Hydrodynamic performance of a pile-supported OWC breakwater: an analytical study

dc.check.date2021-04-25
dc.check.infoAccess to this article is restricted until 24 months after publication by request of the publisher.en
dc.contributor.authorHe, Fang
dc.contributor.authorZhang, Huashan
dc.contributor.authorZhao, Jiajun
dc.contributor.authorZheng, Siming
dc.contributor.authorIglesias, Gregorio
dc.contributor.funderNational Natural Science Foundation of Chinaen
dc.contributor.funderNatural Science Foundation of Zhejiang Provinceen
dc.contributor.funderZhejiang Universityen
dc.contributor.funderEuropean Commissionen
dc.date.accessioned2019-06-05T09:23:48Z
dc.date.available2019-06-05T09:23:48Z
dc.date.issued2019-04-25
dc.date.updated2019-06-05T09:00:04Z
dc.description.abstractA pile-supported OWC breakwater is a novel marine structure in which an oscillating water column (OWC) is integrated into a pile-supported breakwater, with a dual function: generating carbon-free energy and providing shelter for port activities by limiting wave transmission. In this work we investigate the hydrodynamics of this novel structure by means of an analytical model based on linear wave theory and matched eigenfunction expansion method. A local increase in the back-wall draft is adopted as an effective strategy to enhance wave power extraction and reduce wave transmission. The effects of chamber breadth, wall draft and air chamber volume on the hydrodynamic performance are examined in detail. We find that optimizing power take-off (PTO) damping for maximum power leads to both satisfactory power extraction and wave transmission, whereas optimizing for minimum wave transmission penalizes power extraction excessively; the former is, therefore, preferable. An appropriate large enough air chamber volume can enhance the bandwidth of high extraction efficiency through the air compressibility effect, with minimum repercussions for wave transmission. Meanwhile, the air chamber volume is found to be not large enough for the air compressibility effect to be relevant at engineering scales. Finally, a two-level practical optimization strategy on PTO damping is adopted. We prove that this strategy yields similar wave power extraction and wave transmission as the ideal optimization approach.en
dc.description.sponsorshipNational Natural Science Foundation of China (No. 51609211); Natural Science Foundation of Zhejiang Province (No. LY19E090007); Zhejiang University - Zhoushan Joint Project (No. 2017C82226); European Commission (INTERREG V Intelligent Community Energy Project (ICE) (No. 5025))en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationHe, F., Zhang, H., Zhao, J., Zheng, S. and Iglesias, G. (2019) 'Hydrodynamic performance of a pile-supported OWC breakwater: an analytical study', Applied Ocean Research, 88, pp. 326-340. doi: 10.1016/j.apor.2019.03.022en
dc.identifier.doi10.1016/j.apor.2019.03.022en
dc.identifier.endpage340en
dc.identifier.issn0141-1187
dc.identifier.journaltitleApplied Ocean Researchen
dc.identifier.startpage326en
dc.identifier.urihttps://hdl.handle.net/10468/8015
dc.identifier.volume88en
dc.language.isoenen
dc.publisherElsevier Ltd.en
dc.relation.urihttp://www.sciencedirect.com/science/article/pii/S0141118719300719
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.subjectOscillating water columnen
dc.subjectWave energy converteren
dc.subjectWave transmissionen
dc.subjectWave poweren
dc.subjectAir compressibilityen
dc.subjectOptimizationen
dc.titleHydrodynamic performance of a pile-supported OWC breakwater: an analytical studyen
dc.typeArticle (peer-reviewed)en
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