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Development of a Wave Energy Converter with Mechanical Power Take-Off via Supplementary Inertia Control

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Abstract

To reduce environmental pollution, alternative renewable energy resources have been explored for decades. Wave energy has a high energy density, high utilization time and no fuel costs, so it is considered as the most promising alternative to the fossil fuel resources. The number of studies of wave energy converters (WECs) has rapidly increased. This paper proposes a new method to achieve the resonant behavior of a point absorber floating buoy type of WEC using a mechanical power take-off system. By using the inertia characteristics of a hydraulic flywheel accumulator-based electro-hydraulic actuator to change the corresponding supplementary mass of the floating buoy, the total mass of the buoy was close to a match with the relatively low frequency of the wave, so that the buoy was in resonance with the wave. The specifications of the hydraulic flywheel accumulator system were proposed and studied. The working principle was analyzed, and a mathematical model was then derived to investigate the system operation. An experimental set-up was implemented to validate the mathematical model. Numerical simulation using MATLAB/Simulink was done to evaluate the operation of the system.

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Acknowledgements

This work was supported by the 2019 Research Fund of University of Ulsan.

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Authors and Affiliations

  1. Graduate School of Mechanical Engineering, University of Ulsan, Ulsan, Nam-gu, 44610, Korea

    Tri Dung Dang, Minh Tri Nguyen & Cong Binh Phan

  2. Faculty of Mechanical Engineering, Ho Chi Minh City University of Technology and Education, Ho Chi Minh City, 700000, Vietnam

    Cong Binh Phan

  3. Department of Mechanical Engineering, University of Ulsan, Ulsan, Nam-gu, 44610, Korea

    Kyoung Kwan Ahn

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  1. Tri Dung Dang
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  2. Minh Tri Nguyen
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Correspondence to Kyoung Kwan Ahn.

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Dang, T.D., Nguyen, M.T., Phan, C.B. et al. Development of a Wave Energy Converter with Mechanical Power Take-Off via Supplementary Inertia Control. Int. J. of Precis. Eng. and Manuf.-Green Tech. 6, 497–509 (2019). https://doi.org/10.1007/s40684-019-00098-1

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  • DOI: https://doi.org/10.1007/s40684-019-00098-1

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