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Heavy Lift Vessel Strategy Analysis for Offshore Wind

Heavy Lift Vessel Strategy Analysis for Offshore Wind. Iain Dinwoodie. iain.dinwoodie@strath.ac.uk. Centre for Doctoral Training, University of Strathclyde. http:// www.strath.ac.uk/windenergy. Overview. Motivation Objectives Methodology Results Future Work. Image: Nuon. Motivation.

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Heavy Lift Vessel Strategy Analysis for Offshore Wind

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  1. Heavy Lift Vessel Strategy Analysis for Offshore Wind Iain Dinwoodie iain.dinwoodie@strath.ac.uk Centre for Doctoral Training, University of Strathclyde http://www.strath.ac.uk/windenergy

  2. Overview Motivation Objectives Methodology Results Future Work Image: Nuon

  3. Motivation Large repairs costs a lot of money Failure behaviour uncertain and unpredictable Specialist vessel costs variable and potentially outwith operator control Image: REpower

  4. Motivation Failures requiring specialist vessels are less frequent but higher impact: Image: MPI Image: Subsea 7 Image: Windcat

  5. Objectives Investigate a range of possible operational strategies Understand when different strategies are optimal – wind farm size analysis Quantify how sensitive strategies are operational characteristics – failure rate analysis

  6. Strategy Specification Fix on fail (spot market) Batch fix on fail (x fails before commission) Short term (1-6) month yearly charter Purchase

  7. p(A, A) p(B, B) p(A, B) State A State B p(B, A) Methodology Markov Chain Monte Carlo failure simulation Time series climate repair model High degree of fidelity while remaining computationally efficient.

  8. Methodology – Climate Model Short term access windows Annual distribution Seasonality Correlation

  9. Baseline analysis Results

  10. Sensitivity Analysis Results Fail rate, λ

  11. Future work Full development of operational map identifying when different strategies are optimal Hybrid strategies and linking operational choice to strategic decision making Further investigation of very far offshore strategies such as ‘maintenance island’

  12. Thanks for listening iain.dinwoodie@strath.ac.uk http://www.strath.ac.uk/windenergy

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