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

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dc.contributor.author He, Fang
dc.contributor.author Zhang, Huashan
dc.contributor.author Zhao, Jiajun
dc.contributor.author Zheng, Siming
dc.contributor.author Iglesias, Gregorio
dc.date.accessioned 2019-06-05T09:23:48Z
dc.date.available 2019-06-05T09:23:48Z
dc.date.issued 2019-04-25
dc.identifier.citation He, 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.2019.03.022 en
dc.identifier.volume 88 en
dc.identifier.startpage 326 en
dc.identifier.endpage 340 en
dc.identifier.issn 0141-1187
dc.identifier.uri http://hdl.handle.net/10468/8015
dc.identifier.doi 10.1016/j.apor.2019.03.022 en
dc.description.abstract A 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.sponsorship National 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.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Elsevier Ltd. en
dc.relation.uri http://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.uri https://creativecommons.org/licenses/by-nc-nd/4.0/ en
dc.subject Oscillating water column en
dc.subject Wave energy converter en
dc.subject Wave transmission en
dc.subject Wave power en
dc.subject Air compressibility en
dc.subject Optimization en
dc.title Hydrodynamic performance of a pile-supported OWC breakwater: an analytical study en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Jose Gregorio Iglesias Rodriguez, Engineering , 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 2021-04-25
dc.date.updated 2019-06-05T09:00:04Z
dc.description.version Accepted Version en
dc.internal.rssid 487882214
dc.contributor.funder National Natural Science Foundation of China en
dc.contributor.funder Natural Science Foundation of Zhejiang Province en
dc.contributor.funder Zhejiang University en
dc.contributor.funder European Commission en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Applied Ocean Research en
dc.internal.copyrightchecked Yes
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress gregorio.iglesias@ucc.ie 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 license. 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 license.
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