• Recommended practices for wind farm data collection and reliability assessment for O&M optimization 

  Hahn, Berthold; Welte, Thomas Michael; Faulstich, Stefan; Bangalore, Pramod; Boussion, Cyril; Harrison, K; Miguelanez-Martin, Emilio; O'Connor, Frank; Pettersson, Lasse; Soraghan, Conaill; Stock-Williams, Clym; Sørensen, John Dalsgaard; van Bussel, Gerard; Vatn, Jørn (Peer reviewed; Journal article, 2017)

  The paper provides a brief overview of the aims and main results of IEA Wind Task 33. IEA Wind Task 33 was an expert working group with a focus on data collection and reliability assessment for O&M optimization of wind ...

• Development of a scale model of a Modular Multilevel Converters 

  Ljøkelsøy, Kjell; Guidi, Giuseppe (Peer reviewed; Journal article, 2017)

  Modular Multilevel Converters are now being introduced in the power grid. Control systems for these converters are complex with many degrees of freedom. Simulation models are useful for exploring control algorithms, but ...

• An engineering model for dynamic wind power plant flow 

  Merz, Karl Otto (Peer reviewed; Journal article, 2017)

  An engineering method is developed for the prediction of dynamic flow through a wind power plant, in the presence of turbine control actions. The model is composed of a simplified steady-state boundary layer model of ...

• Grid Integration of offshore wind farms using a Hybrid HVDC composed by an MMC with an LCC-based transmission system 

  Torres Olguin, Raymundo E.; Garces, Alejandro (Peer reviewed; Journal article, 2017)

  This paper presents a hybrid HVDC-transmission system composed by a Full-Bridge Modular Multilevel Converter (FB-MMC) and a Line-commutated Converter (LCC) from the grid integration of offshore wind farms. The operational ...

• Variables Affecting Emission Measurements from Domestic Wood Combustion 

  Seljeskog, Morten; Sevault, Alexis; Østnor, Asbjørn; Skreiberg, Øyvind (Peer reviewed; Journal article, 2017)

  Wood heating is an important worldwide source of emissions of particulate matter, comprising black and organic carbon. In Norway, woody biomass combustion is a significant source of particle emissions. In 2013 about 1.2 ...

• Local perceptions of opportunities for engagement and procedural justice in electricity transmission grid projects in Norway and the UK 

  Knudsen, Jørgen Kjetil; Wold, Line Camilla; Aas, Øystein; Haug, Jens Jacob Kielland; Batel, Susanna; Devine-Wright, Patrick; Qvenild, Marte; Jacobsen, Gerd Blindheim (Peer reviewed; Journal article, 2015)

  Transmission lines are critical infrastructures, but frequently contested especially at the local level, bylocal communities. The role of public engagement in processes pertaining to specific transmission lineprojects is ...

• Development and performance mapping of a multi-ejector expansion work recovery pack for R744 vapour compression units 

  Banasiak, Krzysztof; Hafner, Armin; Kriezi, Ekaterini E.; Madsen, Kenneth B.; Birkelund, Michael; Fredslund, Kristian; Olsson, Rickard (Peer reviewed; Journal article, 2015)

  A multi-ejector expansion pack, intended as a substitute for a standard high-pressure electronic expansion valve (HPV), was designed, manufactured and experimentally investigated. Four different ejector cartridges were ...

• Application range of the HEM approach for CO2 expansion inside two-phase ejectors for supermarket refrigeration systems 

  Palacz, Michal; Smolka, Jacek; Fic, Adam; Bulinski, Zbigniew; Nowak, Andrzej J.; Banasiak, Krzysztof; Hafner, Armin (Peer reviewed; Journal article, 2015)

  In this study, the accuracy of the homogeneous equilibrium (HEM) applied to 3-D CFD-based simulations of CO2 expansion inside two-phase ejectors is presented. The HEM approach previously reported in the literature were ...

• Prebreakdown phenomena in hydrocarbon liquids in a point-plane gap under step voltage. Part 1: behaviour at positive polarity 

  Linhjell, Dag; Lundgaard, Lars Esben; Unge, Michael; Hjortstam, Olof (Journal article; Peer reviewed, 2020)

  This study addresses the dielectric performance of nonpolar hydrocarbon liquids and mineral oils under positive polarity stress. It is of interest to improve knowledge on how functional properties of dielectric liquids ...

• Pre-breakdown phenomena in hydrocarbon liquids in a point-plane gap under step voltage. Part 2: behaviour under negative polarity and comparison with positive polarity 

  Lundgaard, Lars Esben; Linhjell, Dag; Hestad, Øystein Leif Gurandsrud; Unge, Michael; Hjortstam, Olof (Journal article; Peer reviewed, 2020)

  This study addresses the dielectric performance of nonpolar hydrocarbon liquids and mineral oils under negative polarity stress. Stopping length for non-breakdown streamers, breakdown voltages and velocities for various ...

• Impact of uncertainties on the design and cost of CCS from a waste-to-energy plant 

  Roussanaly, Simon; Ouassou, Jabir Ali; Anantharaman, Rahul; Haaf, Martin (Peer reviewed; Journal article, 2020)

• The Norwegian CCS Research Centre (NCCS): facilitating industry-driven innovation for fast-track CCS deployment 

  Brunsvold, Amy; Tangen, Grethe; Størset, Sigmund Østtveit; Dawson, James; Braathen, Alvar; Steenstrup-Duch, Anne; Aarlien, Rune; Mølnvik, Mona J. (Peer reviewed; Journal article, 2020)

• Fisketrapp i Hoelsfoss i Valldøla - Forslag til tiltak for forbedret fiskevandring 

  Fjeldstad, Hans-Petter (SINTEF Rapport;, Research report, 2020)

  I denne beskrivelsen av trappa i Hoelsfossen i Valldøla er det beskrevet at oppvandrende fisk kan hindres eller forsinkes forbi til turbinen.. Skjønnsmessig ser det ut til at fisken vil finne en vei forbi dette punktet, ...

• Architecture and laboratory implementation of a testing platform for Wide Area Monitoring Systems 

  Duong, Dinh Thuc; D'Arco, Salvatore; Tande, John Olav Giæver (Chapter; Peer reviewed, 2019)

  This paper presents a platform for testing wide area monitoring system (WAMS) applications in real time with a Hardware-in-the-Loop (HIL) approach. The power grid dynamics are emulated by performing real-time phasor ...

• The role of (de-)essentialisation within siting conflicts: An interdisciplinary approach 

  Batel, Susana; Devine-Wright, Patrick; Wold, Line Camilla; Egeland, Helene; Jacobsen, Gerd Blindheim; Aas, Øystein (Peer reviewed; Journal article, 2015)

  Large-scale renewable energy and associated technologies (RET), such as high voltage power lines (HVPL), often meet opposition from the local communities living nearby. Research has suggested that one of the main aspects ...

• Impact of Offshore Wind Power on System Adequacy in a Regional Hydro-based Power System with Weak Interconnections 

  Tande, John Olav Giæver; Korpås, Magnus (Peer reviewed; Journal article, 2012)

  This paper presents an innovative contribution in considering the combined effect of wind farms and grid transmission capacity on loss of load probability (LOLP), rather than just the effect of wind capacity alone. The ...

• Analysis of Grid Faults in Offshore Wind Farm with HVDC Connection 

  Marvik, Jorun Irene; Svendsen, Harald Georg (Peer reviewed; Journal article, 2013)

  Future offshore wind farms are expected to be built farther away from shore and have larger capacities than today. This leads to new challenges related to grid connection. At distances longer than roughly 100 km, HVDC ...

• CO2Mix Project: Experimental Determination of Thermo Physical Properties of CO2-Rich Mixtures 

  Løvseth, Sigurd Weidemann; Skaugen, Geir; Stang, Hans Georg Jacob; Jakobsen, Jana Poplsteinova; Wilhelmsen, Øivind; Span, Roland; Wegge, Robin (Peer reviewed; Journal article, 2013)

  The CO2Mix project is established in order to fill important knowledge gaps regarding thermophysical properties of CO2-rich mixtures relevant for CCS conditioning and transport. Even small amounts of impurities can have a ...

• NOWIcob - A tool for reducing the maintenance costs of offshore wind farms 

  Hofmann, Matthias; Sperstad, Iver Bakken (Peer reviewed; Journal article, 2013)

  It is essential to implement cost-effective operation and maintenance concepts and strategies to achieve a significant reduction of cost of energy from offshore wind farms. A decision support tool (Norwegian offshore wind ...

• Numerical Simulation of Differential Molecular Diffusion Effects in a Hydrogen-rich Turbulent Jet Using LEM3D 

  Sannan, Sigurd; Kerstein, Alan R (Peer reviewed; Journal article, 2014)

  The LEM3D stochastic model for numerical simulation of turbulent mixing is used to simulate differential molecular diffusion effects in an isothermal jet of hydrogen and Freon 22 issued into air. The computations are ...

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