NOVA project: lessons learnt during the conceptual phase of the design of a floating support structure for an offshore vertical axis wind turbine

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

2 Citations (Scopus)

Abstract

The Energy Technologies Institute (ETI, UK) funded project called NOVA (for Novel Vertical Axis wind turbine) examined the feasibility of a large offshore vertical axis wind turbine in the 5 to 10 MW power range, with a view toward 20 MW. The NOVA feasibility study required a methodology to be developed to select the best configuration, based on the system dynamics. Two options have been analysed: fixed and floating support structure, with the floating option is here analysed. The design space has been investigated, ranking the possible options using a multi-criteria decision making (MCDM) method called TOPSIS. Based on this, two configurations have been promoted to the next analysis stage: a barge and a semisubmersible. The evolution of the configuration designs, necessary to optimise and compare these two options, is here presented, taking their dynamics and costs into account. The barge concept evolved to the 'triple doughnut-Miyagawa' concept, consisting of an annular cylindrical shape with an inner (to control the damping) and outer (to control added mass) bottom flat plates. The semisubmersible was optimised to obtain the best trade-off between dynamic behaviour and amount of material needed. The main conclusion is that, in general, the requirement driving the design is a good dynamic response to waves. If only basic requirements were taken into account (ability to float and ability to counteract the wind turbine inclining moment), a much smaller, lighter, and cheaper structure would fulfil them.

Original languageEnglish
Title of host publicationASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2012
Pages637-648
Number of pages12
Volume7
DOIs
Publication statusPublished - 1 Dec 2012
EventASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2012 - Rio de Janeiro, Brazil
Duration: 1 Jul 20126 Jul 2012

Conference

ConferenceASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2012
CountryBrazil
CityRio de Janeiro
Period1/07/126/07/12

    Fingerprint

Keywords

  • NOVA Wind Turbine
  • floating support structures
  • offshore wind turbines
  • vertical axis wind turbines

Cite this

Collu, M., Brennan, F. P., & Patel, M. H. (2012). NOVA project: lessons learnt during the conceptual phase of the design of a floating support structure for an offshore vertical axis wind turbine. In ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2012 (Vol. 7, pp. 637-648) https://doi.org/10.1115/OMAE2012-84232