significantly more dangerous compared to open-air scenarios. The transmission towards a zero-emission system results in a growth of hydrogen-driven vehicles which increases ...
    • Identification of signals describing pairwise interaction in plankton, bacteria and bacteriophage : a study of model, microcosm and lake 

      Sandvik, Gunnar (Doctoral theses at NTNU;2003:54, Doctoral thesis; Peer reviewed, 2003)
      This study concerns interaction between organisms. Such interactions are often studied through organism abundances over periods of time (time-series). Time-series reflect both internal (biological) and external (environmental) ...
    • An Image Processing Framework for High Speed Videos from Combustion and Gas Explosion Experiments 

      Maharjan, Samee (Doctoral dissertations at the University of South-Eastern Norway;83, Doctoral thesis, 2020-12-18)
      The method of high speed photography is used to visualize those phenomena which occur so fast that it is impossible to visualize by the normal human eyes. One of those phenomena is a shock wave propagation during gas ...
    • Image-based sizing techniques for fire water droplets 

      Lundberg, Joachim (Doctoral dissertations at TUC;2015:5, Doctoral thesis; Peer reviewed, 2015-11-12)
      The Norwegian petroleum industry has developed a standard for the technical safety of offshore installations (NORSOK S-001, 2008). When dimensioning accidental load with this standard, the deluge or fire water spray may ...
    • Impact erosion by solid particles in gas-particle flows 

      Ediriweera, Mahesh (Doctoral thesis, 2021-06-18)
      Mass loss of inner wall surface due to particle impact, also referred as erosive wear, is a common challenge encountered in industrial pneumatic conveying systems. Previous studies have shown that erosion is a process ...
    • Intelligent frequency control for the secure operation of modern power system 

      Acosta Montalvo, Martha Nohemi (Doctoral dissertations at the University of South-Eastern Norway;103, Doctoral thesis, 2021-09-23)
      The modern power system is experiencing several changes to meet the objective to become in a zero CO2 emissions industry. The principal changes are the high penetration of renewable energy sources (RESs) into the power ...
    • 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 ...
    • Mass transfer characteristics of CO2 absorption into liquid droplets 

      Han, Jingyi (Doctoral dissertations at TUC;2014:1, Doctoral thesis; Peer reviewed, 2014-01-21)
      CO2 capture from exhaust gases has been paid more and more attention in order to avoid global warming. One of the methods for removing CO2 from the flue gas streams is the use of absorption and aqueous alkanolamine solutions ...