Browsing NTNU Open by Author "Stålhane, Magnus"
Now showing items 61-71 of 71
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Optimizing Jack-up Vessel Chartering Strategies for Offshore Wind Farms
Mikkelsen, Andreas Jebsen; Kirkeby, Odin (Master thesis, 2016)Offshore wind energy is an industry in rapid growth. However, it is still outperformed by conventional sources of energy in terms of costs. One way to cut costs is to make operations and maintenance (O&M) more efficient; ... -
Optimizing Jack-up vessel strategies for maintaining offshore wind farms
Stålhane, Magnus; Christiansen, Marielle; Kirkeby, Odin; Mikkelsen, Andreas Jebsen (Journal article; Peer reviewed, 2017)In this paper we present a new two-stage stochastic mathematical programming model that determines the optimal jack-up vessel strategy for an offshore wind farm. Given an offshore wind farm site, and distance to shore the ... -
Optimizing the Design of Charter Contracts for Installation Vessels at Offshore Wind Farms using Branch-and-Price
Bruu, Marie Tyssen; Thorsen, Lea Bakkevig (Master thesis, 2022)Verdenssamfunnet tar sikte på å bli et lavkarbonsamfunn basert på fornybare energikilder innen kort tid. Havvind har vist potensiale til å kunne spille en sentral rolle i denne overgangen, men det er både tekniske og ... -
Optimizing the Vessel Fleet Used to Install an Offshore Wind Farm
Siljan, Oda Marie; Hansen, Kristine (Master thesis, 2017)Today, offshore wind is not a profitable source of energy compared to other energy sources. To increase the profitability of the offshore wind industry the life time costs of an offshore wind farm need to be reduced. Among ... -
Playing Style and Performance in Association Football: How to Invest Smarter
Bosnjak, Una; Vigerust, Olav Lund (Master thesis, 2022)Datadrevne metoder blir stadig viktigere for å oppnå innsikt i europeisk fotball. Målet med denne oppgaven er å utforske hvordan fotballklubber kan forbedre prestasjonene sine; dette gjennomføres ved å kombinere domenekunnskap ... -
Robust planning and disruption management in roll-on roll-off liner shipping
Sola Fischer, Andreas; Nokhart, Håkon Stavn; Olsen, Henrik; Fagerholt, Kjetil; Rakke, Jørgen Glomvik; Stålhane, Magnus (Journal article; Peer reviewed, 2016)This paper presents different strategies for handling disruptions in fleet deployment in roll-on roll-off liner shipping, which basically consists of assigning a fleet of vessels to predefined voyages at minimum cost. A ... -
Scheduling of maintenance tasks and routing of a joint vessel fleet for multiple offshore wind farms
Raknes, Nora Tangen; Ødeskaug, Katrine; Stålhane, Magnus; Hvattum, Lars Magnus (Journal article; Peer reviewed, 2017)Maintenance costs related to offshore wind farms are severely limiting their potential for being profitable. This paper proposes a new mathematical model that considers how maintenance tasks should be scheduled and performed ... -
Testing the robustness of optimal access vessel fleet selection for operation and maintenance of offshore wind farms
Sperstad, Iver Bakken; Stålhane, Magnus; Dinwoodie, Iain; Endrerud, Ole-Erik Vestøl; Martin, Rebecca; Warner, Ethan (Journal article; Peer reviewed, 2017)Optimising the operation and maintenance (O&M) and logistics strategy of offshore wind farms implies the decision problem of selecting the vessel fleet for O&M. Different strategic decision support tools can be applied to ... -
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 ... -
Valuing Individual Player Involvements in Norwegian Association Football
Nørstebø, Olav; Bjertnes, Vegard Rødseth; Vabo, Eirik (Master thesis, 2016)Evaluation of player performance in association football has to a large extent been limited to subjective opinions and simple, easily observable parameters such as goals, passing accuracy and ball recoveries. In this thesis, ... -
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)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 ...