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Ocean wave energy pitching harvester with a frequency tuning capability

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  • Viet, N.V.
  • Wang, Q.

Abstract

The research introduces a development of a novel and efficient pitching harvester with capacity of frequency conversion and force magnification to convert the low-frequency ocean wave energy to usable electricity based on the piezoelectric effect. The advantages of the proposed harvester over existing ocean wave energy harvesters are the characteristics of its minimized components and space, which are vital for the survivability and sustainability on harsh ocean conditions. The harvester comprises of four magnetic bar-mass-spring-lever-piezoelectric systems arranged symmetrically. By this smart design, the harvester is able to transform the low-frequency of ocean waves to a higher excitation frequency of motions and to magnify the force magnitude of the piezoelectric transducer for harnessing a higher power. A mathematical model for the harvester taking into account the practical wave-structure pitching interaction is developed to evaluate its efficacy. Subsequently, a generated power of 900 W is able to be tracked at a near-resonance of the harvester by adjusting the dimensions, distances and material properties of the developed harvester with a keel depth, a harvester length, a wave period, and a wave height as ds=0.25m, L=1.5m, T=7s, and Hw=1.5m, respectively.

Suggested Citation

  • Viet, N.V. & Wang, Q., 2018. "Ocean wave energy pitching harvester with a frequency tuning capability," Energy, Elsevier, vol. 162(C), pages 603-617.
    • Handle: RePEc:eee:energy:v:162:y:2018:i:c:p:603-617
    DOI: 10.1016/j.energy.2018.08.067
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    References listed on IDEAS

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    1. Viet, N.V. & Xie, X.D. & Liew, K.M. & Banthia, N. & Wang, Q., 2016. "Energy harvesting from ocean waves by a floating energy harvester," Energy, Elsevier, vol. 112(C), pages 1219-1226.
    2. Dalton, G.J. & Alcorn, R. & Lewis, T., 2010. "Case study feasibility analysis of the Pelamis wave energy convertor in Ireland, Portugal and North America," Renewable Energy, Elsevier, vol. 35(2), pages 443-455.
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    3. Cai, Qinlin & Zhu, Songye, 2021. "Applying double-mass pendulum oscillator with tunable ultra-low frequency in wave energy converters," Applied Energy, Elsevier, vol. 298(C).
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    12. Kong, Weihua & He, Liujin & Hao, Daning & Wu, Xiaoping & Xiao, Luo & Zhang, Zutao & Xu, Yongsheng & Azam, Ali, 2023. "A wave energy harvester based on an ultra-low frequency synergistic PTO for intelligent fisheries," Renewable Energy, Elsevier, vol. 217(C).
    13. Li, Peng & Qian, Zhi & Zhang, Yinghong & Ma, Tingfeng & Kuznetsova, Iren E. & Qian, Zhenghua & Kolesov, Vladimir, 2023. "The energy focusing of reflected flexural waves via two adjacent phase-modulation-based lenses," Energy, Elsevier, vol. 267(C).
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