원형으로 배열된 다수 부이에 의한 파랑에너지 추출
Wave-Energy Extraction by a Compact Circular Array of Buoys
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초록
크기가 작은 다수의 부이들이 원형으로 배열되어 있을 때 부이를 통한 추출 파워를 포텐셜이론 통하여 살펴보았다. 부이의 크기와 배열 간격이 수심과 파장 그리고 설치면적의 반경에 비하여 작다는 가정 아래에서 다수부이로 채워진 수면에서의 경계조건식을 유도하고 이를 포함한 경계치문제를 고유함수전개법을 이용하여 해석하였다. 추출 파워와 입사파 에너지의 비인 취득 폭을 packing ratio, 배열 반경, 그리고 PTO 감쇠계수를 바꿔가면서 살펴보았다. 또한 다수의 소형 부이를 원형 배열하였을 때 추출된 파력이 같은 잠긴 체적을 갖는 대형 단일 부이보다 효율적임을 계산을 통하여 밝혔다.
Abstract
The wave power, extracted from a circular array of small power buoys, is investigated under thepotential theory. It is assumed that the buoy's radius, the draft, and the separation distance are much smaller than thewater depth, the wave length, and the radius of a circular deployment area. The boundary value problem involvingthe macro-scale boundary condition on the mean surface covered by buoys is solved using the eigenfunctionexpansion method. The capture width, which is defined as the ratio of the extracted power to the wave power perunit length of the incident wave crest, is assessed for various combinations of packing ratio, radius of a circulararray, and PTO damping coefficient. It is found that the circular array deployment is more effective in the viewpointof efficiency than the single large buoy of the same total displaced volume.
참고문헌 (16)
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