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Design, Manufacture & Test a Small Sample of Type Darrieus Vertical Axis Wind Turbine

Khojasteh, Hassan Ali | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 45511 (46)
  4. University: Sharif University of Technology
  5. Department: Energy Engineering
  6. Advisor(s): Saboohi, Yadollah; Boroushaki, Mehrdad
  7. Abstract:
  8. Recently wind turbines with vertical axis attract attention of world’s scientific society to itself because of many reasons such as: ability to work in areas with high turbulency, structural simplicity, independency from wind direction, easy maintenance and low capital cost. So that major part of recent researches in context of wind turbines are about these turbines. In this project a small sample of wind turbine from darrieus type have been designed, manufactured and finally important parameters such as Pitch Angle, Blade numbers and Aspect Ratio have been investigated. Darrieus turbine with 4 Blades and Pitch Angle of +15° was the most appropriate sample between the test samples. In the case of aspect ratios, selection of each of them depended on work conditions and user purposes.
    This turbine has the ability to be combined with Savonius turbine in the state of synchronous and nonsynchronous. Nonsynchronous combination of Darrieus and Savonius turbines is an Innovative method that was designed and implemented for the first time in this project. This combination doesn’t need special change in structure and cost and is an appropriate method for power coefficients optimization in high Tip Speed Ratios and more power generation in comparison with synchronous turbines those are widely being used at all over the world. More over by this method the problem of initial operation of Darrieus turbine and weakness of power coefficient in low Tip Speed Ratios will be eliminated.
  9. Keywords:
  10. Momentum Effect ; Vertical Axis Wind Turbine ; Darrieus Turbine ; Savonius Turbine ; Combined Turbine ; Nonsynchronous Combination

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