Wave-to-wire model development and validation for two OWC type wave energy converters

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dc.contributor.authorBenreguig, Pierre
dc.contributor.authorKelly, James
dc.contributor.authorPakrashi, Vikram
dc.contributor.authorMurphy, Jimmy
dc.contributor.funderEuropean Commissionen
dc.date.accessioned2019-12-09T12:28:18Z
dc.date.available2019-12-09T12:28:18Z
dc.date.issued2019-10-18
dc.description.abstractThe Tupperwave device is a closed-circuit oscillating water column (OWC) wave energy converter that uses non-return valves and two large fixed-volume accumulator chambers to create a smooth unidirectional air flow, harnessed by a unidirectional turbine. In this paper, the relevance of the Tupperwave concept against the conventional OWC concept, that uses a self-rectifying turbine, is investigated. For this purpose, wave-to-wire numerical models of the Tupperwave device and a corresponding conventional OWC device are developed and validated against experimental tests. Both devices have the same floating spar buoy structure and a similar turbine technology. The models include wave-structure hydrodynamic interaction, air turbines and generators, along with their control laws in order to encompass all power conversion stages from wave to electrical power. Hardware-in-the-loop is used to physically emulate the last power conversion stage from mechanic to electrical power and hence validate the control law and the generator numerical model. The dimensioning methodology for turbines and generators for power optimisation is explained. Eventually, the validated wave-to-wire numerical models of the conventional OWC and the Tupperwave device are used to assess and compare the performances of these two OWC type wave energy device concepts in the same wave climate. The benefits of pneumatic power smoothing by the Tupperwave device are discussed and the required efficiency of the non-return valves is investigated.en
dc.description.sponsorshipOCEANERA-NET European Network (OCN/00028)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid3977en
dc.identifier.citationBenreguig, P., Kelly, J., Pakrashi, V. and Murphy, J. (2019) 'Wave-to-Wire Model Development and Validation for Two OWC Type Wave Energy Converters', Energies, 12(20), 3977 (28pp). doi: 10.3390/en12203977en
dc.identifier.doi10.3390/en12203977en
dc.identifier.eissn1996-1073
dc.identifier.endpage28en
dc.identifier.issued20en
dc.identifier.journaltitleEnergiesen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/9364
dc.identifier.volume12en
dc.language.isoenen
dc.publisherMDPI AGen
dc.rights© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).en
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectWave energyen
dc.subjectOscillating water columnen
dc.subjectAir turbineen
dc.subjectValvesen
dc.subjectWave-to-wave modelen
dc.titleWave-to-wire model development and validation for two OWC type wave energy convertersen
dc.typeArticle (peer-reviewed)en
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