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Concept Study and Design ofFloating Offshore Wind TurbineSupport Structure
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Naval Systems.
2018 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

There is a need for renewable energy sources that can replace the non-renewable energy sourcesthat we use today. This is on the agenda as one of the United Nations sustainable developmentgoals. Embracing new technologies is addressed as one of the ways of achieving aordable,reliable, sustainable and modern energy for all. Oshore wind power has great potential as anenergy source, and development of the oating solutions is of special importance.In this report, key design parameters of oating oshore wind turbines are identied based ona literature study on research projects as well as on-going test turbines and wind farms. Thekey design parameters should be used for determining the type of technology suitable for aproject, as well as for guidance in the design phase.Based on the key design parameters, a conceptual design of a semisubmersible substructurehas been made for the DTU 10 MW reference wind turbine for a site outside the island ofBarra, west of Scotland. The substructure is a three column semisubmersible connected witha closed shape pontoon and no bracing. The wind turbine is placed on top of one of the threecolumns to reduce number of columns and utilize more of the structure.Variation of the column diameter and distance between the columns has been studied to ndsuitable main dimensions. Mass estimations has been made and the required amount of ballasthas been calculated for a set of combinations to select a conguration for further analysis.Hydrostatic and hydrodynamic analysis has been performed on the design to understand itscharacteristics in the ocean environment. Intact stability is considered in the hydrostatic analysis,and the hydrodynamic analysis includes a study of the motions, loads and accelerationsof the structure.

Place, publisher, year, edition, pages
2018. , p. 114
Series
TRITA-SCI-GRU ; 2018:281
National Category
Vehicle Engineering
Identifiers
URN: urn:nbn:se:kth:diva-243092OAI: oai:DiVA.org:kth-243092DiVA, id: diva2:1285492
External cooperation
Wood Group Norway
Examiners
Available from: 2019-02-04 Created: 2019-02-04 Last updated: 2019-02-04Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf