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Wave Power Extraction by Strip Array of Multiple Buoys

스트립 배열된 다수 부이에 의한 파력에너지 추출

  • Received : 2014.05.17
  • Accepted : 2014.10.24
  • Published : 2014.10.31

Abstract

The majority of existing WECs (wave energy converters) are designed to achieve maximum power at a resonance condition. In the case of a single WEC, its size must be large enough for tuning, and it has high efficiency only within a limited frequency band. Recently, wave power extraction by deploying many small buoys in a compact array has been studied under the assumption that the buoy's size and separation distance are much smaller than the water depth, wave length, and size of the array. A boundary value problem involving the macro-scale boundary condition on the mean surface covered by an infinite strip of buoys is solved using the eigenfunction expansion method. The energy extraction efficiency (${\varepsilon}=1-R^2_f-T^2_r$), where $R_f$ and $T_r$ are the reflection and transmission coefficients for a strip array of buoys, is assessed for various combinations of packing ratio, strip width, and PTO damping coefficient.

Keywords

Wave energy converter;Strip array;Energy extraction efficiency;Eigenfunction expansion method;Heaving buoy

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Acknowledgement

Grant : 10MW급 부유식 파력-해상풍력 연계형 발전시스템 개발 및 인프라 구축

Supported by : 해양수산부