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Experimental investigation on the power capture of an oscillating wave surge converter in unidirectional waves

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  • Brito, Moisés
  • Ferreira, Rui M.L.
  • Teixeira, Luis
  • Neves, Maria G.
  • Canelas, Ricardo B.

Abstract

The aim of this paper is the experimental characterization of the capture width ratio (CWR) and response amplitude operator (RAO) of a 1:10 physical model of an oscillating wave surge converter (OWSC), under unidirectional regular and irregular waves. The effects of hydraulic power take-off (PTO) system are explicitly taken in consideration. A mathematical model is proposed to describe the PTO damping as a function of the angular velocity of the flap. The harmonic decomposition of free-surface elevation, angular velocity of the flap and pressure in the PTO system demonstrates that these signals are dominated by their linear component. However, the signals also present some important higher-order frequency components. To predict the CWR of the OWSC under irregular waves the nonlinear output frequency response functions are considered as the extension of the RAO to the nonlinear case. It is shown and discussed that the PTO system, wave frequency and height have a significant influence on the CWR and RAO. The RAO curve for irregular waves does not exhibit a well-defined peak, showing a limited variation in a broadband. A weak correlation between CWR and RAO was found, i.e., the maximum CWR does not occur for the maximum value of RAO.

Suggested Citation

  • Brito, Moisés & Ferreira, Rui M.L. & Teixeira, Luis & Neves, Maria G. & Canelas, Ricardo B., 2020. "Experimental investigation on the power capture of an oscillating wave surge converter in unidirectional waves," Renewable Energy, Elsevier, vol. 151(C), pages 975-992.
    • Handle: RePEc:eee:renene:v:151:y:2020:i:c:p:975-992
    DOI: 10.1016/j.renene.2019.11.094
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    References listed on IDEAS

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    1. Henry, Alan & Folley, Matt & Whittaker, Trevor, 2018. "A conceptual model of the hydrodynamics of an oscillating wave surge converter," Renewable Energy, Elsevier, vol. 118(C), pages 965-972.
    2. Stansby, P. & Carpintero Moreno, E. & Stallard, T. & Maggi, A., 2015. "Three-float broad-band resonant line absorber with surge for wave energy conversion," Renewable Energy, Elsevier, vol. 78(C), pages 132-140.
    3. Alonso, Rodrigo & Solari, Sebastián & Teixeira, Luis, 2015. "Wave energy resource assessment in Uruguay," Energy, Elsevier, vol. 93(P1), pages 683-696.
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    Cited by:

    1. Liu, Yao & Mizutani, Norimi & Cho, Yong-Hwan & Nakamura, Tomoaki, 2022. "Performance enhancement of a bottom-hinged oscillating wave surge converter via resonant adjustment," Renewable Energy, Elsevier, vol. 201(P1), pages 624-635.
    2. Amini, Erfan & Mehdipour, Hossein & Faraggiana, Emilio & Golbaz, Danial & Mozaffari, Sevda & Bracco, Giovanni & Neshat, Mehdi, 2022. "Optimization of hydraulic power take-off system settings for point absorber wave energy converter," Renewable Energy, Elsevier, vol. 194(C), pages 938-954.
    3. Mohd Afifi Jusoh & Mohd Zamri Ibrahim & Muhamad Zalani Daud & Zulkifli Mohd Yusop & Aliashim Albani, 2020. "An Estimation of Hydraulic Power Take-off Unit Parameters for Wave Energy Converter Device Using Non-Evolutionary NLPQL and Evolutionary GA Approaches," Energies, MDPI, vol. 14(1), pages 1-26, December.
    4. Choiniere, Michael & Davis, Jacob & Nguyen, Nhu & Tom, Nathan & Fowler, Matthew & Thiagarajan, Krish, 2022. "Hydrodynamics and load shedding behavior of a variable-geometry oscillating surge wave energy converter (OSWEC)," Renewable Energy, Elsevier, vol. 194(C), pages 875-884.
    5. Cheng, Yong & Li, Gen & Ji, Chunyan & Fan, Tianhui & Zhai, Gangjun, 2020. "Fully nonlinear investigations on performance of an OWSC (oscillating wave surge converter) in 3D (three-dimensional) open water," Energy, Elsevier, vol. 210(C).
    6. Milad Shadman & Mateo Roldan-Carvajal & Fabian G. Pierart & Pablo Alejandro Haim & Rodrigo Alonso & Corbiniano Silva & Andrés F. Osorio & Nathalie Almonacid & Griselda Carreras & Mojtaba Maali Amiri &, 2023. "A Review of Offshore Renewable Energy in South America: Current Status and Future Perspectives," Sustainability, MDPI, vol. 15(2), pages 1-34, January.

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