Blar i SINTEF Open på forfatter "Hellesø, Svein Magne"

Viser treff 1-10 av 10

    • Development of a web-based user-friendly cable ampacity calculation tool 

      Eberg, Espen; Espeland, Kåre; Hellesø, Svein Magne; Hvidsten, Sverre; Solheim, Kristian Thinn (Journal article; Peer reviewed, 2019)

    • Evaluation of simplified heat transport for power cables in pipes 

      Solheim, Kristian Thinn; Hellesø, Svein Magne; Eberg, Espen; Kantar, Emre (Chapter; Peer reviewed, 2023)
      Power cables in air- or water-filled pipes are the thermal bottleneck in many installations. Some parts of the industry reduce the complexity of their numerical models by combining conduction, convection, and surface-surface ...

    • Experimental study of electrocoalescence of water drops in crude oil using near-infrared camera 

      Hellesø, Svein Magne; Atten, Pierre; Berg, Gunnar; Lundgaard, Lars Esben (Journal article; Peer reviewed, 2015)
      Results are presented concerning the influence of an applied electric field on the coalescence of a water droplet with a much bigger water drop, both drops being immersed in a crude oil. This original study of electrocoalescence ...

    • Fabrication of a scaled MgB2 racetrack demonstrator pole for a 10 MW direct drive wind turbine generator 

      Magnusson, Niklas; Eliassen, J. C.; Abrahamsen, Asger B; Hellesø, Svein Magne; Runde, Magne; Nysveen, Arne; Moslått, Lars-Erik; Bjerkli, Jarle; King, Patrick (Journal article; Peer reviewed, 2018)
      Field windings made of MgB2 wires or tapes are considered for their potential to reduce volume, weight and cost of large offshore wind turbine generators. To gain experience of how to use this relatively new material in ...

    • Full-scale case study of a road crossing thermal bottleneck in buried MV cable installation 

      Eberg, Espen; Espeland, Kåre; Hellesø, Svein Magne; Hvidsten, Sverre (CIRED Conference Proceedings;2017, Chapter; Peer reviewed, 2017)
      Infrastructures such as road crossings, are often limiting the ampacity of a cable link due to poor thermal properties. In order to fully utilize the true loading capacity of the cable, thermal modelling with correct input ...

    • Implementation of finite element analysis and hybrid IEC-models in online ampacity tool 

      Eberg, Espen; Hellesø, Svein Magne; Strand, Henrik; Engebrethsen, Marius; Østerberg, Dan; Espeland, Kåre; Jacobsen, Rune (Chapter, 2023)
      Current tools for ampacity calculations are based on analytical expressions, and empirical expressions for complex laying geometries that in practice cannot be solved analytically, formulated in the IEC standards. Non-standard ...

    • Influence of surfactants on the electrohydrodynamic stretching of water drops in oil 

      Ervik, Åsmund; Penne, Torstein Eidsnes; Hellesø, Svein Magne; Munkejord, Svend Tollak; Müller, Bernhard (Journal article; Peer reviewed, 2017)
      In this paper we present experimental and numerical studies of the electrohydrodynamic stretching of a sub-millimetre-sized salt water drop, immersed in oil with added non-ionic surfactant, and subjected to a suddenly ...

    • Optimisation of power cable ampacity in offshore wind farm applications 

      Høyer-Hansen, Martin; Hellesø, Svein Magne; Solheim, Kristian Thinn; Mehammer, Eirill Bachmann; Eberg, Espen; Pedersen, Per Atle (Peer reviewed; Journal article, 2022)
      Inter-array power cables are used to connect wind turbines to the collector and export cable. In the transition from turbine tower to sea, the cable is installed in a J-tube, which has an unfavourable thermal environment ...

    • Simplified model for heat transport for cables in pipes 

      Hellesø, Svein Magne; Eberg, Espen (Peer reviewed; Journal article, 2021)
      This paper addresses challenges with modeling of heat transfer phenomenon for cables in duct or pipes when applying a numerical solution. Heat transport mechanisms between the cable and pipe surfaces are conduction, ...

    • Testing of an MgB2 coil for a wind turbine generator pole 

      Magnusson, Niklas; Hellesø, Svein Magne; Mikkonen, R.; Abrahamsen, A.B.; Runde, Magne; Berg, Gunnar; Nysveen, Arne (Peer reviewed; Journal article, 2021)
      We report on the testing of a 1 m long and 0.5 m wide racetrack coil wound from 4.5 km of MgB2 tape-shaped superconductors with a copper strip soldered to the nickel matrix. The cross-section of the coil corresponds to ...