Viser treff 32488-32507 av 32785

    • Wind Power Prediction with Machine Learning Methods in Complex Terrain Areas 

      Sæther, Brynhild Bentsen (Master thesis; Mastergradsoppgave, 2021-06-29)
      The increasing amount of intermittant wind energy sources connected to the power grid present several challenges in balancing the power network. Accurate prediction of wind power production is identified as one of the most important measures for balancing the power network while maintaining a sustainable integration of wind power in the power grid. However, the volatile nature of wind makes wind ...
    • Wind power predictions in complex terrain using analog ensembles 

      Birkelund, Yngve; Alessandrini, Stefano; Byrkjedal, Øyvind; Monache, Luca Delle (Journal article; Tidsskriftartikkel, 2018)
    • Wind redistribution of snow impacts the Ka- and Ku-band radar signatures of Arctic sea ice 

      Nandan, Vishnu; Willatt, Rosemary; Mallett, Robbie; Stroeve, Julienne; Geldsetzer, Torsten; Scharien, Randall; Tonboe, Rasmus; Yackel, John; Landy, Jack Christopher; Clemens-Sewall, David; Jutila, Arttu; Wagner, David N.; Krampe, Daniela; Huntemann, Marcus; Mahmud, Mallik; Jensen, David; Newman, Thomas; Hendricks, Stefan; Spreen, Gunnar; Macfarlane, Amy; Schneebeli, Martin; Mead, James; Ricker, Robert; Gallagher, Michael; Duguay, Claude; Raphael, Ian; Polashenski, Chris; Tsamados, Michel; Matero, Ilkka; Hoppmann, Mario (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-06-02)
      Wind-driven redistribution of snow on sea ice alters its topography and microstructure, yet the impact of these processes on radar signatures is poorly understood. Here, we examine the effects of snow redistribution over Arctic sea ice on radar waveforms and backscatter signatures obtained from a surface-based, fully polarimetric Ka- and Ku-band radar at incidence angles between 0∘ (nadir) and 50∘. ...
    • Wind resource assessment and siting for the expansion of Fakken wind park 

      Bjugg, Martine (Master thesis; Mastergradsoppgave, 2023-05-31)
      Norway is anticipated to experience an energy deficit in the coming years, and one solution to address this issue is the implementation of new renewable energy sources. To mitigate the projected energy deficit, increased energy production is required. With its considerable wind potential, the country offers ample opportunities for wind energy development. Consequently, there is a growing demand for ...
    • Wind resource assessment in cold climate regions 

      Jin, Jiayi (Master thesis; Mastergradsoppgave, 2017-06-14)
      Cold regions have good potential for wind energy development, but icing on wind turbines is recognize as a hindrance limiting the wind energy production in ice prone cold regions. This master thesis work is linked with Wind-CoE project of Arctic Technology Research Team and is aimed on better understanding of wind resource assessment in cold regions. Three years (2013-15) field SCADA data from ...
    • Wind resource assessment using mesoscale modelling. A case study at the potential wind farm site Rieppi 

      Blæsterdalen, Torgeir (Master thesis; Mastergradsoppgave, 2016-06-01)
      The growing wind power industry, increased occurrence of extreme weather, and the need for becoming independent of fossil fuels motivate the research on accurate simulation of near-surface wind. The aim of this study is wind resource assessment at the potential wind park site Rieppi, using two on-site measurement masts, simulations from the Weather Research and Forecasting (WRF) model, and ERA-Interim ...
    • Wind resource assessment using weather research and forecasting model. A case study of the wind resources at Havøygavlen wind farm 

      Fossem, Anders Aarhuus (Master thesis; Mastergradsoppgave, 2019-12-13)
      The need for energy increases globally due to rapid expansion of population and prosperity. To meet this demand while decreasing carbon emission and eventually transition out fossil fuel, efficient utilization of wind power is prominent. This study evaluates the performance of the Weather Research and Forecast model (WRF) with respect to wind speed and wind direction. The area of the study is ...
    • Wind speed and direction predictions by WRF and WindSim coupling over Nygårdsfjell 

      Bilal, Muhammad; Birkelund, Yngve; Solbakken, Kine (Journal article; Tidsskriftartikkel; Peer reviewed, 2016)
      In this study, the performance of the mesoscale meteorological Weather Research and Forecast (WRF) model coupled with the microscale computational fluid dynamics based model WindSim is investigated and compared to the performance of WRF alone. The two model set-ups, WRF and WRF-WindSim, have been tested on three high-wind events in February, June and October, over a complex terrain at the ...
    • Wind turbine and ice breaking 

      Nilsen, Peter Tor Furseth (Master thesis; Mastergradsoppgave, 2019-06-28)
      The arctic climate imposes the challenge of ice accretion on the blades of the wind turbine created by the atmospheric ice. Over time, the ice build-up causes ice shedding which can do structural damage to the wind turbine. The process involving ice breaking and shedding is not well understood. This document explains the mechanical properties of ice such as density, coefficient of thermal expansion, ...
    • Wind Turbine System Performance and Reliability Trend Analysis 

      Gebremichael, Michael (Master thesis; Mastergradsoppgave, 2022-01-30)
      This thesis project is a part of my master’s study course at the department of technology and safety. My thesis is focused on renewable energy, especially analyzing of energy production and technical performance of existing wind turbines within the arctic region. To that end it was important to contact local wind farm owners for operational data exchange. Using partners production and fault related ...
    • Wind Turbine Wake Effects on Wind Resource Assessments – a Case Study 

      Jin, Jia Yi; Ghani, Rizwan; Virk, Muhammad Shakeel (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-08-24)
      This paper describes a case study of wind turbine wake loss effects on wind resource assessment in cold region. One year wind park SCADA data is used. Computational Fluid Dynamics (CFD) based numerical simulations are carried out for wind resource assessment and estimation of resultant Annual Energy Production (AEP). Numerical results are compared with the field SCADA data, where a good agreement ...
    • WIND-PVPA: Water/Ion NMR Detected PVPA to assess lipid barrier integrity in vitro through quantification of passive water- and ion transport 

      Rainsford, Philip Ben; Sarre, Birta R.; Falavigna, Margherita; Brandsdal, Bjørn Olav; Flaten, Gøril Eide; Jakubec, Martin; Isaksson, Johan Mattias (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-22)
      Water/Ion NMR Detected – Phospholipid Vesicle Permeability Assay (WIND-PVPA), is presented as a novel, straightforward and automatable method to assess lipid barrier integrity in vitro. The apparent permeability constants of water- and ions across the PVPA barriers are determined in a one-pot experiment under the influence of membrane-active guest molecules. NMR spectroscopy is used to quantify ...
    • A window of opportunities: Composing a relational space for living and telling sustainable stories to live by 

      Lyngstad, Mette Bøe; Blix, Bodil Hansen (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-11-22)
      This article is based on experiences with the Dreamcatchers, a project involving people living with substance addiction, and their significant others, in which the participants composed and explored narratives through creative, collaborative processes. In the article, we think with a narrative composed by one of the participants in the project to learn from her experiences. Our thinking is inspired ...
    • A window of opportunities: Composing a relational space for living and telling sustainable stories to live by 

      Lyngstad, Mette Bøe; Blix, Bodil Hansen (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-11-22)
      This article is based on experiences with the Dreamcatchers, a project involving people living with substance addiction, and their significant others, in which the participants composed and explored narratives through creative, collaborative processes. In the article, we think with a narrative composed by one of the participants in the project to learn from her experiences. Our thinking is inspired ...
    • Windtech Technology - Measuring Cold Exposure via Conjugate Heat Transfer 

      Khawaja, Hassan (Conference object; Konferansebidrag, 2020)
      Windtech technology is based on a novel patented technique of measuring cold exposure (UK Patent Office Application Number: 1914757.8, titled: Measuring cold exposure, dated: 11th October 2019). In this technology, the cold is measured via the response of an electrical heater exposed to environmental elements such as ambient temperature, wind, humidity, and irradiance. In this technology, the heater ...
    • Windtech – A Sensory Device for ‘Cold’ Sensation Measurements 

      Leyli, Amir Nadem; Khawaja, Hassan; Antonsen, Ståle; Swart, Daniel Kristoffer (Journal article; Tidsskriftartikkel, 2021-12-21)
      Windtech device is a novel tool for measuring the sensation of the ‘cold’. Cold poses numerous challenges for industrial operations, human survival, and living convenience. The impact of the cold is not possible to be quantified just based on temperatures; however other factors such as wind speed, humidity, irradiance have to be taken into consideration. Efforts have been made to develop combined ...
    • Winnie the Pooh in the classroom 

      Knudsen, Elisabeth M. (Master thesis; Mastergradsoppgave, 2012-06-01)
      In this master’s thesis, I have chosen to write about Winnie the Pooh, and the main characters of four children’s books written by Alan Alexander Milne and illustrated by E.H. Sheppard. The statement of hypothesis is: Can the characters in Winnie the Pooh be argued to be personifications of the various traits of Christopher Robin? And what can these traits tell us, when shown, in a pupil? To answer ...
    • Winter behaviour of riverine anadromous Arctic charr and sea trout in northern Norway 

      Jensen, Jenny Lovisa Alexandra (Master thesis; Mastergradsoppgave, 2008-05)
      Based on earlier migration studies of lake-dwelling anadromous Arctic charr Salvelinus alpinus (L.) and sea trout Salmo trutta L. in northern Norway, both species are believed to solely overwinter in fresh water and spend only one to three months in the sea during summer. This is an assumption upon which all current management of the species in the area is based, although no studies have focused on ...
    • Winter is coming: Wintertime mindset and wellbeing in Norway 

      Leibowitz, Kari; Vittersø, Joar (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-30)
      Previous research of the effect of winter on wellbeing has yielded contradictory findings. While there is evidence that the lack of sunlight in wintertime can lead to seasonal depression and negative emotions, many individuals are able to thrive during the winter. What might determine whether the darkness of winter leads to poor psychological outcomes? To investigate whether or not mindset contributes ...
    • Winter quarters of wetland ground beetles (Coleoptera, Carabidae) in South Scandinavia 

      Andersen, Johan (Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
      Sites at various distances from eutrophic and mesotrophic lakes and fens on the island Öland in southern Sweden were systematically surveyed in summer (May–August) and autumn (late September–October) to elucidate the hibernation sites of wetland carabid beetles. Thirty-five of 47 wetland species were found in their winter quarters. In areas ≤50 m from the lakes and fens, the observed as well as the ...