RT Journal Article
T1 Non-linear turbine selection for an OWC wave energy converter
A1 López Moreira, Iván
A1 Carballo Sánchez, Rodrigo
A1 Fouz, David Mateo
A1 Iglesias, Gregorio
K1 oscillating water column
K1 OWC
K1 turbine-induced damping
K1 turbine dimensioning
K1 physical modelling
K1 numerical modelling
AB Turbine-induced damping is a critical parameter affecting the performance of oscillating water column (OWC) wave energy converters. Therefore, selecting the appropriate turbine-chamber combination is an essential step in their design. In this work, a methodology is developed to determine the optimum turbine diameter for a given chamber, i.e., the diameter which maximizes the pneumatic energy capture of the chamber under an extensive set of wave conditions—covering virtually the entire range of wave conditions relevant for wave energy exploitation. This novel approach combines physical and numerical modelling with dimensional analysis. Importantly, it results in a turbine diameter that enables the turbine to operate at maximum efficiency. Through the different modelling techniques applied, the methodology accounts for air compressibility effects and other non-linear effects. It is applicable to non-linear turbines, with the study focusing on the promising biradial turbine. The results indicate that using the proposed methodology to select the turbine diameter significantly improves the capture-width ratio of the OWC, with increases of up to 100% for individual sea states. Two turbine diameters were identified as appropriate for the proposed OWC chamber design, 1.1 m for low-energy sites, and 1.4 m for mid- and high-energy sites.
PB Elsevier
SN 0029-8018
YR 2024
FD 2024-11-01
LK http://hdl.handle.net/10347/34832
UL http://hdl.handle.net/10347/34832
LA eng
NO I. López, R. Carballo, D.M. Fouz, G. Iglesias, Non-linear turbine selection for an OWC wave energy converter, Ocean Engineering, Volume 311, 2024, 118877, ISSN 0029-8018, https://doi.org/10.1016/j.oceaneng.2024.118877
NO This research was funded by the PORTOS project—Ports Towards Energy Self-Sufficiency—reference number EAPA_784/2018, co-financed by the Interreg Atlantic Area Program through the European Regional Development Fund and ‘Axudas para a consolidación e estruturación de unidades de investigación competitivas nas universidades do Sistema Universitario de Galicia 2023’ with reference number ED431B 2023/17. During this work D.M. Fouz was supported by a predoctoral grant of the ‘Convocatoria de contratos predoutorais do Campus de Especialización Campus Terra’ with reference number 8042-272B-64100. The numerical model simulations have been performed on the FinisTerrae II supercomputer at the ‘Centro de Supercomputación de Galicia (CESGA)’.
DS Minerva
RD 23 abr 2026