Browsing Institutt for prosess-, energi- og miljøteknologi by Title
Now showing items 211-230 of 333
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Models for Predicting Average Bubble Diameter and Volumetric Bubble Flux in Deep Fluidized Beds
(Journal article; Peer reviewed, 2018)The average bubble diameter and volumetric bubble flux give indications about the overall bed expansion in a fluidized bed. As these properties depend on the particle properties and fluidized bed regime, their accurate ... -
Moving Bed Biofilm Process in Activated Sludge Model 1 for Reject Water Treatment
(Peer reviewed; Journal article, 2021)A moving bed biofilm (MBB) process was modelled in AQUASIM using the standard activated sludge model 1 (ASM1) as a baseline. The model was controlled against experimental data from a pilot Hybrid Vertical Anaerobic Biofilm ... -
Naturally changing reference conditions: Evidence of isostatic uplift being the main cause of changes in ecological status in a SW Norwegian fjord system
(Peer reviewed; Journal article, 2021)According to the European Water Framework Directive (WFD), restoration actions are needed if the present-day ecological quality status (EcoQS) is worse than good. However, less stringent environmental objectives may be ... -
Near Well CFD Simulation of SAGD Extra Heavy Oil Production
(Journal article; Peer reviewed, 2015-11-25)Near well computational fluid dynamic simulation for extra heavy oil production using steam assisted gravity drainage was studied with ANSYS Fluent software. Computational fluid dynamic simulation can predict the multiphase ... -
Near Well Simulation and Modelling of Oil Production From Heavy Oil Reservoirs
(Conference object; Peer reviewed, 2015-11-25)Heavy oil reservoirs cover up two third of the world's hydrocarbon reservoirs. Even though it is vast energy resource, heavy oil recovery is not considered economical due to its high viscous properties. Generally horizontal ... -
Near Well Simulation of CO2 Injection for Enhanced Oil Recovery (EOR)
(Journal article; Peer reviewed, 2015-11-25)A major challenge in oil industry is the declining oil production and the relatively low recovery rate. Estimates show that although the oil is localized and mobile, more than half of the oil is remaining in the reservoir ... -
Near Well Simulation of Extra-Heavy Oil Production Using SAGD
(Conference object; Peer reviewed, 2015-11-25)Heavy oil and bitumen represent a massive world resource more than twice the size of global reserves of light or conventional oil. In reservoirs with extra heavy oil and bitumen, thermal methods are used to reduce the oil ... -
Near-well simulation of oil production from a horizontal well with ICD and AICD completions in the Johan Sverdrup field using OLGA/ROCX
(Journal article; Peer reviewed, 2020)One of the main principles of improving oil recovery is maximizing the contact area between the well and the reservoir. To achieve this purpose especially in reservoirs with a thin oil column, long horizontal wells are ... -
Nearwell Simulation of a horizontal well in Atlanta Field in Brazil with AICV® completion using OLGA/Rocx
(Journal article; Peer reviewed, 2015-11-25)Brazil has special attention in the world oil scenario due its recent findings of oil reservoirs. Most of these reservoirs are heavy oil. The increasing energy consumption and discovery of heavy oil reservoirs require more ... -
NEQ rate based modeling of an absorption column for post combustion CO2 capturing
(Journal article; Peer reviewed, 2011-04-01)Post combustion CO2 capture via absorption into aqueous alkanolamine systems is considered to be the most mature and potential technique for CO2 removal from the power plants' exhaust gases. Modeling and simulation of such ... -
A new Approach for Scaling Up from a Small Cold to a Large Hot Bed for Biomass Conversion in a Bubbling Fluidized Bed Reactor
(Peer reviewed; Journal article, 2020)Bubbling fluidized beds are simple and attractive means of achieving efficient conversion of biomass if particle segregation and the associated effects are minimized. To improve the knowledge of fluidized bed reactor design, ... -
NMR spectroscopy applied to amine–CO2–H2O systems relevant for post-combustion CO2 capture: A review
(Journal article; Peer reviewed, 2014)Nuclear Magnetic Resonance (NMR) spectroscopy is a powerful non-invasive analytical technique for chemical analyses since direct measurements at a molecular level can be performed. In this work, a survey of NMR spectroscopy ... -
NMR-based carbamate decomposition constants of linear primary alkanolamines for CO2 capture
(Journal article; Peer reviewed, 2014)The amine carbamate related equilibrium (RNHCOO– + H2O ⇆ RNH2 + HCO3–) has been investigated with 13C NMR (Nuclear Magnetic Resonance) spectroscopy for a series of linear primary alkanolamines, and the apparent carbamate ... -
Nosé-Hoover simulations of aqueous mixtures of small alcohols
(Doctoral thesis; Peer reviewed, 1996)We have performed constant energy and constant temperature equilibrium molecular dynamics simulations of model liquids of water, methanol, and ethanol, and of the binary aqueous mixtures of the alcohols at mole fractions ... -
Numerical modeling of the calcination process in a cement kiln system
(Journal article; Peer reviewed, 2017)The calcium carbonate decomposition into calcium oxide and carbon dioxide is a key process step in a cement kiln. The reaction requires thermal energy input, and pulverized coal is the fuel typically used for this purpose ... -
Numerical study of premixed gas explosion in a 1-m channel partly filled with 18650 cell-like cylinders with experiments
(Peer reviewed; Journal article, 2022)Abused and defective Li-ion cells can cause a catastrophic failure of a Li-ion battery (LIB), leading to severe fires and explosions. In recent years, several numerical and experimental studies have been conducted on the ... -
Observability of Ischemia and the Need for Patient Specific Geometrical Models in Inverse ECG.
(Journal article; Peer reviewed, 2013-09)We have performed ECG simulations on four realistic geometries in order to quantify the effect of ischemic location in the left ventricle in terms of ST shifts in the body surface potential (BSP). Using 64 electrodes we ... -
Off-field Testing of Grid Scenarios at Medium Voltage in Flexible AC Transmission Systems involving Wind Energy
(Chapter, 2020)As a result of the geographical location of north-western Germany, the local grid operator EWE NETZ has a pioneer role with respect to the integration of renewable energy sources in existing AC transmission systems. About ... -
On Detection of Yaw and Roll Angle Information for Vehicle Oblique Crash using Hough Transform
(Chapter, 2014)When performing vehicle crash tests, it is common to capture high frame rate video (HFR) to observe the vehicle motion during the impact. Such videos contain a lot of information, especially when it comes to geometric data. ... -
On Uncertainty Analysis of the Rate Controlled Production (RCP) Model
(Peer reviewed; Journal article, 2021)Rate controlled production (RCP) model is used to simulate and investigate the performance of the oil wells which are completed by autonomous inflow control devices. In order to quantify the performance of the RCP model, ...