Use of a wave energy converter as a motion suppression device for floating wind turbines

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Floating offshore wind turbines (FOWTs) are subjected to large amplitude motions that induce greater loads on components and reduce aerodynamic performance. One approach to counteract this has been to use passive damping systems for FOWTs to dissipate the wave-induced energy and therefore reduce the global platform motions. This paper proposes that rather than discard this energy, a wave energy converter (WEC) is utilized on the floating platform to absorb it. A study is carried out on a floating vertical axis wind turbine (VAWT) combined with WEC moving in heave. A range of damping and stiffness coefficients are applied between the FOWT and WEC to establish strategies for two cases: maximum motion reduction and maximum energy extraction. The results and conclusions obtained are presented in terms of modifying the WEC natural frequency, damping and stiffness values.

LanguageEnglish
Pages223-233
Number of pages11
JournalEnergy Procedia
Volume35
DOIs
Publication statusPublished - 1 Jan 2013

Fingerprint

Wind turbines
Offshore wind turbines
Damping
Stiffness
Natural frequencies
Aerodynamics

Keywords

  • floating wind turbine
  • motion suppression
  • offshore
  • VAWT
  • wave energy converter

Cite this

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title = "Use of a wave energy converter as a motion suppression device for floating wind turbines",
abstract = "Floating offshore wind turbines (FOWTs) are subjected to large amplitude motions that induce greater loads on components and reduce aerodynamic performance. One approach to counteract this has been to use passive damping systems for FOWTs to dissipate the wave-induced energy and therefore reduce the global platform motions. This paper proposes that rather than discard this energy, a wave energy converter (WEC) is utilized on the floating platform to absorb it. A study is carried out on a floating vertical axis wind turbine (VAWT) combined with WEC moving in heave. A range of damping and stiffness coefficients are applied between the FOWT and WEC to establish strategies for two cases: maximum motion reduction and maximum energy extraction. The results and conclusions obtained are presented in terms of modifying the WEC natural frequency, damping and stiffness values.",
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Use of a wave energy converter as a motion suppression device for floating wind turbines. / Borg, Michael; Collu, Maurizio; Brennan, Feargal P.

In: Energy Procedia, Vol. 35, 01.01.2013, p. 223-233.

Research output: Contribution to journalArticle

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AU - Collu, Maurizio

AU - Brennan, Feargal P.

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AB - Floating offshore wind turbines (FOWTs) are subjected to large amplitude motions that induce greater loads on components and reduce aerodynamic performance. One approach to counteract this has been to use passive damping systems for FOWTs to dissipate the wave-induced energy and therefore reduce the global platform motions. This paper proposes that rather than discard this energy, a wave energy converter (WEC) is utilized on the floating platform to absorb it. A study is carried out on a floating vertical axis wind turbine (VAWT) combined with WEC moving in heave. A range of damping and stiffness coefficients are applied between the FOWT and WEC to establish strategies for two cases: maximum motion reduction and maximum energy extraction. The results and conclusions obtained are presented in terms of modifying the WEC natural frequency, damping and stiffness values.

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