Browsing Institutt for energi og prosessteknikk by Title
Now showing items 2544-2563 of 4152
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Modelling Approach for a Liquid-Injected Ammonia-Water Screw Compressor
(Chapter, 2021)The present work focuses on a modelling approach for a liquid-injected ammonia-water screw compressor for combined absorption-compression heat pumps (CACHP) at high-temperature operation. The CACHP system combines the ... -
Modelling CO2 - water mixture thermodynamics using various equations of state (EoSs) with emphasis on the potential of the SPUNG EoS
(Journal article; Peer reviewed, 2014)CO2–water is a very important mixture in the Carbon Capture and Storage (CCS) industry. The mixture can have a broad range of concentrations, from water as an impurity in CO2 transport to high water concentrations in ... -
Modelling CO2-water thermodynamics using SPUNG equation of state (EOS) concept with various reference fluids
(Journal article; Peer reviewed, 2014)Due to the continuous increase of CO2 emission to environment, the Carbon Capture and Storage (CCS) processes gained a very high importance in the last decades. One common CO2 impurity during various CCS processes is water. ... -
Modelling Near Surface Turbulence with Helmholtz-Onsager Vortices
(Master thesis, 2021)Vortisiteten i turbulente strømmer under en fri havoverflate fornyer konstant overflaten. Dette fenomenet er viktig å forstå fordi ruheten til overflaten bestemmer fluks av gasser fra havet til atmosfæren, og er derfor viktig ... -
Modelling of a Solenoid Injector for Internal Combustion Engines and Simulation Using the Bond Graph Methodology
(Peer reviewed; Journal article, 2023)In internal combustion engines, fuel injection timing, injection rate and pressure is optimized to ensure suitable combustion and reduce emissions. Injectors are complex systems where mechanical, electromagnetic, and fluid ... -
Modelling of Adaptive Geometry Flow Control Solutions in CFD
(Master thesis, 2012)A synthetic jet is a flow control device which injects a pulsating jet flow of high-momentum fluid into a boundary layer near the wall confining a main flow. The technique is used to prevent or delay boundary layer separation. ... -
Modelling of controlled wax deposition and loosening in oil and gas production systems
(Master thesis, 2013)A large part of worlds remaining oil and gas resources is found in harsh environments such as deep water and arctic conditions. The development of such oil and gas fields requires advanced process and transport solutions. ... -
Modelling of Controlled Wax Deposition in Oil Dominated Subsea Production Systems
(Master thesis, 2016)The Arctic region is one of the remaining unexplored areas where large discoveries of petroleum still can be made. Large portions of the world's remaining worldwide undiscovered conventional hydrocarbon resources are ... -
Modelling of Crystallization During Freeze-Concentration of Hydrolysates
(Chapter, 2022)Dewatering of fish protein hydrolysates is energy intensive process. The freeze concentration is one of the solutions, which provide high quality of concentrate, energy efficiency and sustainability of the hydrolysate ... -
Modelling of energy storage using phase-change materials (PCM materials)
(Master thesis, 2013)Unfortunately the global conventional fuels in reserves are running out while the world energy consumption is increasing very fast. All scientists agreed that Renewable energies is one of the best solutions for energy ... -
Modelling of Ground Source Systems for Heat Pump Operations
(Master thesis, 2017)This thesis concerns the regional hydraulic and thermal interference between well doublets of ground source heat pump systems. The thesis falls into three parts of which the first focus on theoretical review of operating ... -
Modelling of Mercury (Hg) Distribution in a Natural Gas Processing Plant
(Master thesis, 2014)SummaryMercury (Hg) is a toxic chemical element, commonly known as quicksilver and hydrargyrum. Found in all hydrocarbon mixtures, mercury has been recorded in natural gas and oil fields all over the world. Generally ... -
Modelling of Multistream LNG Heat Exchangers
(Master thesis, 2011)The main goal of this thesis is to find out if a liquefied natural gas multistream heat exchanger numerical model is achievable. This should include several features usually neglected in nowadays available heat exchanger ... -
Modelling of reacting multi-phase flow for biomass gasification
(Doctoral theses at NTNU;2020:103, Doctoral thesis, 2020)Entrained flow gasification of pulverized biomass is considered as one of the potential technology routes to produce syngas, which later can be used to produce second generation of biofuels via Fisher-Tropsch (FT) synthesis. ... -
Modelling of Rotating Turbulent Flows: Computer simulation of turbulent backward-facing step flow with system rotation
(Master thesis, 2011)An investigation of how different levels of turbulence modelling tackle the effects of system rotation has been performed. Ranging from simple one-equation models to large-eddy simulations, different approaches have been ... -
Modelling of turbulence and combustion for simulation of gas explosions in complex geometries
(Dr. ingeniøravhandling, 0809-103X; 1998:120, Doctoral thesis, 1998)This thesis analyses and presents new models for modelling of turbulent reactive flows for CFD simulation of gas explosions in complex geometries like offshore modules. The most important aspects determining the course ... -
Modelling of Turbulent Flows with Strong Dispersed Phase-Continuous Fluid Interactions
(Doktoravhandlinger ved NTNU, 1503-8181; 2014:8, Doctoral thesis, 2014)Dispersed gas-liquid flows are common in nature and industrial applications. They can be found in systems such as gas-stirred metallurgical ladles, subsea gas releases and pneumatic oil barriers. Basic conservation equations ... -
Modelling planar film boiling of arbitrary inclination with the lubrication approximation
(Chapter, 2017)A model for inclined planar film boiling using the lubrication approximation is derived. A dimensionless form of this model is presented, and it is shown that for a given plane orientation, the dynamics of the film thickness ... -
Modelling the environmental benefit of a lifetime extension on a laptop to facilitate pro-environmental behaviour
(Master thesis, 2016)Consumption of household goods is one of the main drivers behind several environmental impacts, including emission of greenhouse gases. Lifetime extension has been proposed as a strategy to mitigate emissions. Keeping ... -
Modelltester av Peltonturbiner ved Vannkraftlaboratoriet
(Master thesis, 2011)Ved design av nye turbiner kan modelltester gjennomføres for å kartlegge driftsområde og ytelse. Informasjon fra testene kan benyttes til å avdekke eventuelle feil og estimere levetid. Modelltester kan videre benyttes til ...