Power extraction in regular and random waves from an OWC in hybrid wind-wave energy systems

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dc.contributor.author Michele, S.
dc.contributor.author Renzi, E.
dc.contributor.author Perez-Collazo, C.
dc.contributor.author Greaves, D.
dc.contributor.author Iglesias, Gregorio
dc.date.accessioned 2019-10-09T14:24:20Z
dc.date.available 2019-10-09T14:24:20Z
dc.date.issued 2019-10-03
dc.identifier.citation Michele, S., Renzi, E., Perez-Collazo, C., Greaves, D. and Iglesias, G. (2019) 'Power extraction in regular and random waves from an OWC in hybrid wind-wave energy systems', Ocean Engineering, 191, 106519 (13 pp). doi: 10.1016/j.oceaneng.2019.106519 en
dc.identifier.volume 191 en
dc.identifier.startpage 1 en
dc.identifier.endpage 13 en
dc.identifier.issn 0029-8018
dc.identifier.uri http://hdl.handle.net/10468/8736
dc.identifier.doi 10.1016/j.oceaneng.2019.106519 en
dc.description.abstract A mathematical model is developed to analyse the hydrodynamics of a novel oscillating water column (OWC) in a hybrid wind-wave energy system. The OWC has a coaxial cylindrical structure in which the internal cylinder represents the mono-pile of an offshore wind turbine while the external cylinder has a skirt whose scope is to guide the wave energy flux inside the chamber. This layout is not casual, but consistent with the current approach to harnessing wave energy through hybrid systems. The device shape is rather complex and the boundary value problem is solved by applying the matching-method of eigenfunctions. Within the framework of a linearised theory, we model the turbine damping effects by assuming the airflow to be proportional to the air chamber pressure. Consequently, the velocity potential can be decomposed into radiation and diffraction problems. We study the effects of both skirt and internal radius dimensions on the power extraction efficiency for monochromatic and random waves. We show that the skirt has strong effects on the global behaviour, while the internal cylinder affects the values of the sloshing eigenfrequencies. Finally, we validate the analytical model with laboratory data and show a good agreement between analytical and experimental results. en
dc.description.sponsorship Royal Society — CNR International Fellowship (Grant NF170771) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Elsevier en
dc.relation.uri http://www.sciencedirect.com/science/article/pii/S0029801819306572
dc.rights © 2019, Elsevier Ltd. All rights reserved. This manuscript version is made available under the CC BY-NC-ND 4.0 licence. en
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/4.0/ en
dc.subject Wave energy en
dc.subject Oscillating water column en
dc.subject Wave–structure interactions en
dc.title Power extraction in regular and random waves from an OWC in hybrid wind-wave energy systems en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Jose Gregorio Iglesias Rodriguez, School Of Enginering Office, University College Cork, Cork, Ireland. +353-21-490-3000 Email: gregorio.iglesias@ucc.ie en
dc.internal.availability Full text available en
dc.check.info Access to this article is restricted until 24 months after publication by request of the publisher. en
dc.check.date 2021-10-03
dc.date.updated 2019-10-09T13:58:56Z
dc.description.version Accepted Version en
dc.internal.rssid 499780154
dc.contributor.funder Royal Society en
dc.contributor.funder Consiglio Nazionale delle Ricerche en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Ocean Engineering en
dc.internal.copyrightchecked No
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress gregorio.iglesias@ucc.ie en
dc.identifier.articleid 106519 en


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© 2019, Elsevier Ltd. All rights reserved. This manuscript version is made available under the CC BY-NC-ND 4.0 licence. Except where otherwise noted, this item's license is described as © 2019, Elsevier Ltd. All rights reserved. This manuscript version is made available under the CC BY-NC-ND 4.0 licence.
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