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dc.contributor.authorCheng, Zhengshun
dc.contributor.authorWang, Kai
dc.contributor.authorGao, Zhen
dc.contributor.authorMoan, Torgeir
dc.date.accessioned2017-10-16T08:46:38Z
dc.date.available2017-10-16T08:46:38Z
dc.date.created2016-08-31T13:13:45Z
dc.date.issued2017
dc.identifier.citationWind Energy. 2017, 20 (2), 305-323.nb_NO
dc.identifier.issn1095-4244
dc.identifier.urihttp://hdl.handle.net/11250/2460227
dc.description.abstractInterest in the exploitation of offshore wind resources using floating wind turbines has increased. Commercial development of floating horizontal axis wind turbines (FHAWTs) is emerging because of their commercial success in onshore and near-shore areas. Floating vertical axis wind turbines (FVAWTs) are also promising because of their low installation and maintenance costs. Therefore, a comparative study on the dynamic responses of FHAWTs and FVAWTs is of great interest. In the present study, a FHAWT employing the 5MW wind turbine developed by the National Renewable Energy Laboratory (NREL) and a FVAWT employing a Darrieus rotor, both mounted on the OC3 spar buoy, were considered. An improved control strategy was introduced for FVAWTs to achieve an approximately constant mean generator power for the above rated wind speeds. Fully coupled time domain simulations were carried out using identical, directional aligned and correlated wind and wave conditions. Because of different aerodynamic load characteristics and control strategies, the FVAWT results in larger mean tower base bending moments and mooring line tensions above the rated wind speed. Because significant two-per-revolution aerodynamic loads act on the FVAWT, the generator power, tower base bending moments and delta line tensions show prominent two-per-revolution variation. Consequently, the FVAWT suffers from severe fatigue damage at the tower bottom. However, the dynamic performance of the FVAWT could be improved by increasing the number of blades, using helical blades or employing a more advanced control strategy, which requires additional research.nb_NO
dc.language.isoengnb_NO
dc.publisherWileynb_NO
dc.titleA comparative study on dynamic responses of spar-type floating horizontal and vertical axis wind turbinesnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.source.pagenumber305-323nb_NO
dc.source.volume20nb_NO
dc.source.journalWind Energynb_NO
dc.source.issue2nb_NO
dc.identifier.doi10.1002/we.2007
dc.identifier.cristin1376938
dc.relation.projectEU/309395nb_NO
dc.relation.projectNorges forskningsråd: 223254nb_NO
dc.description.localcodeThis is the peer reviewed version of the following article: A comparative study on dynamic responses of spar-type floating horizontal and vertical axis wind turbines, which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/we.2007/full. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.nb_NO
cristin.unitcode194,64,20,0
cristin.unitnameInstitutt for marin teknikk
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode2


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