Blar i NTNU Open på forfatter "Næss, Erling"
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A Machine Learning Approach to Correlation Development Applied to Fin-Tube Bundle Heat Exchangers
Lindqvist, Karl Erik Artur; Wilson, Zachary; Næss, Erling; Sahinidis, Nikolaos V. (Journal article; Peer reviewed, 2018)Heat exchanger designers need reliable thermal-hydraulic correlations to optimize heat exchanger designs. This work combines an adaptive sampling method with a Computational Fluid Dynamics (CFD) simulator to obtain increased ... -
A validated CFD model of plain and serrated fin-tube bundles
Lindqvist, Karl Erik Artur; Næss, Erling (Journal article; Peer reviewed, 2018)This work presents a Computational Fluid Dynamics model of helically wound fin tube bundles and demonstrates its predictive capability for thermal-hydraulic performance. A consistent validation against experimental data ... -
Active latent heat storage using biowax in a central heating system of a ZEB living lab
Sevault, Alexis; Næss, Erling (Chapter, 2020)The Zero Emission Building (ZEB) lab in Trondheim (Norway), owned by SINTEF and NTNU, provides a structure to develop and test innovative solutions in a living laboratory. An innovative latent heat storage (LHS) unit using ... -
Adsorptive Hydrogen Storage: Experimental investigations on thermal conductivity in porous media
Henriksen, Jan Georg (Master thesis, 2013)The objective of this work was to install and verify the Hot Disk TPS measurement setup for thermal conductivity measurements, and to carry out experiments on various porous materials. A literature survey on gas/solid ... -
Analyse av direkte- og indirektekjølesystemer på offshore prosess plattformer
Torp, Espen (Master thesis, 2010)In oil and gas processing industry, cooling of the oil and gas is necessary to run processes at optimal temperatures. Cooling the process flow requires large amount of big expensive equipment. The traditional way of cooling ... -
Analyse av kjølepaneler for smelteverkskomponenter
Andreassen, Jon Arthur (Master thesis, 2012)Komponenter innen smelteverksindustrien utsettes for ekstreme varmeflukser og temperaturforhold, og må derfor kjøles for å unngå nedsmelting av konstruksjonsmaterialet. I forbindelse med kjøling av overflater er det vanlig ... -
Analyse og modellering av dype energibrønner
Schwencke, Andreas B. (Master thesis, 2013)SammendragI energibrønnene installert på Skoger barneskole i Drammen, blir varme trukket ut eller injisert fra fluidet som sirkulerer i én enkel u-rør kollektor til berget rundt. Systemet består av fem 500 meter dype ... -
Analysis of a vertical flat heat pipe using potassium working fluid and a wick of compressed nickel foam
Hansen, Geir; Næss, Erling; Kristjansson, Kolbeinn Jakob (Journal article; Peer reviewed, 2016)Heat at high temperatures, in this work 400–650 °C, can be recovered by use of cooling panels/heat pipes in the walls of aluminum electrolysis cells. For this application a flat vertical heat pipe for heat transfer from a ... -
Application of mechanistic models for flow distribution and heat transfer in finned tube bundles
Eikill, Astrid Øygarden (Master thesis, 2013)The focus of this thesis was heat transfer and pressure drop in staggered tube bundles with solid and serrated fins. The first part of the work dealed with five prediction models, namely PFR's model (1976), Nir's model ... -
Aspects of Flow and Heat Transfer in Finned Tube Bundles
Ulstein, Thomas Tveit (Master thesis, 2019)Varmeovergangseksperimentet ble gjennomført i en spesialisert rigg, hvor oppvarmet luft ble brukt som en erstatning for eksosgass. Både varmeovergang og trykkfall ble undersøkt for elliptiske rør med rektangulære finner, ... -
Avsettelse av silika-partikler innen turbulent overopphetet damp
Paulse, Valdemar Emil Sørli (Master thesis, 2020) -
Beregningsprogram for varmerør
Ross Idsø, Bjarte (Master thesis, 2009)Denne rapporten beskriver utviklingen av et beregningsprogram for den termisk-hydrauliske oppførselen til et varmerør. Programmet har spesielt blitt utviklet for å kunne håndtere alkalimetaller som arbeidsmedium. Konseptet ... -
Calculation of Particle Resuspension Using Static and Dynamic Particle Models
Fadnes, Fredrik Skaug (Master thesis, 2011)The aim of this master work was to investigate particle resuspension from fouled heatexchanger surfaces. In metallurgical industries, the waste gas may contain dust and particles which can deposit on the heat exchanger ... -
Cold storage using phase change material in refrigerated display cabinets: experimental investigation
Jokiel, Michael; Sevault, Alexis; Banasiak, Krzysztof; Næss, Erling (Chapter, 2021)Refrigerated display cabinets are the main energy consumers in supermarkets. Cold thermal energy storage (CTES) using phase change materials (PCM) can significantly reduce temperature variations in a display cabinet during ... -
Computational Fluid Dynamics Modeling of Flow and Heat Transfer i Fin-Tube Bundles
Lindqvist, Karl (Doctoral theses at NTNU;2019:18, Doctoral thesis, 2019)Steam bottoming cycles, powered by gas turbine exhaust heat, are considered for offshore applications as a means of increasing the energy efficiency of power supply and reducing CO2 emissions from oil and gas production. ... -
Computer Code for Thermal Analysis of Rocket Motors
Riise, Jørn Arnold Kvistad (Master thesis, 2008)Further development of a two-dimensional thermal analysis code (G2DHeat) to include internal decomposition and charring ablation of insulation materials is presented. An overview of the structural changes made to the program ... -
Cooling of high power density electric machines
Anvik, Oscar (Master thesis, 2022)Luftfartsindustrien bidrar med omtrent 4-5% av total drivhusgassutslipp. En overgang til elektriske fremdriftsmetoder kan bidra til å redusere utslipp, men gir flere utfordringer rundt termisk adferd. I denne oppgaven ble ... -
Dampening of wood batch combustion heat release using a phase change material heat storage: Material selection and heat storage property optimization
Kristjansson, Kolbeinn Jakob; Næss, Erling; Skreiberg, Øyvind (Journal article; Peer reviewed, 2016)The use of wood stoves for space heating in energy effective residential buildings can be problematic due to the batch combustion giving a highly transient heat production and the limited regulation of the combustion ... -
Design av en PCM-basert varmelagrinsenhet for ZEB Flexible Laboratory
Bøhmer, Fabian (Master thesis, 2019) -
Development of a thermal conductivity apparatus: Analysis and design
Eithun, Camilla Foyn (Master thesis, 2012)This objective of this thesis has been to development and analysis a measurement apparatus designed to determine thermal conductivity of porous materials. A literature survey concerning available experimental techniques ...