Sensitivity of OWC performance to air compressibility

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dc.contributor.authorLópez, Iván
dc.contributor.authorCarballo, Rodrigo
dc.contributor.authorTaveira-Pinto, Francisco
dc.contributor.authorIglesias, Gregorio
dc.contributor.funderConsellería de Cultura, Educación e Ordenación Universitaria, Xunta de Galiciaen
dc.contributor.funderFP7 People: Marie-Curie Actionsen
dc.date.accessioned2019-07-12T11:50:48Z
dc.date.available2019-07-12T11:50:48Z
dc.date.issued2019-06-20
dc.date.updated2019-07-12T11:42:41Z
dc.description.abstractAir compressibility is often neglected in experimental work due to practical difficulties, even though it is known to affect the performance of OWC wave energy converters. The key question, of course, is to what extent. In this work the impact of air compressibility on the capture width ratio is thoroughly quantified by means of a comprehensive experimental campaign, with no fewer than 330 tests encompassing a wide range of wave conditions and levels of turbine-induced damping, and two experimental set-ups: one designed to account for air compressibility, the other to neglect it. This approach is complemented with the use of the RANS-based CFD model OpenFOAM® to calibrate the pressure-vs-flowrate curves, which enables the flowrate to be determined based on the pressure drop measurements from the physical model. We find that the errors that derive from disregarding air compressibility may lead to either under- or over-predictions of power output, and are highly dependent on the operating conditions, more specifically the wave conditions (sea state) and turbine-induced damping.en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationLópez, I., Carballo, R., Taveira-Pinto, F. and Iglesias, G. (2019) 'Sensitivity of OWC performance to air compressibility', Renewable Energy, 145, pp. 1334-1347. doi: 10.1016/j.renene.2019.06.076en
dc.identifier.doi10.1016/j.renene.2019.06.076en
dc.identifier.endpage1347en
dc.identifier.issn0960-1481
dc.identifier.issn1879-0682
dc.identifier.journaltitleRenewable Energyen
dc.identifier.startpage1334en
dc.identifier.urihttps://hdl.handle.net/10468/8154
dc.identifier.volume145en
dc.language.isoenen
dc.publisherElsevier Ltd.en
dc.relation.projectinfo:eu-repo/grantAgreement/EC/FP7::SP3::PEOPLE/618556/EU/Wave Farm Impacts and Design/WAVEIMPACTen
dc.relation.urihttp://www.sciencedirect.com/science/article/pii/S0960148119309048
dc.rights© 2019, Elsevier Ltd. All rights reserved. This manuscript version is made available under the CC BY-NC-ND 4.0 license.en
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectWave energyen
dc.subjectWave poweren
dc.subjectOscillating water columnen
dc.subjectPhysical modellingen
dc.subjectCFDen
dc.subjectCapture-width ratioen
dc.titleSensitivity of OWC performance to air compressibilityen
dc.typeArticle (peer-reviewed)en
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