Browsing Institutt for energi og prosessteknikk by Title
Now showing items 3819-3838 of 4173
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Thermodynamic models to accurately describe the PVTxy-behavior of water / carbon dioxide mixtures
(Journal article; Peer reviewed, 2017)Carbon dioxide/water (CO2/H2O) mixtures are of much interest in carbon capture and storage, atmospheric science, in the description of human lungs and in the processing of food and beverages. We present a comprehensive ... -
Thermodynamic performance indicators in offshore oil and gas processes
(Master thesis, 2021)With the environmental awareness increasing in recent decades and the imminent prospect of carbon neutrality more attention has been paid to the ways in which the greenhouse gas emissions and the energy demand of industrial ... -
Thermodynamic Performance Investigation of Commercial R744 Booster Refrigeration Plants Based on Advanced Exergy Analysis
(Journal article; Peer reviewed, 2019)After the recent renewed interest in CO2 as the refrigerant (R744) for the food retail industry, many researchers have focused on the performance enhancement of the basic transcritical R744 supermarket refrigeration unit ... -
Thermodynamic properties of the 3D Lennard-Jones/spline model
(Peer reviewed; Journal article, 2019)In the Lennard-Jones spline (LJ/s) model, the Lennard-Jones (LJ) potential is truncated and splined so that both the pair potential and the force continuously approach zero at rc ≈ 1.74σ. It exhibits the same structural ... -
Thermophoresis and its effect on particle impaction on a cylinder for low and moderate Reynolds numbers
(Peer reviewed; Journal article, 2021)The effect of thermophoresis on the impaction of particles on a cylinder is investigated for different particle sizes, particle conductivities, temperature gradients and for Reynolds numbers between 100 and 1600. This is ... -
Thin-layer modeling in heat pump drying of green peas
(Master thesis, 2015)The current drying of heat sensitive materials is mostly done by conventional vacuum freeze drying. The major challenges are a long residence time, a low drying capacity and high energy use. An innovative drying process ... -
Three dimensional surface gravity waves of a broad bandwidth on deep water
(Journal article, 2021)A new nonlinear Schrödinger equation (NLSE) is presented for ocean surface waves. Earlier derivations of NLSEs that describe the evolution of deep-water waves have been limited to a narrow bandwidth, for which the bound ... -
Three-dimensional hierarchical walnut kernel shape conducting polymer as water soluble binder for lithium-ion battery
(Journal article; Peer reviewed, 2018)Hierarchical nanostructures containing three-dimensional (3D) spheres are promising materials due to their unique physicochemical characteristics. In this study, a 3D hierarchical walnut kernel shape conducting polymer ... -
Three-dimensional Linear Eddy Modeling of a Turbulent Lifted Hydrogen Jet Flame in a Vitiated Co-flow
(Journal article; Peer reviewed, 2018)A new methodology for modeling and simulation of reactive flows is reported in which a 3D formulation of the Linear Eddy Model (LEM3D) is used as a post-processing tool for an initial RANS simulation. In this hybrid approach, ... -
Three-Dimensional Measurement of Azimuthally Forced Flames in an Annular Combustor
(Doctoral theses at NTNU;2023:56, Doctoral thesis, 2023)This thesis aims to better understand thermoacoustic instabilities in annular combustors. Thermoacoustic instabilities are a topic of interest since it is a challenge to operate gas turbines in a lean regime that reduces ... -
Three-dimensional thermo-coupled modelling of Lithium-ion batteries
(Master thesis, 2022)Med økende interesse for å oppnå bedre ytelse av batterier for å kunne levere nødvendig energilagring for energiomstillingen, har mange potensielle forskningsområder dukket opp. En av dem er forbedring av katodeytelse ... -
Three-dimensional wake measurements
(Master thesis, 2010)The performance of a hot wire probe with three wires is investigated for two different flow cases. The wires are made of a platinum/rhodium alloy, and has a diameter of 5 micrometer. The three wires make a probe volume ... -
Thrust gas bearing analytical tool development
(Master thesis, 2014)Looking for a cheaper and low maintenance alternative to magnetic bearings, Statoil patented a new design for thrust gas bearings with honeycomb/hole-patterned surface. Honeycomb/hole-pattern surface on annular seals have ... -
Tidligfase vekt og kost estimering av offshore prosessutstyr
(Master thesis, 2015)The purpose of this work is to establish the basis of a methodology for quantifying process equipment, as a response to the different parameters which influence process design. Defining the process facility is one of the ... -
Tilpasning av LNG-prosess og -system til arktisk klima
(Master thesis, 2010)LNG-produksjon i arktisk klima åpner for høy prosesseffektivitet, men prosessen og utstyret må tilpasses en slik operasjon. Kraftproduksjonssystemet vil i tillegg dra fordel av lave temperaturer, men også her vil det være ... -
Tilrettelegging for deltakelse i et fleksibilitetsmarked
(Bachelor thesis, 2020)Det norske kraftnettet står i dag ovenfor utfordringer som økende elektrisitetsbehov, uregulerbar fornybar energiproduksjon, endringer i forbruksmønster og desentralisert energiproduksjon. Smartby-prosjektet +CityxChange, ... -
Tilstandsanalyse av vindturbiner ved bruk av SCADA data
(Bachelor thesis, 2023)Vindenergi er og fortsetter å være en essensiell del av kraftproduksjon globalt sett, og derfor er det viktig å redusere nedetid og vedlikeholdskostnader i vindparker. Kunnskap om årsakene til feil i en vind turbin hjelper ... -
Time evolution of uniform moment zones in a turbulent boundary layer
(Journal article; Peer reviewed, 2018)Time-resolved planar particle image velocimetry (PIV) was used to analyse the structuring of a turbulent boundary layer into uniform momentum zones (UMZs). The instantaneous peak detection method employed by Adrian et al. ... -
Time to rethink trophic levels in aquaculture policy
(Peer reviewed; Journal article, 2021)Aquaculture policy often promotes production of low-trophic level species for sustainable industry growth. Yet, the application of the trophic level concept to aquaculture is complex, and its value for assessing sustainability ... -
Time-dependent boundary conditions for multiphase flow
(Doktoravhandlinger ved NTNU, 1503-8181, Doctoral thesis, 2004)In this thesis a set of boundary conditions for multiphase flow is suggested. Characteristic-based boundary conditions are reviewed for single-phase flow. The problem of open-boundary conditions is investigated, and to ...