Blar i Institutt for energi og prosessteknikk på tittel
Viser treff 4103-4122 av 4141
-
Whole building life cycle Assessment(WBLCA) of an adaptive reuse of a heritage building: A case study of an Industrial building
(Master thesis, 2023)Rehabilitering av bygninger og adaptiv gjenbruk er kjent for å ha mindre miljøpåvirkning sammenlignet med riving av eksisterende bygning og oppføring av et nytt bygg. Imidlertid kan renovering og adaptive gjenbruksprosesser ... -
Why rogue waves occur atop abrupt depth transitions
(Journal article; Peer reviewed, 2021)Abrupt depth transitions (ADTs) have recently been identified as potential causes of ‘rogue’ ocean waves. When stationary and (close-to-) normally distributed waves travel into shallower water over an ADT, distinct spatially ... -
Wind Effects on a Sports Arena
(Master thesis, 2016)Wind effects on the Maier sports arena have been investigated with three different experiment types. The experiments were performed with open land and nearby structures , with south, southwest and west wind direction. ... -
Wind Farm Control Methods - Yawing
(Master thesis, 2016)The wake effect of yawing an upstream turbines is of interest in order to increase power production. In this study, the case of yawing is considered as asymmetric do to the tower and rotor rotation, and measurements have ... -
Wind farm performance
(Master thesis, 2016)Performance of the wind turbine in the wind farm has been analyzed using IEC61400-12-1 wind turbine power measurement standard. Ten minutes averaged wind data was acquired from Windcube v2 LIDAR over the period of twelve ... -
Wind farm performance - Power Analysis of a wind turbine
(Master thesis, 2016)Wind conditions from a wind farm situated in Ørland were analyzed based on a ten minute measurements in order to obtain the power and efficiency curves. The results from the analysis were compared with different curves ... -
Wind field measurements in urban environments
(Master thesis, 2021)Ettersom verden streber etter å senke klima utslipp og forurensing blir fokuset mer og mer rettet mot fornybar energiproduksjon. Kan vind produksjon i urbane miljøer bidra til å senke både lokale og globale utslipp. Et ... -
Wind in Complex Terrain - Lidar Measurements for Evaluation of CFD Simulations
(Journal article; Peer reviewed, 2018)Computational Fluid Dynamics (CFD) is widely used to predict wind conditions for wind energy production purposes. However, as wind power development expands into areas of even more complex terrain and challenging flow ... -
Wind power for cooking
(Master thesis, 2023)Tilgangen på elektrisitet i Tanzania har det siste tiåret vært av de raskest voksende i subsahariske Afrika, med en økende tilgang fra 7% til 37.7% mellom 2011 og 2020. Selv om tilgangen i urbane områder har nådd 73.2%, ... -
Wind power for cooking
(Master thesis, 2023)Tilgangen på elektrisitet i Tanzania har det siste tiåret vært av de raskest voksende i subsahariske Afrika, med en økende tilgang fra 7% til 37.7% mellom 2011 og 2020. Selv om tilgangen i urbane områder har nådd 73.2%, ... -
Wind tunnel experiments on wind turbine wakes in yaw: effects of inflow turbulence and shear
(Journal article; Peer reviewed, 2018)The wake characteristics behind a yawed model wind turbine exposed to different customized inflow conditions are investigated. Laser Doppler anemometry is used to measure the wake flow in two planes at x∕D = 3 and x∕D = 6, ... -
Wind tunnel experiments on wind turbine wakes in yaw: redefining the wake width
(Journal article; Peer reviewed, 2018)This paper presents an investigation of wakes behind model wind turbines, including cases of yaw misalignment. Two different turbines were used and their wakes are compared, isolating effects of boundary conditions and ... -
Wind tunnel investigation on the effect on the turbine tower on wind turbines wake symmetry
(Journal article; Peer reviewed, 2017)In wind farms, the wake of the upstream turbines becomes the inflow for the downstream machines. Ideally, the turbine wake is a stable vortex system. In reality, because of factors like background turbulence, mean flow ... -
Wind tunnel model testing of offshore platforms
(Master thesis, 2012)The purpose of this thesis is to highlight some of the areas of interest when it comes to wind tunnel experimenting of offshore platforms regarding stability concerns such as critical angles and wind overturning moment. ... -
Wind tunnel study on power output and yaw moments for two yaw-controlled model wind turbines
(Journal article; Peer reviewed, 2018)In this experimental wind tunnel study the effects of intentional yaw misalignment on the power production and loads of a downstream turbine are investigated for full and partial wake overlap. Power, thrust force and yaw ... -
Wind Tunnel Study on the Tip Speed Ratio’s Impact on a Wind Turbine Wake Development
(Peer reviewed; Journal article, 2022)(based on the turbine diameter and the freestream velocity). For all cases, the mean streamwise velocity deficit at the centerline evolves close to a power law in the far wake, and we check the validity of the Jensen and ... -
Wind Turbine Design: Evaluation of Dynamic Loads on Large Offshore Wind Turbines
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:241, Doctoral thesis, 2012)A design method for combined aerodynamic and structural (aeroelastic) design of large wind turbine blades has been developed, with the purpose of facilitating conceptual design, parametric studies, optimisation, or cost ... -
Wind Turbine Simulations with OpenFOAM
(Master thesis, 2018)An actuator disk model is improved by including an impermeable hub and nacelle. This improves the wake flow a lot, but it turns out that the actuatorDiskExplicitForce model is mesh dependent. A mesh is made that provides ... -
Wind Turbine Wake Interactions - The Influence of Shear on a Wind Turbine Wake
(Master thesis, 2015)Full wake measurements have been performed on a model wind turbine at NTNU s wind tunnel to investigate the impact of shear flow compared to uniform flow on the wake flow. Mean and turbulent velocity measurements have been ... -
Winglet optimization for a model-scale wind turbine
(Peer reviewed; Journal article, 2018)A winglet optimization method is developed and tested for a model-scale wind turbine. The best-performing winglet shape is obtained by constructing a Kriging surrogate model, which is refined using an infill criterion based ...