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An evaluation on suitability of suction caisson foundation for 5MW offshore wind turbine
김용천(Kim, Yongchun),박현철(Park, Hyunchul),정진화(Chung, Chinwha),권대용(Kwon, Daeyong),이승민(Lee, Seunugmin),Shi, Wei 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.11
A three-dimensional numerical modeling using the finite element method for the suction caisson are described to decide suitability as foundation of offshore wind turbine in this paper. In the simulation, soil-structure interaction is defined by comparing experiment data. The reaction of monopod suction caisson is presented by moment loading which was calculated by FAST. Tendency of suction caisson appeared by difference of length and diameter of skirt under coupled loading. Length and diameter of skirt are suggested and evaluated as a offshore wind turbine.
A study on load evaluation and analysis for foundation of the offshore wind turbine system
권대용(Kwon, Daeyong),박현철(Park, Hyunchul),정진화(Chung, Chinwha),김용천(Kim, Yongchun),이승민(Lee, Seungmin),Shi, Wei 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.11
With growing of wind turbine industry, offshore wind turbine system is getting more attention in recent years. Foundation of the offshore wind turbine plays a key role in stability of whole system. In this work, 5MW NREL reference wind turbine with rated speed of 11.4m/s is used for load calculation. Wind loads and wave loads are evaluated using GH-Bladed (Garard Hassan) and FAST (NREL). Additionally, FE simulation is carried out to investigate the wave effect on the support structure. Meanwhile, this work is trying to systematize and optimize load cases simulation for foundation of wind turbine system.
Analysis of economy and load effect of hybrid tower for wind turbine
이승민(Lee, Seunugmin),박현철(Park, Hyunchul),정진화(Chung, Chinwha),권대용(Kwon, Daeyong),김용천(Kim, Yongchun),Shi, Wei 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.11
With the development of wind industry, the rated power of wind turbine also increase gradually. Accordingly, the size of wind turbine tower becomes larger and larger. The tower base diameter of 2MW wind turbine is about 4m. Larger tower is expected for 4MW or 5MW turbine. Due to limitation of transportation, new type of tower with smooth transportation and effective cost is needed. In this work, a hybrid tower consisting of steel and concrete is designed and analyzed. The optimum ratio of steel and concrete of hybrid tower are calculated as well as the thickness of the concrete part. Different FE analysis including modal analysis, buckling analysis and fatigue analysis are performed to check the design of hybrid tower comparing with the steel tower. Redesign is also expected after various analysis.
The performance analysis for NREL Phase VI Blade with blunt airfoil
이성건(Lee, Sunggun),이경세(Lee, Kyungseh),정진화(Chung, Chinwha),박현철(Park, Hyunchul) 한국신재생에너지학회 2011 한국신재생에너지학회 학술대회논문집 Vol.2011 No.05
This study focus on the performance of blade with blunt airfoil which used at root region on Computational Fluid Dynamics(CFD). Based on the Phase VI had experiment by NREL, the experiment condition is also used for the performance of blade with the airfoil that trailing edge is changed. The thickness of airfoil trailing edge 1% and 5% is substituted for original airfoil. This study was progressing to calculate the pressure coefficient and torque from the effect on each airfoil according to difference of the thickness.
The Analysis of 3MW Embedded Type PMSG for Wind Turbine
원정현(Won, Jeonghyun),이상우(Lee, Sangwoo),김동언(Kim, D.E.),정진화(Chung, Chinwha),박현철(Park, H.C.) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.11
This paper introduces a 3MW embedded Permanent Magnet Synchronous Generator(PMSG) for wind turbine. The generator features 313mm stator inner radius and 974mm stator length. The blade rotor angular velocity is 15.7 rpm and the gear ratio is set to be 92.93. The nominal generator rpm at rated load is about 1459. The number of poles is six and embedded in the generator rotor. Embedded permanent magnet excitation shows higher reliability, and better efficiency. Using the finite element method, electromagnetic and thermal results are simulated by ANSYS and the results are summarized in this report.
김태훈(Kim, Taehun),김거화(Kim, Geohwa),원정현(Won, Junghyun),이수호(Lee, Sooho),김동언(Kim, Dongeun),정진화(Chung, Chinwha),박현철(Park, H.C.) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.06
포항공과대학교 풍력특성화대학원에서는 STX Windpower의 풍력발전기 국산화 사업의 일환으로 2MW 직접 구동형 영구자석 동기발전기의 설계를 변경 하였다. 정격 출력 2.3MW급으로 정격 RPM은 16.5, 고정자 내경은 2.1m로 128극을 가지고 있다. 본 설계 발전기는 STX93 모델을 기반으로 하고 있으며, 기존 발전기보다 더 compact하고 더 높은 효율의 발전기로 설계 변경하였다. 본 논문에서는 발전기 물리 설계와 그에 따른 전자기 해석 및 열 분석을 수행하고 손실을 계산한다. 또한, 그 결과와 절차에 대하여 요약하고 기존 발전기와 설계 발전기를 비교 분석한다.