Influence of turbine damping on OWC wave-to-wire performance

Turbine-chamber coupling is a decisive factor in the performance of oscillating water column (OWC) wave energy converters. In this study, a wave-to-wire model is developed to evaluate the influence of turbine-induced damping on the different energy conversion stages—pneumatic, mechanical, and electr...

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Authors: López Moreira, Iván, Álvarez Fernández, Borja, Fouz, David Mateo, Carballo Sánchez, Rodrigo, Iglesias Rodríguez, José Gregorio
Format: article
Publication Date:2026
Country:España
Institution:Universidad de Santiago de Compostela (USC)
Repository:Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela
Language:English
OAI Identifier:oai:dnet:minerva_____::5355b360829480321af3ff7100c2c646
Online Access:https://hdl.handle.net/10347/47047
Access Level:Open access
Keyword:Oscillating water column
Turbine-induced damping
Turbine-chamber coupling
Physical modelling
Wave-to-wire modelling
Impulse turbine
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spelling Influence of turbine damping on OWC wave-to-wire performanceLópez Moreira, IvánÁlvarez Fernández, BorjaFouz, David MateoCarballo Sánchez, RodrigoIglesias Rodríguez, José GregorioOscillating water columnTurbine-induced dampingTurbine-chamber couplingPhysical modellingWave-to-wire modellingImpulse turbineTurbine-chamber coupling is a decisive factor in the performance of oscillating water column (OWC) wave energy converters. In this study, a wave-to-wire model is developed to evaluate the influence of turbine-induced damping on the different energy conversion stages—pneumatic, mechanical, and electrical—of an OWC equipped with a biradial turbine. The methodology combines: (i) high-resolution spectral modelling to characterize the nearshore wave energy resources at a study site in Galicia (NW Spain); (ii) physical (laboratory) and computational fluid dynamics (CFD) modelling of the OWC hydrodynamics accounting for air compressibility; and (iii) analytical modelling of the turbine–generator set, including a control law for rotational speed regulation. Results show that turbine-induced damping critically affects the performance of OWC devices across all energy conversion stages, with the optimal damping condition varying according to the stage considered. Mechanical efficiency emerges as a key factor, which can shift the optimal damping towards higher values than those indicated by the pneumatic efficiency alone. These findings underscore the importance of turbine efficiency in OWC design and highlight the need to integrate mechanical and electrical conversion stages into turbine-chamber coupling strategies to achieve optimal performance.ElsevierUniversidade de Santiago de Compostela. Departamento de Enxeñaría Agroforestal20262026-04-0120262026-04-01journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/10347/47047reponame:Minerva. Repositorio Institucional de la Universidad de Santiago de Compostelainstname:Universidad de Santiago de Compostela (USC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2© 2026 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license ( http://creativecommons.org/licenses/by/4.0/ ).http://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:dnet:minerva_____::5355b360829480321af3ff7100c2c6462026-06-15T12:47:27Z
dc.title.none.fl_str_mv Influence of turbine damping on OWC wave-to-wire performance
title Influence of turbine damping on OWC wave-to-wire performance
spellingShingle Influence of turbine damping on OWC wave-to-wire performance
López Moreira, Iván
Oscillating water column
Turbine-induced damping
Turbine-chamber coupling
Physical modelling
Wave-to-wire modelling
Impulse turbine
title_short Influence of turbine damping on OWC wave-to-wire performance
title_full Influence of turbine damping on OWC wave-to-wire performance
title_fullStr Influence of turbine damping on OWC wave-to-wire performance
title_full_unstemmed Influence of turbine damping on OWC wave-to-wire performance
title_sort Influence of turbine damping on OWC wave-to-wire performance
dc.creator.none.fl_str_mv López Moreira, Iván
Álvarez Fernández, Borja
Fouz, David Mateo
Carballo Sánchez, Rodrigo
Iglesias Rodríguez, José Gregorio
author López Moreira, Iván
author_facet López Moreira, Iván
Álvarez Fernández, Borja
Fouz, David Mateo
Carballo Sánchez, Rodrigo
Iglesias Rodríguez, José Gregorio
author_role author
author2 Álvarez Fernández, Borja
Fouz, David Mateo
Carballo Sánchez, Rodrigo
Iglesias Rodríguez, José Gregorio
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Universidade de Santiago de Compostela. Departamento de Enxeñaría Agroforestal
dc.subject.none.fl_str_mv Oscillating water column
Turbine-induced damping
Turbine-chamber coupling
Physical modelling
Wave-to-wire modelling
Impulse turbine
topic Oscillating water column
Turbine-induced damping
Turbine-chamber coupling
Physical modelling
Wave-to-wire modelling
Impulse turbine
description Turbine-chamber coupling is a decisive factor in the performance of oscillating water column (OWC) wave energy converters. In this study, a wave-to-wire model is developed to evaluate the influence of turbine-induced damping on the different energy conversion stages—pneumatic, mechanical, and electrical—of an OWC equipped with a biradial turbine. The methodology combines: (i) high-resolution spectral modelling to characterize the nearshore wave energy resources at a study site in Galicia (NW Spain); (ii) physical (laboratory) and computational fluid dynamics (CFD) modelling of the OWC hydrodynamics accounting for air compressibility; and (iii) analytical modelling of the turbine–generator set, including a control law for rotational speed regulation. Results show that turbine-induced damping critically affects the performance of OWC devices across all energy conversion stages, with the optimal damping condition varying according to the stage considered. Mechanical efficiency emerges as a key factor, which can shift the optimal damping towards higher values than those indicated by the pneumatic efficiency alone. These findings underscore the importance of turbine efficiency in OWC design and highlight the need to integrate mechanical and electrical conversion stages into turbine-chamber coupling strategies to achieve optimal performance.
publishDate 2026
dc.date.none.fl_str_mv 2026
2026-04-01
2026
2026-04-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/10347/47047
url https://hdl.handle.net/10347/47047
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
http://creativecommons.org/licenses/by/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela
instname:Universidad de Santiago de Compostela (USC)
instname_str Universidad de Santiago de Compostela (USC)
reponame_str Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela
collection Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,198674

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