Journal of the Korean Solar Energy Society (한국태양에너지학회 논문집)

The Korean Solar Energy Society (한국태양에너지학회)
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Accounting for the Atmospheric Stability in Wind Resource Variations and Its Impacts on the Power Generation by Concentric Equivalent Wind Speed

동심원 등가풍속을 이용한 대기안정도에 따른 풍력자원 변화에 관한 연구

  • Ryu, Geon-Hwa (Div. of Earth Environmental System, Pusan National University) ;
  • Kim, Dong-Hyeok (Institute of Environment Studies, Pusan National University) ;
  • Lee, Hwa-Woon (Div. of Earth Environmental System, Pusan National University) ;
  • Park, Soon-Young (Institute of Environment Studies, Pusan National University) ;
  • Yoo, Jung-Woo (Div. of Earth Environmental System, Pusan National University) ;
  • Kim, Hyun-Goo (Korea Institute of Energy Research)
  • 류건화 (부산대학교 대기과학과) ;
  • 김동혁 (부산대학교 환경연구원) ;
  • 이화운 (부산대학교 대기과학과) ;
  • 박순영 (부산대학교 환경연구원) ;
  • 유정우 (부산대학교 대기과학과) ;
  • 김현구 (한국에너지기술연구원 신재생에너지 지원센터)
  • Received : 2016.01.11
  • Accepted : 2016.02.26
  • Published : 2016.02.28
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Abstract

The power production using hub height wind speed tends to be overestimated than actual power production. It is because the hub height wind speed cannot represent vertical wind shear and blade tip loss that aerodynamics characteristic on the wind turbine. The commercial CFD model WindSim is used to compare and analyze each power production. A classification of atmospheric stability is accomplished by Monin-Obukhov length. The concentric wind speed constantly represents low value than horizontal equivalent wind speed or hub height wind speed, and also relevant to power production. The difference between hub height wind speed and concentric equivalent wind speed is higher in nighttime than daytime. Under the strongly convective state, power production is lower than under the stable state, especially using the concentric equivalent wind speed. Using the concentric equivalent wind speed considering vertical wind shear and blade tip loss is well estimated to decide suitable area for constructing wind farm.

Keywords

References

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