Non-isentropic study of a closed-circuit oscillating-water-column wave energy converter

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dc.check.date2021-11-19
dc.check.infoAccess to this article is restricted until 24 months after publication by request of the publisher.en
dc.contributor.authorBenreguig, Pierre
dc.contributor.authorVicente, Miguel
dc.contributor.authorCrowley, Sarah
dc.contributor.authorMurphy, Jimmy
dc.contributor.funderHorizon 2020en
dc.date.accessioned2020-01-29T11:57:49Z
dc.date.available2020-01-29T11:57:49Z
dc.date.issued2019-11-19
dc.date.updated2020-01-29T11:50:50Z
dc.description.abstractThe thermodynamics of the air inside a conventional Oscillating Water Column (OWC) is commonly modelled using the isentropic relationship between pressure and density. The innovative Tupperwave device is based on the OWC concept but uses non-return valves and two extra reservoirs to rectify the flow into a smooth unidirectional air flow harnessed by a unidirectional turbine. The air, flowing in closed-circuit, experiences a temperature increase due to viscous losses across the valves and turbine along the repetitive cycles of the device's operation. In order to study this temperature increase which represents a potential issue for the device operation, a non-isentropic wave-to-wire model of the Tupperwave device is developed taking into account the irreversible thermodynamic processes. The model is based on the First Law of Thermodynamics, and accounts for viscous losses at the valves and turbine as well as solar radiation and heat transfer across the device walls and inner free-surface. The results reveal that the temperature increase in the device remains harmless for its operation. The difference between the power performance of the Tupperwave device based on the non-isentropic and isentropic models is found to be relatively small. Its performance are also compared to the corresponding conventional OWC device.en
dc.description.sponsorshipHorizon 2020 (OCEANERA-NET European Network OCN/00028)en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid106700en
dc.identifier.citationBenreguig, P., Vicente, M., Crowley, S. and Murphy, J. (2020) 'Non-isentropic study of a closed-circuit oscillating-water-column wave energy converter', Ocean Engineering, 195, 106700 (14pp). doi: 10.1016/j.oceaneng.2019.106700en
dc.identifier.doi10.1016/j.oceaneng.2019.106700en
dc.identifier.endpage14en
dc.identifier.issn0029-8018
dc.identifier.journaltitleOcean Engineeringen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/9580
dc.identifier.volume195en
dc.language.isoenen
dc.publisherElsevier Ltd.en
dc.relation.urihttp://www.sciencedirect.com/science/article/pii/S0029801819308157
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.subjectOscillating water columnen
dc.subjectNon-isentropic studyen
dc.subjectTupperwaveen
dc.subjectEnergy balanceen
dc.subjectValvesen
dc.titleNon-isentropic study of a closed-circuit oscillating-water-column wave energy converteren
dc.typeArticle (peer-reviewed)en
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