Process, Energy and Automation Engineering
Recent Submissions
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On Process Simulation and Learning Technologies
(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 ... -
Transient drilling fluid flow in Venturi channels: comparing 3D and 1D models to experimental data
(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 ... -
Models and Estimators for Flow of Topside Drilling Fluid
(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 ... -
Techno-economic analysis of CO2 capture concepts
(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
(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
(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
(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
(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
(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
(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
(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
(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
(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
(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 ... -
Pneumatic conveying and storage of wet particles to illustrate offshore drill cutting handling
(Doctoral dissertations at the University of South-Eastern Norway;7, Doctoral thesis, 2018-06-29)In this thesis, the pneumatic conveying and storage characteristics of particles mixed with a drilling fluid are studied based on the pilot scale experiments. The objective of this research is to investigate the impact of ... -
Hydrogen leaks in partially confined spaces - dispersion and explosions
(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, ... -
Optimization of flow behavior in biomass gasification reactor
(Doctoral dissertations at TUC;2015:2, Doctoral thesis, 2015)Dual fluidized bed reactor for steam gasification of biomass is a promising technology and can be used in Combined Heat and Power (CHP) production. The producer gas from the reactor can have a calorific value up to 14 ... -
Image-based sizing techniques for fire water droplets
(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 ... -
Tomographic Approach to Automatic and Non-Invasive Flow Regime Identification
(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 ... -
Post combustion CO2 capture using aqueous amine solvents: Investigations on molecular structure-activity relationships for amine solvents
(Doctoral dissertations at TUC;2015:3, Doctoral thesis; Peer reviewed, 2015-06-25)The study in this dissertation focuses on chemical absorption of CO2 using aqueous amine which is expected to be the technology of choice for early large scale deployment of postcombustion carbon capture (PCC). However ...
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