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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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    Cited by:

    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. 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.
    7. 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.
    8. 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.
    9. 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.
    10. 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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