Journal of Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회논문집)

Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회)
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Performance Assessment of Two Horizontal Shroud Tidal Current Energy Converter using Hydraulic Experiment

수리실험을 통한 수평 2열 쉬라우드 조류에너지 변환장치 성능평가

  • Lee, Uk-Jae (Marine Big-data Center, Korea Institute of Ocean Science and Technology) ;
  • Choi, Hyuk-Jin (Coast and Ocean Technology Research Institute) ;
  • Ko, Dong-Hui (Coastal Development and Ocean Energy Research Center, Korea Institute of Ocean Science & Technology)
  • 이욱재 (한국해양과학기술원 해양빅데이터센터) ;
  • 최혁진 ((주)해안해양기술) ;
  • 고동휘 (한국해양과학기술원)
  • Received : 2021.12.08
  • Accepted : 2022.01.06
  • Published : 2022.02.28
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Abstract

In this study, the two horizontal shroud tidal current energy converter, which can generate power even under low flow speed conditions, was developed. In order to determine the shape of the shroud system, a three-dimensional numerical simulation test was conducted, and a 1/6 scale down model was made to perform a hydraulic model experiment. The hydraulic model experiment was performed under four flow conditions, and the flow speed, torque, and RPM were measured for each experimental case. As a result of the numerical simulation test, it was found that the flow speeds passing through the nozzle were increased by about 2~3 times in the cylinder, and when the extension ratio was 2:1, the highest flow speed was shown. In addition, it was found that the flow speeds increased 2.8 times when the diameter ratio between the nozzle and the cylinder was 1.5:1. Meanwhile, as a result of the hydraulic model experiment, it was found that when the tip speed ratio was between 1.75 and 2, the power coefficient was 0.32 to 0.34.

본 연구에서는 저유속 조건에서도 발전이 가능한 수평 2열 쉬라우드 조류에너지 변환장치를 개발하였다. 쉬라우드 시스템의 형상을 결정하기 위해 3차원 수치모의 실험을 수행하였으며, 1/6 축소모형을 제작하여 수리모형 실험을 수행하였다. 수리모형 실험은 4가지 유속 조건하에서 수행하였으며, 각각의 실험 케이스별로 유속, 토크 및 RPM을 계측하였다. 수치모의 실험 결과, 노즐을 통과한 유속은 실린더에서 약 2~3배 유속이 증폭되는 것을 확인하였으며, 연장비가 2:1일 때, 가장 높은 유속 증폭율을 보였다. 또한 노즐과 실린더의 직경비는 1.5:1일 때 유속이 2.8배 증가하는 것으로 나타났다. 한편 수리모형 실험 결과, TSR이 1.75~2 일 때, 0.32~0.34의 출력 성능을 보이는 것으로 나타났다.

Keywords

Acknowledgement

본 논문은 해양수산부 해양산업 성장 기술개발 사업인 "항만시설물 전력공급용 1 KW급 조력발전장치 개발(과제번호: 20210224)" 과제의 일환으로 수행되었습니다. 연구지원에 감사드립니다.

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