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Mechanical design and modeling of a single-piston pump for the novel power take-off system of a wave energy converter

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  • Vakis, Antonis I.
  • Anagnostopoulos, John S.

Abstract

A multi-pump, multi-piston power take-off wave energy converter (MP2PTO WEC) has been proposed for use with a novel renewable energy harvester termed the Ocean Grazer. The MP2PTO WEC utilizes wave motion to pump–via buoys connected to pistons–working fluid within a closed circuit and store it as potential energy that can be converted to electricity via turbines. This paper introduces the mechanical design and model-based performance prediction of a single-piston pump that constitutes the basic building block for the MP2PTO WEC. Results provide preliminary validation of aqueous lubrication as a viable means of reducing friction and wear, suggesting that water-based hydraulic fluids can prohibit solid contact at the piston-cylinder interface while reducing volumetric leakage, and allowing for an estimation of the energy extraction efficiency for the mechanical pumping system. Pending more thorough and extended tribological investigations using the methodology introduced in this paper, findings suggest that the overall system efficiency will be dictated by the hydrodynamics of the buoys actuating the pumping system.

Suggested Citation

  • Vakis, Antonis I. & Anagnostopoulos, John S., 2016. "Mechanical design and modeling of a single-piston pump for the novel power take-off system of a wave energy converter," Renewable Energy, Elsevier, vol. 96(PA), pages 531-547.
    • Handle: RePEc:eee:renene:v:96:y:2016:i:pa:p:531-547
    DOI: 10.1016/j.renene.2016.04.076
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    References listed on IDEAS

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    Cited by:

    1. Bonovas, Markos I. & Anagnostopoulos, Ioannis S., 2020. "Modelling of operation and optimum design of a wave power take-off system with energy storage," Renewable Energy, Elsevier, vol. 147(P1), pages 502-514.
    2. Wei, Y. & Barradas-Berglind, J.J. & Yu, Z. & van Rooij, M. & Prins, W.A. & Jayawardhana, B. & Vakis, A.I., 2019. "Frequency-domain hydrodynamic modelling of dense and sparse arrays of wave energy converters," Renewable Energy, Elsevier, vol. 135(C), pages 775-788.
    3. Sun, Pengyuan & Liu, Senming & He, Hongzhou & Zhao, Yingru & Zheng, Songgen & Chen, Hu & Yang, Shaohui, 2021. "Simulated and experimental investigation of a floating-array-buoys wave energy converter with single-point mooring," Renewable Energy, Elsevier, vol. 176(C), pages 637-650.
    4. Bechlenberg, Alva & Wei, Yanji & Jayawardhana, Bayu & Vakis, Antonis I., 2023. "Analysing the influence of power take-off adaptability on the power extraction of dense wave energy converter arrays," Renewable Energy, Elsevier, vol. 211(C), pages 1-12.
    5. Collins, Ieuan & Hossain, Mokarram & Dettmer, Wulf & Masters, Ian, 2021. "Flexible membrane structures for wave energy harvesting: A review of the developments, materials and computational modelling approaches," Renewable and Sustainable Energy Reviews, Elsevier, vol. 151(C).
    6. Chen, Weixing & Wu, Zheng & Liu, Jimu & Jin, Zhenlin & Zhang, Xiantao & Gao, Feng, 2021. "Efficiency analysis of a 3-DOF wave energy converter (SJTU-WEC) based on modeling, simulation and experiment," Energy, Elsevier, vol. 220(C).

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