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Study on Shape Design and Power Performance Analysis of Small Horizontal Axis Tidal Turbine with Duct Using BEM and CFD Methods

Vol.42 No.3(Wn.390), 2018.3, 197-205 (9 pages)
DOI :10.3795/KSME-B.2018.42.3.197
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Abstract
본 연구에서는 상대적으로 높은 연간발전량의 확보를 위해 덕트 구조물을 이용한 수평축 조류터빈을 설계하였다. 정격유속인 2 m/s 조건을 기준으로 BEM 이론을 적용하여 블레이드 외형설계를 수행하였으며, HEEDs S/W를 이용한 덕트 구조물의 형상최적설계를 완료하였다. 설계가 완료된 덕트형 조류터빈의 출력성능비교 및 검토를 위해 STAR-CCM+를 이용한 정상상태 CFD 해석을 실시하였다. 정격유속조건에서 5.4 kW의 출력이 발생하였으며 장치의 최대효율은 1.6m/s 조건에서 45%로 나타났다. 고유속영역에서 터빈보호를 위한 실속제어가 잘 이루어지고 있음을 확인하였으며, 덕트에 의한 유속증가 효과로 인해 특정조건에서의 연간발전량은 약 9% 수준으로 향상될 수 있음을 보였다.

In this study, a horizontal-axis tidal turbine using a duct was designed to secure a relatively high annual energy production(AEP). Based on a rated flow velocity of 2m/s, the blade shape design was conducted by applying the BEM theory and the shape optimization of the duct using the HEEDs was completed. In order to compare the power performance of the duct-type tidal turbine, a steady state CFD analysis using STAR-CCM was performed. For the results, 5.4kW of electrical power was generated at the rated flow velocity, and the maximum efficiency was shown as a 45% at 1.6 m/s condition. It has been confirmed that the power curve uses stall controlled characteristics to protect the turbine under the condition of high flow velocity region. Additionally, the annual energy production can be improved to 9% under certain conditions because of the effect of flow velocity enhancement.

TOC
초록
Abstract
1. 서론
2. 블레이드 형상설계
3. 유속증가장치 형상 최적설계
4. 조류터빈 출력성능해석
5. 결론
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