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Performance Validation of Resonant Wave Power Converter with Variable Moment of Inertia

Author

Listed:
  • In-Ho Kim

    (Department of Civil Engineering, Kunsan National University, Gunsan 54150, Republic of Korea)

  • Byeong-Ryong Kim

    (Division of Mechanical and Automotive Engineering, Hoseo University, Asan 31499, Republic of Korea)

  • Seon-Jun Jang

    (Division of Mechanical and Automotive Engineering, Hoseo University, Asan 31499, Republic of Korea)

Abstract

This study focuses on the performance validation of a wave energy converter (WEC) equipped with resonant frequency adjustment capability. Achieving resonance with the oscillation period of waves is crucial for maximizing the efficiency of wave energy conversion systems. For this purpose, we introduce a variable moment of inertia (VMI) device that allows for tuning of the resonant frequency by adjusting the position of the mass. For validation of the proposed approach, performance verification experiments were conducted using a vibration platform. Through free vibration experiments, we identified the system’s resonant frequency and characteristics. In our forced vibration tests considering the wave frequency band of the coastal area, harmonic vibration experiments were performed over a range of 0.4–0.8 Hz. In these experiments, we considered three separate cases by adjusting the distance from the reel’s center to the mass. As a result, we found that the resonant frequency of the WEC can be adjusted from 0.65 Hz when the mass is furthest away to 0.55 Hz when it is closer. This research confirms the benefits obtained by utilizing VMI to adjust the resonant frequency of WECs without changing the mass or springs. This offers a promising opportunity to enhance the energy conversion efficiency of resonant-type WECs utilizing wave energy.

Suggested Citation

  • In-Ho Kim & Byeong-Ryong Kim & Seon-Jun Jang, 2023. "Performance Validation of Resonant Wave Power Converter with Variable Moment of Inertia," Energies, MDPI, vol. 16(18), pages 1-13, September.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:18:p:6617-:d:1239727
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    References listed on IDEAS

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    4. Emiliano Renzi & Simone Michele & Siming Zheng & Siya Jin & Deborah Greaves, 2021. "Niche Applications and Flexible Devices for Wave Energy Conversion: A Review," Energies, MDPI, vol. 14(20), pages 1-25, October.
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    6. Garcia-Teruel, A. & Forehand, D.I.M., 2021. "A review of geometry optimisation of wave energy converters," Renewable and Sustainable Energy Reviews, Elsevier, vol. 139(C).
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