Experimental study on the hydrodynamic performance of an innovative floating dual-chamber oscillating water column
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Abstract
A comprehensive experimental study investigates the efficiency of a newly devised concept of a Floating dual-chamber Oscillating Water Column Wave Energy Converter device. Built upon the previous design of Rezanejad and Guedes Soares (2021), substantial geometrical improvements have been made to enhance its hydrodynamic performance. The study examines the influence of Power Take-Off damping and wave characteristics on its hydrodynamic performance. The experimental results demonstrate a significant increase in hydrodynamic performance across a wide range of sea states compared to the previously designed floating dual-chamber Oscillating Water Column device. Specifically, the new system exhibits an average hydrodynamic performance of 61% in all sea states, representing a 49% improvement over the efficiency of the previous design. Additionally, the research highlights that the device's fore and rear chambers play a dominant role in absorbing wave energy within specific wave period ranges, with their mutual interactions significantly enhancing the overall hydrodynamic performance. This substantial improvement in efficiency underscores the potential of the newly devised device for wave energy conversion applications.
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Rezanejad, K., Anastas, G., Hashemzadeh, M., Gadelho, J.F.M., López, I., Carballo, R., Guedes Soares, C., 2025. Experimental study on the hydrodynamic performance of an innovative floating dual-chamber oscillating water column. Ocean Engineering 323, 120549. https://doi.org/10.1016/j.oceaneng.2025.120549
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https://doi.org/10.1016/j.oceaneng.2025.120549Sponsors
This research and development work was funded by the European Union in the frame of European Innovation Council and SMEs Executive Agency (EISMEA) under the Women TechEU programme, awarded to Frenesim Das Ondas LDA (Wave To Energy™) for the "GreenH2Wave" project (Project ID 101113993). We gratefully acknowledge this financial support. The CENTEC team also acknowledges the funding from the Strategic Research Plan of the Centre for Marine Technology and Ocean Engineering (CENTEC), financed by the Portuguese Foundation for Science and Technology (FCT) under contract UIDB/UIDP/00134/2020. The experimental work was conducted in the wave flume of the Hydraulics Laboratory at Escuela Politécnica Superior de Enxeñaría (EPSE) of Universidade de Santiago de Compostela (USC), under research contract 2024-CP020.
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Attribution-NonCommercial-NoDerivatives 4.0 International