Browsing Fakultet for ingeniørvitenskap (IV) by Title
Now showing items 11909-11928 of 23013
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Investigations of a harmonic oscillatory flow
(Master thesis, 2017)Power companies are on a daily basis making operational strategies to operate power plants in an efficient and good way. To do this must all impacts and challenges with influence be comprised in the analytical work. In a ... -
Investigations of Accelerated Climate Aged Wood Substrates by Fourier Transform Infrared Radiation Material Characterization
(Journal article; Peer reviewed, 2012)Fourier transform infrared (FTIR) material characterization by applying the attenuated total reflectance (ATR) experimental technique represents a powerful measurement tool. The ATR technique may be applied on both solid ... -
Investigations of Compressible Turbulent Flow in a High-Head Francis Turbine
(Journal article; Peer reviewed, 2017)Dynamic stability of the high-head Francis turbines is one of the challenging problems. Unsteady rotor–stator interaction (RSI) develops dynamic stresses and leads to crack in the blades. In a high-head turbine, vaneless ... -
Investigations of Different Control Strategies for Heat Pump Systems in a Residential nZEB in the Nordic Climate
(Chapter, 2017)The paper investigates different control strategies for a ground source heat pump of a Norwegian residential zero emission building, with detailed dynamic simulations (here using IDA ICE). These rule-based controls aim at ... -
Investigations of Non-Ideal Hook Load Behavior during Tripping Operations for Well G-45
(Master thesis, 2011)This thesis has analyzed hook load data from well G-45 in Calispera C describing a tripping operation. The purpose of the analysis has been to identify and analyze non-ideal hook load behavior representing non-ideal borehole ... -
Investigations of Rake and Rib Structures in Sand Traps to Prevent Sediment Transport in Hydropower Plants
(Journal article; Peer reviewed, 2021)In order to increase the lifespan of hydraulic turbines in hydropower plants, it is necessary to minimize damages caused by sediment erosion. One solution is to reduce the amount of sediments by improving the design of ... -
Investigations of Shear Interaction and Stress in Flexible Pipes and Umbilicals
(Doctoral theses at NTNU;2018:368, Doctoral thesis, 2018)The present thesis deals with numerical modeling and experimental testing related to dynamic stress behavior of flexible pipes and umbilicals, with particular focus on shear interaction and friction effects. For the ... -
Investigations of some material properties for structural analysis of LECA masonry
(Dr. ingeniøravhandling, 0809-103X; 2001:9, Doctoral thesis, 2001)Masonry made from Light Expanded Clay Aggregate (LECA) concrete blocks is by far the most popular manufactured masonry in Norway. LECA is a lightweight aggregate (LWA). The main objective of this study is to expand the ... -
Investigations of the extended Eddy Dissipation Concept formulation for weakly turbulent and slow chemistry flames
(Peer reviewed; Journal article, 2023)Recent extensions of the Eddy Dissipation Concept (EDC) are investigated with the purpose of analysing the importance of model limiters to the EDC performance when predicting Moderate and Intense Low-oxygen Dilution (MILD) ... -
Investigations of the long-term extreme buffeting response of long-span bridges using importance sampling Monte Carlo simulations
(Peer reviewed; Journal article, 2022)Several studies have shown that site measurements of the buffeting responses of long-span bridges do not always agree with predictions from analytical models. The observed discrepancy is believed to be explained by the ... -
Investigations of unsteady pressure loading in a Francis turbine during variable-speed operation
(Journal article; Peer reviewed, 2017)Current study was aimed to investigate the unsteady pressure loading in a model Francis turbine under variable-speed configurations. Focus was to investigate the time-dependent characteristic frequencies and the pressure ... -
Investigations on mixture preparation for two phase adiabatic pressure drop of R134a flowing in 5 mm diameter channel
(Journal article; Peer reviewed, 2017)The article presents detailed two-phase adiabatic pressure drops data for refrigerant R134a. Study cases have been set for a mass flux varying from 200 to 400 kg/m2 s, at the saturation temperature of 19.4 ◦C. Obtained ... -
Investigations on the Development of a Cost Model for Large Infrastructure Elements, Exemplified by the Proposal for an Aluminium Suspension Bridge over the Langenuen Fjord in Norway
(Master thesis, 2021)Aluminium har et stort potensial som materiale i store konstruksjonsprosjekter, spesielt med tanke på dens egenskaper som kan gi redusert vedlikehold og økt levetid på konstruksjonene. Likevel er bruken av aluminium liten ... -
Investigations on the feasibility of the CWE method to verify potential alkali release from aggregates in Norwegian field concrete
(Chapter, 2021)Concrete elements exposed for 26 years to seawater spray and deicing salts along a road close to Sandnessjøen in Norway were investigated. Concrete cores from 4 elements with different binder compositions (A: 100 % Portland ... -
Investigations on the Sustainable Resource Use of Swiss Timber
(Peer reviewed; Journal article, 2021)In Switzerland, the advantages of timber buildings for the climate are broadly discussed. In the following paper, a comparative sustainability assessment of four building alternatives is presented. Especially the contribution ... -
Investigative Study on Method for Approximating Nonlinear Material Behavior in Reinforced Concrete Structures Subjected to Seismic Ground Motions
(Master thesis, 2019)Ikke-lineære tidsplansanalyser blir generelt ansett som den mest nøyaktige metoden for å anal- ysere responsen til konstruksjoner utsatt for seismiske laster. Dessverre er denne typen analyser svært krevende beregningsmessig, ... -
Investing for Impact. Lessons with the Norwegian State Project Model and the first ivvestment projects that have been subjected to external quality assurance
(Concept rapport;36, Book, 2013)The report provides a description of the Norwegian State Project Model, also referred to as the government’s scheme for external quality assurance of major public investment projects (the QA scheme). The scheme was introduced ... -
Investorers vurdering av prosjekters godhet
(Concept Rapport, 0804-5585; 20, Research report, 2007)Rapporten studerer grunnlaget for beslutninger om å investere i et prosjekt. Studien tar utgangspunkt i de vurderinger av prosjekters godhet som utføres av den private investor ved større realinvesteringer. Basert på innsikt ... -
An Invitation on Characterization of H<inf>2</inf>-Reduced Bauxite Residue and Recovering Iron through Wet Magnetic Separation Processes
(Peer reviewed; Journal article, 2023)Recovering iron from the bauxite residue (BR) is one of the long-standing challenges in the mining industry. However, there is a substantial lack of information in the literature regarding sample properties and iron ... -
(Invited) Novel Fuel Production Based on Sonochemistry and Sonoelectrochemistry
(Journal article; Peer reviewed, 2019)Sonochemistry has been used in many applications where it is employed to improve both catalytic and synthetic processes; whereas, sonoelectrochemistry has been used in various studies including organic syntheses, environmental ...