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Optimization of the Power Output of a Bare Wind Turbine by the Use of a Plain Conical Diffuser

Author

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  • Peace-Maker Masukume

    (Department of Physics, University of Fort Hare, Alice 5700, South Africa)

  • Golden Makaka

    (Department of Physics, University of Fort Hare, Alice 5700, South Africa)

  • Patrick Mukumba

    (Department of Physics, University of Fort Hare, Alice 5700, South Africa)

Abstract

A plain conical diffuser is optimized to augment the wind speed at the throat of the diffuser. The diffuser is used in the construction of a diffuser augmented wind turbine (DAWT) to augment the power output of a bare wind turbine (BWT). Experiments with empty conical diffusers were done to determine optimum geometrical parameters for the diffuser to achieve maximum wind speed augmentation. Using the obtained optimum geometrical parameters, an optimized plain conical DAWT was designed, constructed, and field tested. A twin decentralized wind energy system which comprised a BWT and the optimized plain conical DAWT was erected. The electrical power output from these systems was measured and compared. The optimized plain conical DAWT reduced the cut-in wind speed of a BWT from 2.5 m/s to 1.6 m/s. The power output was increased by a factor of 2.5. This power output is comparable to that of flanged diffusers. However, flanged-DAWTs are more inert due to the addition of the flange. Its response to wind speed and direction is slow as compared to plain conical DAWT. Thus, it cannot fully exploit the potential of the wind. Also, the addition of the flange increases its production cost. Therefore, plain conical DAWT can replace flanged-DAWT in wind power augmentation.

Suggested Citation

  • Peace-Maker Masukume & Golden Makaka & Patrick Mukumba, 2018. "Optimization of the Power Output of a Bare Wind Turbine by the Use of a Plain Conical Diffuser," Sustainability, MDPI, vol. 10(8), pages 1-7, July.
    • Handle: RePEc:gam:jsusta:v:10:y:2018:i:8:p:2647-:d:160367
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    References listed on IDEAS

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    1. Yuji Ohya & Takashi Karasudani, 2010. "A Shrouded Wind Turbine Generating High Output Power with Wind-lens Technology," Energies, MDPI, vol. 3(4), pages 1-16, March.
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    1. Nunes, Matheus M. & Brasil Junior, Antonio C.P. & Oliveira, Taygoara F., 2020. "Systematic review of diffuser-augmented horizontal-axis turbines," Renewable and Sustainable Energy Reviews, Elsevier, vol. 133(C).
    2. Jose Alberto Moleón Baca & Antonio Jesús Expósito González & Candido Gutiérrez Montes, 2020. "Analysis of the Patent of a Protective Cover for Vertical-Axis Wind Turbines (VAWTs): Simulations of Wind Flow," Sustainability, MDPI, vol. 12(18), pages 1-17, September.
    3. Ciprian Sorandaru & Sorin Musuroi & Flaviu Mihai Frigura-Iliasa & Doru Vatau & Marian Dordescu, 2019. "Analysis of the Wind System Operation in the Optimal Energetic Area at Variable Wind Speed over Time," Sustainability, MDPI, vol. 11(5), pages 1-16, February.
    4. Yasemin Ayaz Atalan & Mete Tayanç & Kamil Erkan & Abdulkadir Atalan, 2020. "Development of Nonlinear Optimization Models for Wind Power Plants Using Box-Behnken Design of Experiment: A Case Study for Turkey," Sustainability, MDPI, vol. 12(15), pages 1-17, July.

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