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Characteristics of a highly efficient propeller type small wind turbine with a diffuser

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  • Matsushima, Toshio
  • Takagi, Shinya
  • Muroyama, Seiichi

Abstract

We studied the improved effects a diffuser had on the output power of small wind turbine systems, aiming to introduce these systems to radio relay stations as an independent power supply system. A frustum-shaped diffuser was chosen from an economical standpoint and wind speed distribution. The effect the diffuser's shape had on the wind speed was analyzed by simulation and showed that the wind speed in the diffuser was greatly influenced by the length and expansion angle of the diffuser, and maximum wind speed increased 1.7 times with the selection of the appropriate diffuser shape. The wind speed in the diffuser was fastest near the diffuser's entrance. We conducted field tests using a real examination device with a diffuser and confirmed that the output power of the wind power generator increased by up to 2.4 times compared to that of a conventional turbine. Moreover, it was confirmed that the diffuser was especially useful where the wind direction was constant.

Suggested Citation

  • Matsushima, Toshio & Takagi, Shinya & Muroyama, Seiichi, 2006. "Characteristics of a highly efficient propeller type small wind turbine with a diffuser," Renewable Energy, Elsevier, vol. 31(9), pages 1343-1354.
    • Handle: RePEc:eee:renene:v:31:y:2006:i:9:p:1343-1354
    DOI: 10.1016/j.renene.2005.07.008
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    References listed on IDEAS

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    1. Grassmann, H. & Bet, F. & Cabras, G. & Ceschia, M. & Cobai, D. & DelPapa, C., 2003. "A partially static turbine—first experimental results," Renewable Energy, Elsevier, vol. 28(11), pages 1779-1785.
    2. Bet, F & Grassmann, H, 2003. "Upgrading conventional wind turbines," Renewable Energy, Elsevier, vol. 28(1), pages 71-78.
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    Cited by:

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    6. Refaie, Abdelaziz G. & Hameed, H.S. Abdel & Nawar, Mohamed A.A. & Attai, Youssef A. & Mohamed, Mohamed H., 2022. "Comparative investigation of the aerodynamic performance for several Shrouded Archimedes Spiral Wind Turbines," Energy, Elsevier, vol. 239(PC).
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    9. Chong, W.T. & Yip, S.Y. & Fazlizan, A. & Poh, S.C. & Hew, W.P. & Tan, E.P. & Lim, T.S., 2014. "Design of an exhaust air energy recovery wind turbine generator for energy conservation in commercial buildings," Renewable Energy, Elsevier, vol. 67(C), pages 252-256.
    10. Wang, Wen-Xue & Matsubara, Terutake & Hu, Junfeng & Odahara, Satoru & Nagai, Tomoyuki & Karasutani, Takashi & Ohya, Yuji, 2015. "Experimental investigation into the influence of the flanged diffuser on the dynamic behavior of CFRP blade of a shrouded wind turbine," Renewable Energy, Elsevier, vol. 78(C), pages 386-397.
    11. Anbarsooz, M. & Amiri, M. & Rashidi, I., 2019. "A novel curtain design to enhance the aerodynamic performance of Invelox: A steady-RANS numerical simulation," Energy, Elsevier, vol. 168(C), pages 207-221.
    12. Kardous, M. & Chaker, R. & Aloui, F. & Nasrallah, S. Ben, 2013. "On the dependence of an empty flanged diffuser performance on flange height: Numerical simulations and PIV visualizations," Renewable Energy, Elsevier, vol. 56(C), pages 123-128.
    13. Refaie, Abdelaziz G. & Abdel Hameed, H.S. & Nawar, Mohamed A.A. & Attai, Youssef A. & Mohamed, Mohamed H., 2021. "Qualitative and quantitative assessments of an Archimedes Spiral Wind Turbine performance augmented by A concentrator," Energy, Elsevier, vol. 231(C).
    14. Nardecchia, Fabio & Groppi, Daniele & Astiaso Garcia, Davide & Bisegna, Fabio & de Santoli, Livio, 2021. "A new concept for a mini ducted wind turbine system," Renewable Energy, Elsevier, vol. 175(C), pages 610-624.
    15. Liu, Jie & Song, Mengxuan & Chen, Kai & Wu, Bingheng & Zhang, Xing, 2016. "An optimization methodology for wind lens profile using Computational Fluid Dynamics simulation," Energy, Elsevier, vol. 109(C), pages 602-611.
    16. Chong, W.T. & Poh, S.C. & Fazlizan, A. & Yip, S.Y. & Chang, C.K. & Hew, W.P., 2013. "Early development of an energy recovery wind turbine generator for exhaust air system," Applied Energy, Elsevier, vol. 112(C), pages 568-575.
    17. Masaō Ashtine & Richard Bello & Kaz Higuchi, 2016. "Feasibility of Small Wind Turbines in Ontario: Integrating Power Curves with Wind Trends," Resources, MDPI, vol. 5(4), pages 1-14, December.

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