Modelling air compressibility in OWC devices with deformable air chambers

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dc.contributor.authorBenreguig, Pierre
dc.contributor.authorMurphy, Jimmy
dc.contributor.funderHorizon 2020en
dc.date.accessioned2019-10-01T08:47:39Z
dc.date.available2019-10-01T08:47:39Z
dc.date.issued2019-08-11
dc.description.abstractAir compressibility effects play an important role in large-scale Oscillating Water Column (OWC) wave energy converters. Air compressibility is however not scalable with Froude similarity law. An existing scaling method enables correctly reproducing the air compressibility at the model scale, but its implementation is effortful and becomes cumbersome for floating devices and tests at relatively large scales (1/15th–1/2th). Air compressibility is therefore commonly ignored in model-scale tank testing of conventional OWC devices, which can lead to substantially unrealistic results on the device performance relative to the full-scale device. In the case of the Tupperwave device, which is a closed circuit OWC device, correctly modelling air compressibility during tank testing is however essential because the device relies on air compressibility to work. In this paper, a new method for modelling air compressibility at the model scale is presented. The method uses variable volume chambers, which mimic air compressibility by storing energy under the form of strain energy. This method reduces the difficulties of implementation and enhances the application of the existing method to larger scales. Various applications to this method are identified and described, including the presentation of a novel OWC concept.en
dc.description.sponsorshipOCEANERA-NET European Network (OCN/00028)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid268en
dc.identifier.citationBenreguig, P. and Murphy, J. (2019) 'Modelling Air Compressibility in OWC Devices with Deformable Air Chambers', Journal of Marine Science and Engineering, 7(8), 268 (13pp). DOI: 10.3390/jmse7080268en
dc.identifier.doi10.3390/jmse7080268en
dc.identifier.endpage13en
dc.identifier.issn2077-1312
dc.identifier.issued8en
dc.identifier.journaltitleJournal of Marine Science Engineeringen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/8650
dc.identifier.volume7en
dc.language.isoenen
dc.publisherMDPIen
dc.relation.projectinfo:eu-repo/grantAgreement/EC/H2020::ERA-NET-Cofund/731200/EU/Ocean Energy ERA-NET Cofund/OCEANERA-NET COFUNDen
dc.relation.projectinfo:eu-repo/grantAgreement/EC/FP7::SP1::ENERGY/618099/EU/The coordination of national research activities of Member States and Associated States in the field of Ocean Energy (ERA-NET)/OCEANERA-NETen
dc.relation.urihttps://www.mdpi.com/2077-1312/7/8/268/htm
dc.rights© The Author(s) 2019. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly citeden
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subjectWave energyen
dc.subjectOscillating war columnen
dc.subjectAir compressibilityen
dc.subjectTank testingen
dc.subjectClosed-circuiten
dc.subjectNon-return valvesen
dc.subjectSpring-like effecten
dc.subjectDeformable chambersen
dc.titleModelling air compressibility in OWC devices with deformable air chambersen
dc.typeArticle (peer-reviewed)en
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