International Journal of Naval Architecture and Ocean Engineering

  • 제9권1호
  • /
  • Pages.25-34
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  • 2017
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  • 2092-6782(pISSN)
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  • 2092-6790(eISSN)
대한조선학회 (The Society of Naval Architects of Korea)
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Experimental study of wave energy extraction by a dual-buoy heaving system

  • Kim, J. (Department of Ocean System Engineering, Jeju National University) ;
  • Koh, H.J. (Marine & Offshore Engineering Division, Zentech E&C Seoul) ;
  • Cho, I.H. (Department of Ocean System Engineering, Jeju National University) ;
  • Kim, M.H. (Department of Ocean Engineering, Texas A&M University, College Station) ;
  • Kweon, H.M. (Department of Railway Construction and Environmental Engineering, Gyeongju Univeristy)
  • 투고 : 2015.11.02
  • 심사 : 2016.07.06
  • 발행 : 2017.01.31
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초록

The concentric dual-buoy Wave Energy Converter (WEC), which consists of external buoy (hallow-cylinder) with toroidal appendage and cylindrical internal buoy within the moon-pool is suggested in this research and its performance in various wave conditions is studied. The Linear Electric Generator (LEG), consisting of a permanent magnet and coils, is used as a direct Power Take-Off (PTO) system. To maximize the electrical energy extracted from the PTO system, the relative heave motions between the dual buoys must be highly amplified by the multiple resonance phenomena of dual-buoy and internal-fluid motions. The high-performance range can be widened by distributing those natural frequencies with respect to the peak frequency of the wave spectrum. The performance of the newly developed dual-buoy WEC was measured throughout the systematic 1:5.95-model test in regular and irregular waves conducted in a wave tank at Seoul National University. The model-test results are also validated by an independently developed numerical method.

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참고문헌

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피인용 문헌

  1. Point Absorber Wave Energy Harvesters: A Review of Recent Developments vol.12, pp.1, 2017, https://doi.org/10.3390/en12010047
  2. Lifecycle Environmental Impact Assessment of an Overtopping Wave Energy Converter Embedded in Breakwater Systems vol.7, pp.None, 2017, https://doi.org/10.3389/fenrg.2019.00032
  3. Oscillation and Conversion Performance of Double-Float Wave Energy Converter vol.18, pp.1, 2017, https://doi.org/10.1007/s11804-019-00083-9
  4. Survey of the mechanisms of power take-off (PTO) devices of wave energy converters vol.36, pp.3, 2017, https://doi.org/10.1007/s10409-020-00958-z