Blar i Publikasjoner fra CRIStin - SINTEF Ocean på forfatter "Halvorsen-Weare, Elin Espeland"

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    • A metaheuristic solution method for optimizing vessel fleet size and mix for maintenance operations at offshore wind farms under uncertainty 

      Halvorsen-Weare, Elin Espeland; Norstad, Inge; Stålhane, Magnus; Nonås, Lars Magne (Journal article; Peer reviewed, 2017-10)
      Maintenance operations at offshore wind farms are challenging due to the offshore element; maintenance technicians and spare parts need to be transported from an onshore port or offshore station to the individual wind farm ...

    • A model for optimal fleet composition of vessels for offshore wind farm maintenance 

      Gutierrez-Alcoba, Alejandro; Ortega, Gloria; Hendrix, Eligius M.T.; Halvorsen-Weare, Elin Espeland; Haugland, Dag (Journal article; Peer reviewed, 2017)
      We present a discrete optimisation model that chooses an optimal fleet of vessels to support maintenance operations at Offshore Wind Farms (OFWs). The model is presented as a bi-level problem. On the first (tactical) level, ...

    • Operation and Maintenance Modelling 

      Welte, Thomas Michael; Sperstad, Iver Bakken; Halvorsen-Weare, Elin Espeland; Netland, Øyvind; Nonås, Lars Magne; Stålhane, Magnus (Chapter, 2018)
      Operational expenditure (OPEX) is one of the major contributors to the levelized cost of energy (LCoE) for offshore wind farms. To assess different solutions and select the best ones, good models for maintenance and logistics ...

    • Predictive maintenance logistics for offshore wind farms 

      Halvorsen-Weare, Elin Espeland; Nonås, Lars Magne (SINTEF rapport;2022:01147 A, Research report, 2022-06-30)
      This report contains a summary of state-of-the-art for maritime logistics planning of maintenance activities at offshore wind farms within mathematical programming and simulation. It presents a description of a shift from ...

    • The Bi-objective Mixed Capacitated General Routing Problem with Different Route Balance Criteria 

      Halvorsen-Weare, Elin Espeland; Savelsbergh, Martin W.P. (Journal article; Peer reviewed, 2016)
      In the mixed capacitated general routing problem, one seeks to determine a minimum cost set of vehicle routes serving segments of a mixed network consisting of nodes, edges, and arcs. We study a bi-objective variant of the ...

    • The LEANWIND suite of logistics optimisation and full lifecycle simulation models for offshore wind farms 

      McAuliffe, Fiona Devoy; Lynch, Katie; Sperstad, Iver Bakken; Nonås, Lars Magne; Halvorsen-Weare, Elin Espeland; Jones, Dylan; Wall, Graham; Irawan, Chandra; Norstad, Inge; Stålhane, Magnus (Journal article; Peer reviewed, 2018)
      The offshore wind sector has achieved significant cost reductions in recent years. However, there is still work to be done to maintain and surpass these savings across current and future farms. There is increased competition ...

    • Vessel Fleet Optimization for Maintenance Operations at Offshore Wind Farms under Uncertainty 

      Stålhane, Magnus; Vefsnmo, Hanne; Halvorsen-Weare, Elin Espeland; Hvattum, Lars Magnus; Nonås, Lars Magne (Journal article; Peer reviewed, 2016-09)
      In this paper we consider the problem of determining the optimal fleet size and mix of vessels to support maintenance activities at offshore wind farms. A two-stage stochastic programming model is proposed where uncertainty ...