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Experimental Study of Small Vertical Axis Wind Turbine according to Type of Blades

블레이드 형태에 따른 소형 수직축 풍력발전기의 실험적 연구

  • Lee, Min-Gu (Department of Electrical Engineering, Wonkwang University) ;
  • Oh, Hun (Department of Electrical Engineering, Wonkwang University) ;
  • Park, Wal-Seo (Department of Electrical Engineering, Wonkwang University)
  • 이민구 (원광대학교 전기공학과) ;
  • 오훈 (원광대학교 전기공학과) ;
  • 박왈서 (원광대학교 전기공학과)
  • Received : 2017.10.24
  • Accepted : 2017.12.08
  • Published : 2017.12.31

Abstract

Owing to the depletion of fossil energy, wind power is attracting attention as a promising environmentally friendly alternative energy source, because it is abundant, renewable, and non-polluting. Wind turbines are divided into horizontal axis wind turbines (HAWTs) and vertical axis wind turbines (VAWTs) according to the direction of the rotating shaft. VAWTs have a low power generation efficiency, but are not affected by the wind direction and, thus, no yaw system is required and their structure is simple. Small VAWTs are attracting much attention because they can generate power even at low wind speeds. In this study, the output voltages and output currents of small VAWTs with gyromill type, hinge type and double door type blades capable of generating power even at low wind speeds were analyzed at variable wind speeds in the range of 1~11 m/s. At the maximum wind speed of 11m/s, the application of the double door type blades achieved 67% and 9% higher wind turbine output voltages than that of the gyromill type and hinge type blades, respectively. As regards the wind turbine output currents, the application of the double door type blades gave rise to 93% and 5% higher results than that of the gyromill type and hinge type blades, respectively. Through this study, the excellent output characteristics and commercialization potential of the double door type blades, which can generate power both at low and high wind speeds, were confirmed.

풍력은 자원이 풍부하고, 끊임없이 재생되며, 공해물질 배출이 없어서 친환경적인 점에서 화석에너지 고갈 시에 대비한 유망한 대체 에너지원으로서 각광받는 에너지이다. 풍력발전기는 회전축의 방향에 따라 수평축 풍력발전기와 수직축 풍력발전기로 구분되며, 수직축은 발전효율이 낮은 단점이 있는 반면에 바람의 방향에 영향을 받지 않아 요잉 시스템이 필요가 없어 구조가 간단하고, 저 풍속에서도 풍력발전이 가능한 장점이 있어 현재 소형 수직축 풍력발전기가 주목받고 있다. 본 연구에서는 저 풍속에서도 발전 가능한 자이로밀형, 힌지형, 양문형의 블레이드 형태에 따른 소형 수직형 풍력발전기를 이용하여 1m/s~11m/s의 가변풍속에 따른 발전기의 출력전압 및 출력전류를 분석하였다. 연구결과 최대풍속 11m/s일 때 발전기 출력전압은 양문형 블레이드를 적용 시 자이로밀형 블레이드보다 67%, 힌지형 블레이드보다 9%가 증가되었으며, 발전기 출력전류는 양문형 블레이드를 적용 시 자이로밀형 블레이드보다 93%, 힌지형 블레이드보다 5%가 증가되었다. 본 연구를 통해 저풍속 및 고풍속에서의 발전이 용이한 양문형 블레이드의 우수한 출력특성과 실용화 가능성을 확인하였다.

Keywords

References

  1. B. K. Kim, Y. H. Kim, W. S. Song, S. B. Lee, S. K. Nam, S. M. Kim, "An Experimental Study on the Performance of the Vertical-Axis Wind Turbine", The KSFM Journal of Fluid Machinery, vol. 10, no. 3, pp. 17-24, June, 2007. DOI: https://doi.org/10.5293/KFMA.2007.10.3.017
  2. J. H. Kim, I. H. Ryu, B. G. Kim, C. J. Yang, "A Study on the Vertical Axis Wind Turbine Performance in Different Blade Shapes", The KSFM Journal of Fluid Machinery, vol. 20, no. 4, pp. 25-30, August, 2017. DOI: http://dx.doi.org/10.5293/kfma.2017.20.4.025
  3. D. S. Choi, "Structural Analysis and Design of Small Wind Turbine Blade", Journal of the Korean Society of Manufacturing Process Engineers, vol. 14, no. 1, pp. 85-91, February, 2015. DOI: http://dx.doi.org/10.14775/ksmpe.2015.14.1.085
  4. K. S. So, C. W. Choi, D. C. Lee, K. W. Kang, "Structural Optimization for Hybrid Vertical-Axis Wind Turbine Blade using Response Surface Method", Transactions of the Korean Society of Mechanical Engineers-A, vol. 37, no. 11, pp. 1331-1337, November, 2013. DOI: http://dx.doi.org/10.3795/KSME-A.2013.37.11.1331
  5. H. Y. Jung, Y. H. Choi, Y. W. Lee, Y. D. Kim, "Effect on the Starting Characteristics of the Vertical Axis Wind Turbine with various Airfoil shapes", Proceedings of the KFMA Annual Meeting, pp. 406-407, December, 2009.
  6. C. W. Choi, J. W. Jin, K. W. Kang, "Structural Optimization for Small Scale Vertical-Axis Wind Turbine Blade using Response Surface Method", The KSFM Journal of Fluid Machinery, vol. 16, no. 4, pp. 22-27, August, 2013. DOI: http://dx.doi.org/10.5293/kfma.2013.16.4.022
  7. C. H. Hong, S. H. Seo, "Basic Experiment Using Taguchi method for Vertical Wind Turbine with Wind-shield", Journal of Ocean Engineering and Technology, vol. 25, no. 3, pp. 86-90, June, 2011. DOI: https://doi.org/10.5574/KSOE.2011.25.3.085
  8. D. H. Kim, H. C. Choi, J. W. Lee, G. J. Ryu, S. B. Kim, K. W. Kim, H. W. Nam, M. G. Lee, "Aerodynamic and Structural Design of 6kW Class Vertical-Axis Wind Turbine", The KSFM Journal of Fluid Machinery, vol. 14, no. 2, pp. 52-58, April, 2011. DOI: 10.5293/KFMA.2011.14.2.052
  9. S. H. Kim, G. S. Lee, C. U. Cheong, "Numerical analysis on the flow noise characteristics of 300W Savonius-type vertical-axis wind turbines", Conference of the Korean Society for Noise and Vibration Engineering, pp. 725-730, October, 2012.
  10. H. G. Jeong, S. H. Lee, S. D. Kwon, "Effect of Blockage Ratio on Wind Tunnel Testing of Small Vertical-Axis Wind Turbines", Journal of the Korean Solar Energy Society, vol. 34, no. 3, pp. 98-106, June, 2014. DOI: http://dx.doi.org/10.7836/kses.2014.34.3.098
  11. M. Islam, D. S. K. Ting, A. Fartaj, "Aerodynamic models for Darrieus-type straight-bladed vertical axis wind turbines", Renewable and Sustainable Energy Reviews, vol. 12, no. 4, pp. 1087-1109, May, 2008. DOI: https://doi.org/10.1016/j.rser.2006.10.023
  12. P. Gulve, S. B. Barve "Design and Construction of Vertical Axis Wind Turbine," International Journal of Mechanical Engineering and Technology, vol. 5, no. 10, pp. 148-155, October, 2014.
  13. S. Eriksson, H. Bernhoff, M. Leijon, "Evaluation of different turbine concepts for wind power," Renewable and Sustainable Energy Reviews, vol. 12, no. 5, pp. 1419-1434, June, 2008. DOI: https://doi.org/10.1016/j.rser.2006.05.017
  14. W. S. Cho, H. S. Kim, Y. D. Choi, "Shape design and flow analysis on a 200W-class gyromill type vertical axis wind turbine rotor blade", Journal of the Korean Society of Marine Engineering, vol. 37, no. 2, pp. 170-177, March, 2013. DOI: http://dx.doi.org/10.5916/jkosme.2013.37.2.170
  15. W. S. Cho, Y. D. Choi, H. S. Kim, "Fluid-structure interaction analysis on a low speed 200W-class gyromill type vertical axis wind turbine rotor blade", Journal of the Korean Society of Marine Engineering, vol. 37, no. 4, pp. 344-350, May, 2013. DOI: http://dx.doi.org/10.5916/jkosme.2013.37.4.344
  16. D. H. Kang, W. S. Shin, J. H. Lee "Experimental study on the performance of urban small vertical wind turbine with different types", The KSFM Journal of Fluid Machinery, vol. 17, no. 6, pp. 64-68, December, 2014. DOI: http://dx.doi.org/10.5293/kfma.2014.17.6.064