Browsing NTNU Open by Title

Now showing items 100402-100421 of 101468

    • Wind affecting berthing operations 

      Kløvning, Erik Mikal (Peer reviewed; Journal article, 2020)
      ABSTRACT: Almost every voyage culminates in a manoeuvre to berth the ship safely along a quay or wharf. During this phase a ship is affected by a number of factors, one of them being wind. This paper seeks to understand ...

    • Wind and soil model influences on the uncertainty in fatigue of monopile supported wind turbines 

      Sørum, Stian Høegh; Bachynski-Polic, Erin Elizabeth; Amdahl, Jørgen (Peer reviewed; Journal article, 2022)
      Several alternative engineering models are available for the use in analysis of offshore wind turbines. However, it is not always clear which of the models will yield the most accurate or sufficiently conservative results. ...

    • Wind and tidal turbine blade root connection 

      Eriksen, Bård Meling (Master thesis, 2011)
      Efficient bolted joint design is an essential part of designing structures from fiber reinforced polymer materials. This thesis was done to find a good approach to a three-dimensional finite element model of the root ...

    • Wind deflection analysis of railway catenary under crosswind based on nonlinear finite element model and wind tunnel test 

      Song, Yang; Zhang, Mingjie; Øiseth, Ole Andre; Rønnquist, Anders (Peer reviewed; Journal article, 2022)
      This paper evaluates the railway catenary's wind deflection under crosswind based on wind tunnel experiments and a nonlinear finite element model. A catenary model is constructed based on the absolute nodal coordinate ...

    • Wind Effects on a Sports Arena 

      Sundt, Sven-Håkon Wold (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 Estimation with Multirotor UAVs 

      Meier, Kilian; Hann, Richard; Skaloud, Jan; Garreau, Arthur (Peer reviewed; Journal article, 2022)
      Unmanned Aerial Vehicles (UAVs) have benefited from a tremendous increase in popularity over the past decade, which has inspired their application toward many novel and unique use cases. One of them is the use of UAVs in ...

    • Wind farm control - Part I: A review on control system conceptsand structures 

      Andersson, Leif Erik; Anaya-Lara, Olimpo; Tande, John Olav Giæver; Merz, Karl Otto; Imsland, Lars Struen (Journal article; Peer reviewed, 2021)
      Wind farm control design is a recently new area of research that has rapidly become a key enabler for the development of large wind farm projects and their safe and efficient connection to the power grid. A comprehensive ...

    • Wind Farm Control Methods - Yawing 

      Gitmark, John Magne (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 Layout Optimization using Population Distributed Genetic Algorithms 

      Tangen, Helene (Master thesis, 2016)
      Wind turbine technology is a promising source of renewable energy. However, the potential of wind turbine technology can not be utilized unless the wind farm layout is efficient. The challenge with wind farm layout ...

    • Wind farm performance 

      Marjan, Ali (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 

      Esquinas Herrera, Alejandro (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 farm site selection assessment in the Greater Accra, Volta and eastern regions of Ghana : a GIS spatial multi-criteria assessment 

      Kabu, Isaiah Kabutey (Master thesis, 2016)
      Global temperatures have increased since preindustrial times and will continue to do so unless practical measures are taken to halt the emission of carbon and other ozone depleting substances. Wind energy alone has the ...

    • Wind farm voltage dip measurements 

      Marvik, Jorun Irene; Tande, John Olav Giæver; Uhlen, Kjetil (Journal article; Peer reviewed, 2014)
      This paper is based on continuous measurements of voltages and currents from three wind farms for a period of 1 year, and the focus is on voltage dips. The purpose is to get an overview of the characteristics and rate of ...

    • Wind farms and their perceived impact on local landscapes : a comparative study between China and Norway 

      Song, Linan (Master thesis, 2014)
      It is widely recognized that developing of renewable energy is a good way to reduce carbon emissions. China has set ambitious goals to increase the use of wind power. Developing wind power in rural areas is also one of the ...

    • Wind field measurements in urban environments 

      Krohg, Petter Nicolai (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 Field Variability in Complex Terrain: Lessons from the Hardanger Bridge 

      Fenerci, Aksel; Øiseth, Ole Andre (Chapter; Peer reviewed, 2019)
      Along the Coastal Highway E39 in the western coast of Norway, Norwegian Government is planning to build several extreme bridges spanning from 1.5 to 5 km. The region is typically mountainous with deep fjords seeping inland. ...

    • Wind flow studies for drifting snow on roads / 

      Thordarson, Skuli (Dr. ingeniøravhandling, 0809-103X; 2002:82, Doctoral thesis, 2002)
      During strong winds, drifting snow causes problems on roads in many harsh winter climate countries. Increased snow-removal costs, reduced access and safety problems are typical results of excessive snowdrift sedimentation ...

    • Wind forces on bridge decks using state-of-the-art FSI methods 

      Helgedagsrud, Tore Andreas (Doctoral theses at NTNU;2019:180, Doctoral thesis, 2019)
      Several bridges with span widths that challenge present technology are currently under planning in Norway, and wind effects are among the major concerns. Traditionally, wind-structure interactions are studied experimentally ...

    • Wind in Complex Terrain - Lidar Measurements for Evaluation of CFD Simulations 

      Risan, Andrea; Lund, John Amund; Chang, Chi-Yao; Sætran, Lars Roar (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 in the North Sea.: Effects of offshore grid design on power system operation. 

      Bergfjord, Line (Master thesis, 2011)
      In this thesis a method was developed to evaluate and compare various offshore grid topology and capacity choices. A small power system was created for the purpose of the study, including prototypes of offshore grids. To ...