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A self-starting darrieus-type windmill

Author

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  • Nahas, M.N.

Abstract

A new design concept is proposed for a Darrieus-type windmill in which the straight blades of the rotor are pitched at low values of the tip-speed ratio to make the angle of attack small in order to avoid stall. The new design makes the windmill self-starting, which allows generation of torque and power at low rotational speed. This change eliminates the need for external means of starting and results in an obvious cost advantage. The expected performance of the windmill is analysed in detail and the torque produced and the power coefficient of the new design are compared with those of a conventional Darrieus machine. The effect of geometry on performance has been analysed.

Suggested Citation

  • Nahas, M.N., 1993. "A self-starting darrieus-type windmill," Energy, Elsevier, vol. 18(9), pages 899-906.
    • Handle: RePEc:eee:energy:v:18:y:1993:i:9:p:899-906
    DOI: 10.1016/0360-5442(93)90002-U
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    Cited by:

    1. Didane, Djamal Hissein & Rosly, Nurhayati & Zulkafli, Mohd Fadhli & Shamsudin, Syariful Syafiq, 2018. "Performance evaluation of a novel vertical axis wind turbine with coaxial contra-rotating concept," Renewable Energy, Elsevier, vol. 115(C), pages 353-361.
    2. Emejeamara, F.C. & Tomlin, A.S., 2020. "A method for estimating the potential power available to building mounted wind turbines within turbulent urban air flows," Renewable Energy, Elsevier, vol. 153(C), pages 787-800.
    3. Asr, Mahdi Torabi & Nezhad, Erfan Zal & Mustapha, Faizal & Wiriadidjaja, Surjatin, 2016. "Study on start-up characteristics of H-Darrieus vertical axis wind turbines comprising NACA 4-digit series blade airfoils," Energy, Elsevier, vol. 112(C), pages 528-537.

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