제주대학교 Repository

저 풍속지역에서의 AEP 향상을 고려한 3MW급 풍력터빈 블레이드 공력 최적설계 및 성능해석

Metadata Downloads
Alternative Title
Aerodynamic Design, Optimization and Performance Analysis of a 3MW Wind Turbine blade for Low Wind Speed Sites Considering AEP Enhancement
Abstract
The annual average wind speed in more than 80% of the global area that can potentially be employed for onshore wind farm development is lower than 7 m/s. Onshore wind farm development has been accomplished in most regions with excellent wind resource. Based on the increasing need for onshore wind farm development in low-wind-speed sites owing to the effect of environmental factors, commercial demand of IEC-Class III wind turbine has significantly increased among the world's leading developers and wind turbine manufacturers of the wind power industry. Thus, aerodynamic design of a 3MW wind turbine blade for low-wind-speed sites was performed in this study. The geometry was optimized to improve AEP (Annual Energy Production) and minimize the increasing rate of thrust. The performance analysis result by BEM(Blade Element Momentum) method showed that the increase of thrust was limited to less than 5% and AEP was greatly enhanced by 1.89GWh at annual average wind speed of 7 m/s compared to the reference blade. All analysis results was calculated by using BEM theory. It has as disadvantage as the prediction accuracy can greatly vary depending on external input data reliability. also the effect of a complicated 3D flow occurring at the blade suction side can't be considered in the power and load analysis process as it is very simple. Thus, the final performance of the blade designed by BEM theory must be verified using CFD technique, which can clearly simulate physical phenomena. Therefore, CFD simulation was performed. It was confirmed that AEP was increased by 1.36GWh in condition of average wind speed of 7m./s and the increasing rate of thrust was found to be 5.1% at the rated wind speed.
Author(s)
이진석
Issued Date
2016
Awarded Date
2016. 8
Type
Dissertation
URI
http://dcoll.jejunu.ac.kr/jsp/common/DcLoOrgPer.jsp?sItemId=000000007730
Alternative Author(s)
Lee, Jin-Suk
Department
대학원 풍력공학부 풍력기계시스템전공
Advisor
김범석
Table Of Contents
List of Figures ⅲ
List of Tables ⅴ
Abstract 1
I. 서 론 2
1. 연구배경 2
2. 연구목적 3
II. 수평축 풍력터빈의 공기역학 5
1. 운동량 이론 5
2. 로터이론 8
3. 날개요소 운동량 이론 11
4. 팁 손실계수 적용 14
III. 저 풍속 지역에 최적화된 블레이드 설계 15
1. 사전설계준비 15
1.1 로터직경 및 팁 속도 선정 15
1.2 에어포일 배치 및 선정 17
1.3 공력성능데이터 확보 19
2. Baseline blade 설계 20
2.1 블레이드 설계 과정 정립 20
2.2 형상설계 및 성능해석 21
2.3 피치 및 토크 제어 적용 25
2.4 In-house code 신뢰성 검토 27
2.5 연간에너지발전량 검토 28
3. 저 풍속용 블레이드 설계 29
3.1 최적 설계변수 선정 29
3.2 형상 설계 및 성능해석 30
3.3 피치 및 토크 제어 적용 31
3.4 연간에너지발전량 검토 33
4. 형상 최적화 34
5. Baseline과 저 풍속용 블레이드 성능해석 결과 비교 36
5.1 출력 & 추력 & 출력계수 36
5.2 연간에너지발전량 비교 36
IV. CFD를 이용한 수평축 로터 블레이드 성능평가 39
1. BEM 기법의 한계 39
2. 3D 모델링 및 수치해석 조건 39
3. 격자의존성 검토 42
4. 해석결과 및 고찰 45
4.1 블레이드 압력분포도 및 표면유선 45
4.2 블레이드 국부단면 흐름특성 48
4.3 출력 및 연간에너지발전량 비교 49
V. 결론 51
참고문헌 52
Degree
Master
Publisher
제주대학교 대학원
Citation
이진석. (2016). 저 풍속지역에서의 AEP 향상을 고려한 3MW급 풍력터빈 블레이드 공력 최적설계 및 성능해석
Appears in Collections:
Faculty of Wind Energy Engineering > Wind Power Mechanical System Engineering
공개 및 라이선스
  • 공개 구분공개
파일 목록

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.