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Three-float broad-band resonant line absorber with surge for wave energy conversion

Author

Listed:
  • Stansby, P.
  • Carpintero Moreno, E.
  • Stallard, T.
  • Maggi, A.

Abstract

A line absorber consisting of three cylindrical floats is shown to have high crest capture widths for wave energy conversion across a broad band of frequencies. The bow, mid and stern floats are small, medium and large respectively; the floats are spaced about half a wavelength apart so that forces and motion of adjacent floats are substantially in anti-phase. The bow and mid float are rigidly connected by a beam and a beam from the stern float is connected to a hinge above the mid float for power take off. The draft of the stern float enables heave resonance at a prominent wave frequency and the smaller draft of the mid float provides resonance at a somewhat lower frequency. Experimental results at about 1:8 scale show capture widths greater than 25% of a wavelength in regular waves and greater than 20% of a wavelength in irregular waves across a broad range of wave periods. A time-stepping model for regular waves with coefficients from linear diffraction theory showed similar power prediction with a generic drag coefficient of 1.8. The model shows the importance of surge forcing and heave resonance. The model also shows that reducing drag coefficient will increase capture width.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:renene:v:78:y:2015:i:c:p:132-140
    DOI: 10.1016/j.renene.2014.12.057
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    References listed on IDEAS

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    1. McCabe, A.P. & Bradshaw, A. & Meadowcroft, J.A.C. & Aggidis, G., 2006. "Developments in the design of the PS Frog Mk 5 wave energy converter," Renewable Energy, Elsevier, vol. 31(2), pages 141-151.
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    1. Liu, Changhai & Hu, Min & Gao, Wenzhi & Chen, Jian & Zeng, Yishan & Wei, Daozhu & Yang, Qingjun & Bao, Gang, 2021. "A high-precise model for the hydraulic power take-off of a raft-type wave energy converter," Energy, Elsevier, vol. 215(PA).
    2. Carpintero Moreno, Efrain & Stansby, Peter, 2019. "The 6-float wave energy converter M4: Ocean basin tests giving capture width, response and energy yield for several sites," Renewable and Sustainable Energy Reviews, Elsevier, vol. 104(C), pages 307-318.
    3. Ma, Yong & Zhang, Aiming & Yang, Lele & Li, Hao & Zhai, Zhenfeng & Zhou, Heng, 2020. "Motion simulation and performance analysis of two-body floating point absorber wave energy converter," Renewable Energy, Elsevier, vol. 157(C), pages 353-367.
    4. Fernando Jaramillo-Lopez & Brian Flannery & Jimmy Murphy & John V. Ringwood, 2020. "Modelling of a Three-Body Hinge-Barge Wave Energy Device Using System Identification Techniques," Energies, MDPI, vol. 13(19), pages 1-16, October.
    5. Santo, H. & Taylor, P.H. & Stansby, P.K., 2020. "The performance of the three-float M4 wave energy converter off Albany, on the south coast of western Australia, compared to Orkney (EMEC) in the U.K," Renewable Energy, Elsevier, vol. 146(C), pages 444-459.
    6. Gu, Hanbin & Stansby, Peter & Zhang, Zhaode & Zhu, Gancheng & Lin, Pengzhi & Shi, Huabin, 2023. "Research and concept design of wave energy converter on ocean squid jigging ship," Energy, Elsevier, vol. 285(C).
    7. Santo, H. & Taylor, P.H. & Eatock Taylor, R. & Stansby, P., 2016. "Decadal variability of wave power production in the North-East Atlantic and North Sea for the M4 machine," Renewable Energy, Elsevier, vol. 91(C), pages 442-450.
    8. Orszaghova, J. & Lemoine, S. & Santo, H. & Taylor, P.H. & Kurniawan, A. & McGrath, N. & Zhao, W. & Cuttler, M.V.W., 2022. "Variability of wave power production of the M4 machine at two energetic open ocean locations: Off Albany, Western Australia and at EMEC, Orkney, UK," Renewable Energy, Elsevier, vol. 197(C), pages 417-431.
    9. He, Guanghua & Luan, Zhengxiao & Zhang, Wei & He, Runhua & Liu, Chaogang & Yang, Kaibo & Yang, Changhao & Jing, Penglin & Zhang, Zhigang, 2023. "Review on research approaches for multi-point absorber wave energy converters," Renewable Energy, Elsevier, vol. 218(C).
    10. Kara, Fuat, 2016. "Time domain prediction of power absorption from ocean waves with wave energy converter arrays," Renewable Energy, Elsevier, vol. 92(C), pages 30-46.
    11. Galván-Pozos, D.E. & Ocampo-Torres, F.J., 2020. "Dynamic analysis of a six-degree of freedom wave energy converter based on the concept of the Stewart-Gough platform," Renewable Energy, Elsevier, vol. 146(C), pages 1051-1061.
    12. 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.

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