Performance improvements of mooring systems for wave energy converters

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dc.contributor.authorCasaubieilh, Pierre
dc.contributor.authorThiebaut, Florent
dc.contributor.authorBosma, Bret
dc.contributor.authorRetzler, C.
dc.contributor.authorShaw, M.
dc.contributor.authorLetertre, Y.
dc.contributor.authorSheng, Wanan
dc.contributor.funderEuropean Commissionen
dc.date.accessioned2016-06-03T09:20:58Z
dc.date.available2016-06-03T09:20:58Z
dc.date.issued2014-11
dc.date.updated2015-01-20T15:26:18Z
dc.description.abstractIn the development of wave energy converters, the mooring system is a key component for a safe station-keeping and an important factor in the cost of the wave energy production. Generally, when designing a mooring system for a wave energy converter, two important conditions must be considered: (i) that the mooring system must be strong enough to limit the drifting motions, even in extreme waves, tidal and wind conditions and (ii) it must be compliant enough so that the impact on wave energy production can be minimised. It is frequently found that these two conditions are contradictory. The existing solutions mainly include the use of heavy chains, which create a catenary shaped mooring configuration, allowing limited flexibility within the mooring system, and hence very large forces may still be present on mooring lines and thus on anchors. This solution is normally quite expensive if the costs of the materials and installation are included. This paper presents a new solution to the mooring system for wave energy converters within the FP7 project, ‘GeoWAVE’, which is a project aiming to develop a new generation of the moorings system for minimising the loads on mooring lines and anchors, the impact on the device motions for power conversion, and the footprint if it is applicable, and meanwhile the new types of anchors are also addressed within the project. However this paper will focus on the new mooring system by presenting the wave tank test results of the Pelamis wave energy converter model and the new developed mooring system. It can be seen that the new generation of mooring system can significantly reduce the loads on mooring lines and anchors, and reduce the device excursions as a result of the new mooring system when compare to the conventional catenary mooring.en
dc.description.sponsorshipEuropean Commission (EU Seventh Framework Programme (FP7/2007-2013) under grant agreement n° 287056, titled "Geotechnical design solutions for the offshore renewable wave energy industry (GeoWAVE))en
dc.description.statusNot peer revieweden
dc.description.urihttp://www.centec.tecnico.ulisboa.pt/renew2014/general_info.aspxen
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationCasaubieilh, P., Thiebaut, F., Bosma, B., Retzler, C., Shaw, M., Letertre, Y. and Sheng, W.(2014) ‘Performance improvements of mooring systems for wave energy converters’, Renew 2014: 1st International Conference on Renewable Energies Offshore. Lisbon, Portugal, 24 - 26 November.en
dc.identifier.urihttps://hdl.handle.net/10468/2686
dc.language.isoenen
dc.relation.ispartofRenew 2014
dc.rights© 2014, the authorsen
dc.rights.holder© 2014, the authors.en
dc.subjectWave energy convertersen
dc.subjectMooring systemsen
dc.subjectWave energy productionen
dc.subjectGeoWAVEen
dc.subjectCatenary mooringen
dc.subjectPelamis wave energy converter modelen
dc.titlePerformance improvements of mooring systems for wave energy convertersen
dc.typeConference itemen
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