Now showing items 25-44 of 75

    • 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 ...
    • Improved Multiphase Flow Performance Using AICV and its Potential Impact on Reservoir Recovery 

      Hosnaroudi, Soheila Taghavi (Doctoral dissertations at the University of South-Eastern Norway;198, Doctoral thesis, 2024-06-14)
      The global energy demand is growing, and oil and gas supply and consumption will evolve in the coming years. It is important to maintain the current oil production to meet the global energy demand. A major challenge in oil ...
    • 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 ...
    • Mass Transfer Kinetics of Carbon Dioxide into Concentrated Aqueous Solutions of Monoethanolamine 

      Ying, Jiru (Doctoral dissertations at TUC;2013:2, Doctoral thesis; Peer reviewed, 2013-02-15)
      Global warming arguments have gained more and more attention due to the new regulations of carbon dioxide (CO2) emission in the world. Monoethanolamine (MEA) has been employed as an important industrial absorbent for CO2 ...
    • Methane production from lignocellulosic residues 

      Ghimire, Nirmal (Doctoral dissertations at the University of South-Eastern Norway;93, Doctoral thesis, 2021-05-25)
      Aims: Biochar production by intermediate pyrolysis of renewable lignocellulosic biomass to replace traditional carbon material as a reducing agent and energy source in the metallurgical industries produces carbon rich waste ...
    • Model Predictive Control for Energy Systems under Uncertainty 

      Jeong, Changhun (Doctoral dissertations at the University of South-Eastern Norway;201, Doctoral thesis, 2024-06-12)
    • 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 ...
    • 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 ...
    • Modelling and simulations of bubbling fluidized bed and entrained flow biomass gasification reactors 

      Timsina, Ramesh (Doctoral dissertations at the University of South-Eastern Norway;118, Doctoral thesis, 2022-02-24)
      The world needs sustainable energy solutions to replace fossil fuels. Climate change is the defining challenge of our time. New reports from the International Energy Agency (IEA, 2021)1 have developed a roadmap for max ...
    • Modelling of ash melts in gasification of biomass 

      Furuvik, Nora Cecilie Ivarsdatter Skau (Doctoral dissertations at the University of South-Eastern Norway;120, Doctoral thesis, 2022-03-04)
      The need for advanced biofuels produced from sustainable sources is stressed, both on national and international level due to a global agreement to limit the Earth’s global warming. The major goals in the Norwegian agreement ...
    • Modelling of gas explosions 

      Vågsæther, Knut (Doctoral theses at NTNU;2010:221, Doctoral thesis; Peer reviewed, 2010-12-03)
      The content of this thesis is a study of gas explosions in complex geometries and presentation and validation of a method for simulating flame acceleration and deflagration to detonation transition. The thesis includes a ...
    • Modelling Tool for Hydropower Systems, with Analysis and Design 

      Pandey, Madhusudhan (Doctoral dissertations at the University of South-Eastern Norway;173, Doctoral thesis, 2023-10-19)
      The increased use of renewable energy sources is due to an increasing global energy need, and to counter the effects of fossil fuels on the environment. Common renewable energy sources such as solar energy and wind energy ...