Blar i Institutt for prosess-, energi- og miljøteknologi på tittel
Viser treff 5-24 av 332
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A solution method for one-dimensional shallow water equations using flux limiter centered scheme for open Venturi channels
(Journal article; Peer reviewed, 2018)The one-dimensional shallow water equations were modified for a Venturi contraction and expansion in a rectangular open channel to achieve more accurate results than with the conventional one-dimensional shallow water ... -
A Study of Mass Transfer Kinetics of Carbon Dioxide in (Monoethanolamine + Water) by Stirred Cell
(Journal article; Peer reviewed, 2013-08-05)The gas phase resistance in a stirred cell was investigated to understand and avoid its influence on the measurement of the reaction kinetics. To validate the influence of gas phase resistance and the experimental conditions ... -
A Study of the Effect of Relative Permeability and Residual Oil Saturation on Oil Recovery
(Journal article; Peer reviewed, 2015-11-25)The depletion of oil production and the low recovery rate are the major challenges faced in oil production. Several studies have shown that considerable amount of oil still remains in the reservoir after the well shutdown. ... -
Absorption and Desorption Study of Alkylamine Promoted DEEA Solvents for CO2 Capture
(Journal article; Peer reviewed, 2018)Three primary and two secondary mono-alkylamines, and a di-alkylamine (3-(Methylamino)propylamine, MAPA) were investigated in blend with a tertiary amine (2-(Diethylamino)ethanol, DEEA). The aim of the study was to ... -
Air gasification of wood chips, wood pellets and grass pellets in a bubbling fluidized bed reactor
(Peer reviewed; Journal article, 2021)Gasification is an attractive method for biomass-to-energy conversion and fluidized bed design is one of the best options for large scale operation. A bubbling fluidized bed reactor was used to analyze the effects of biomass ... -
Algorithm with improved accuracy for real-time measurement of flow rate in open channel systems
(Journal article; Peer reviewed, 2017)Most methods for flow rate measurement in open channels usually have low accuracy over a range of flow rates due to varying fluid properties, flow conditions and channel length. This paper suggests an algorithm to improve ... -
Ammonium as a Carbon-Free Electron and Proton Source in Microbial Electrosynthesis Processes
(Peer reviewed; Journal article, 2020)Biogas upgrading to biomethane with microbial electrosynthesis (MES) is receiving much attention due to increasing biomethane demands and surplus renewable energy. Research has demonstrated the feasibility of MES to increase ... -
An assessment of swinger techniques for the playground swing oscillatory motion
(Journal article; Peer reviewed, 2012)Much attention has been devoted to how playground swing amplitudes are built up by swinger techniques, i.e. body actions. However, very little attention has been given to the requirements that such swinger techniques place ... -
An experimental investigation of rapid boiling of CO2
(Journal article; Peer reviewed, 2014-09-27)Storage of pressurized liquified gases is a growing safety concern in many industries. Knowledge of the thermodynamics and kinetics involved in the rapid depressurization and evaporation of such substances is key to the ... -
An experimental study of temperatures in cloud from release of flashing liquid CO2 in 3m long channel.
(Journal article; Peer reviewed, 2014)Flashing of the liquid CO2 is an accidental hazards that may occurs in many industrial sector such as, process industries, carbon capture and storage projects, crude oil extraction process etc. Sometimes the accidental ... -
An Optimization Framework for Tracking Droplets in Fire Water Spray Images
(Conference object; Peer reviewed, 2015-11-25)The properties of the flow from fire water nozzles, like droplet size and velocity distribution within the spray, are known to influence the fire suppression efficiency. To analyze the flow properties, the water spray is ... -
Anaerobic Digestion of Hemicellulosic Sugars Implemented in ADM1
(Peer reviewed; Journal article, 2020)Lignocellulosic biomass is a sustainable and renewable source for both solids like biochar and biomethane by anaerobic digestion (AD). Hot water extraction (HWE) improves the total utilization of the biomass and produces ... -
Anaerobic digestion of pig manure supernatant at high ammonia concentrations characterized by high abundances of Methanosaeta and non-euryarchaeotal archaea
(Journal article; Peer reviewed, 2017)We examined the effect of ammonium and temperature on methane production in high rate upflow anaerobic sludge bed reactors treating pig manure supernatant. We operated four reactors at two ammonium concentrations (‘low’ ... -
Anaerobic Digestion Process Modeling Under Uncertainty: A Narrative Review
(Peer reviewed; Journal article, 2023)Growing concern about global climate change has led to considerable interest in investigating renewable energy sources such as the biological conversion of biomass to methane in an anaerobic environment. Through a series ... -
Anaerobic expanded granular sludge bed (EGSB) reactor for the removal of sulphide by autotrophic denitrification.
(Journal article; Peer reviewed, 2014)The Removal efficiency, load and N/S molar ratio, of an EGSB reactor for autotrophic sulphide denitrification operated for 96 days, were studied. The reactor was operated at high inlet sulphide concentrations between 0.25 ... -
Analysing consequences of infiltration and inflow water (I/I-water) using cost-benefit analyses
(Peer reviewed; Journal article, 2020)The Municipality of Asker (Norway) is at risk of not meeting the water quality targets set by the European Union Water Framework Directive within the stipulated timeframe. While there are multiple factors negatively impacting ... -
Analysing the effect of temperature for steam fluidized-bed gasification of biomass with MP-PIC simulation
(Journal article; Peer reviewed, 2018)Gasification in fluidized beds is an outstanding technology in biomass to energy conversion. The multiphase particle-in-cell modelling has reduced the computational time related to CFD simulations of dense gas-solid systems ... -
Analysis of the effect of steam-to-biomass ratio in fluidized bed gasification with multiphase particle-in-cell CFD Simulation
(Journal article; Peer reviewed, 2017)Biomass has been identified as a key renewable energy source to cope with upcoming environmental challenges. Gasification of biomass is becoming interested in large scale operation, especially in synthesis of liquid fuels. ... -
Analyzing the Effects of Geometrical and Particle Size Uncertainty in Circulating Fluidized Beds using CPFD Simulation
(Journal article; Peer reviewed, 2019)Computational fluid dynamic modeling and simulation is becoming a useful tool in the detailed analysis of multiphase flow systems. The level of uncertainty is different depending on selected modeling concept and numerical ... -
Analyzing the effects of particle density, size, size distribution and shape for minimum fluidization velocity with Eulerian-Lagrangian CFD simulation
(Journal article; Peer reviewed, 2017)Fluidized bed reactor systems are widely used due to excellent heat and mass transfer characteristics followed by uniform temperature distribution throughout the reactor volume. The importance of fluidized beds is further ...