Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Evaluation of a Grid System for Numerical Analysis of a Small Savonius Wind Turbine

사보니우스 소형풍력터빈 수치해석용 격자시스템 평가

  • KIM, CHUL-KYU (Environmental and Plant Engineering Research Institute, Korea Institute of Civil Engineering and Build Technology) ;
  • LEE, SANG-MOON (Environmental and Plant Engineering Research Institute, Korea Institute of Civil Engineering and Build Technology) ;
  • JEON, SEOK-YUN (Environmental and Plant Engineering Research Institute, Korea Institute of Civil Engineering and Build Technology) ;
  • YOON, JOON-YONG (Deprt. of Mechanical Engineering, Graduate School, Hanyang University) ;
  • JANG, CHOON-MAN (Environmental and Plant Engineering Research Institute, Korea Institute of Civil Engineering and Build Technology)
  • Received : 2016.09.02
  • Accepted : 2016.10.30
  • Published : 2016.10.30
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Abstract

This paper presents the effect of a grid system on the performance of a small Savonius wind turbine installed side-by-side. Turbine performance is compared using three different grid systems; tetrahedral grid having a concentrated circular grid around turbine rotors, the tetrahedral grid having a concentrated rectangular grid around turbine rotors and the symmetric grid having a concentrated tetrahedral grid near the turbine rotor blades and a hexahedral grid. The commercial code, SC/Tetra has been used to solve the three-dimensional unsteady Reynolds-averaged Navier-Stokes analysis in the present study. The Savonius turbine rotor has a rotational diameter of 0.226m and an aspect ratio of 1.0. The distance between neighboring rotor tips keeps the same length of the rotor diameter. The variations of pressure and power coefficient are compared with respect to blade rotational angles and rotating frequencies of the turbine blade. Throughout the comparisons of three grid systems, it is noted that the symmetric grid having a concentrated tetrahedral grid near the turbine rotor blades and a hexahedral grid has a stable performance compared to the other ones.

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References

  1. H. S. Oh, "사진으로 보는 태기산 풍력 발전소", http://www.gwnews.org/news/articleView.html?dxno=14889.
  2. K. Matthias, M. Quinn and O. D. John, "Energy Exchange in an Array of Vertical-Axis Wind Turbines", J. Turbulence, Vol. 13, No. 38, 2012, pp. 1-13. https://doi.org/10.1080/14685248.2011.633522
  3. 한국에너지기술연구원, "국내풍력발전 현황", http://kredc.kier.re.kr/kier/02_energyInfo/Wind_countryin.aspx.
  4. G. S. Park, K. G. Ryu, and H. G. Kim, "Wake Losses and Repositioning of Wind turbines at Wind Farm", J. Korean Solar Energy. Society, Vol. 35, No. 3, 2015, pp. 17-25.
  5. S. H. Lee, H. G. Jeong, and S. D. Kwon, "Effects of Turbulence Intensities on Wake Models of Horizontal Wind Turbine", J. Compt. Struct. Eng. Inst. Korea, Vol. 27, No. 4, 2014, pp. 273-279. https://doi.org/10.7734/COSEIK.2014.27.4.273
  6. S. H. Park, K. H. Kim, K.S. Lee, Y. S. Park, H. S. Oh, H. K. Shin, and K. Y. Hong, "Arrangement Design and Performance Evaluation for Multiple Wind Turbines of 10MW Class Floating Wave-Offshore Wind Hybrid Power Generation Systems", J. Korean Society. Maritime Environment. Energy, Vol. 18, No. 2, 2015, pp. 123-132. https://doi.org/10.7846/JKOSMEE.2015.18.2.123
  7. C. M. Jang, S. M. Lee, W. H. Jeon, and T. G. Lim, "Evaluation of Energy Production for a Small Wind Turbine by Considering the Geometric Shape of the Deokjeok-Do Island", Trans. of the Korean Hydrogen and New Energy Society, Vol. 25, No. 6, 2014, pp. 629-635. https://doi.org/10.7316/KHNES.2014.25.6.629
  8. J. H. Kim, "Modeling & Operating Algorithm of Islanding Microgrid with Wind Turbine, Deisel Generator and BESS", J. Korea Acad.-Indus. Cooper. Society, Vol. 15, No. 9, 2014, pp. 5893-5898. https://doi.org/10.5762/KAIS.2014.15.9.5893
  9. Y. T. Lee, and H. C. Lim, "Numerical Study to Determine Optimal Design of 500W Darrieus-type Vertical Axis Wind Turbine", Trans. Korean Soc. Mech. Eng. B, Vol. 39, No. 8, 2015, pp. 693-702. https://doi.org/10.3795/KSME-B.2015.39.8.693
  10. S. H. Kim and C. U. Cheong, "Numerical Investigation on the Flow Noise Characteristics of the Hybrid Vertical-axis Wind Turbine", J. Acos. Soc. Korea, Vol. 33, No. 6, 2014, pp. 693-702.
  11. S. M. Lee and C. M. Jang, "Analysis of Annual Energy Production of Vertical Axis Wind Turbine using Experimental and Numerical Simulation", ASME-JSME-KSME Joint Fluids Engineering Conference, 2015, pp. 1940-1941.
  12. SC/Tetra 9.0, User Guide, Software Cradle Co. Ltd. (2010).