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Experimental Investigation of the Cooperation of Wind Turbines

Author

Listed:
  • Piotr Wiklak

    (Institute of Turbomachinery, Lodz University of Technology, 90-924 Lodz, Poland)

  • Michal Kulak

    (Institute of Turbomachinery, Lodz University of Technology, 90-924 Lodz, Poland)

  • Michal Lipian

    (Institute of Turbomachinery, Lodz University of Technology, 90-924 Lodz, Poland)

  • Damian Obidowski

    (Institute of Turbomachinery, Lodz University of Technology, 90-924 Lodz, Poland)

Abstract

The article discusses the wind tunnel experimental investigation of two turbines (the downstream unit placed fully in the wake of the upstream one) at various turbulence intensity levels and wind turbine separation distances, at a Reynolds number of approximately 10 5 . The velocity deficit due to the upstream turbine operation is reduced as the wake mixes with the undisturbed flow, which may be enhanced by increasing the turbulence intensity. In a natural environment, this may be provoked by natural wind gusts or changes in the wind inflow conditions. Increased levels of turbulence intensity enlarge the plateau of optimum wind turbine operation—this results in the turbine performance being less prone to variations of tip speed ratio. Another important set of results quantifies the influence of the upstream turbine operation at non-optimal tip speed ratio on the overall system performance, as the downstream machine gains more energy from the wake flow. Thus, all power output maximisation analyses of wind turbine layout in a cluster should encompass not only the locations and distances between the units, but also their operating parameters (TSR, but also pitch or yaw control of the upstream turbine(s)).

Suggested Citation

  • Piotr Wiklak & Michal Kulak & Michal Lipian & Damian Obidowski, 2022. "Experimental Investigation of the Cooperation of Wind Turbines," Energies, MDPI, vol. 15(11), pages 1-20, May.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:11:p:3906-:d:823821
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    References listed on IDEAS

    as
    1. Krzysztof Sobczak & Damian Obidowski & Piotr Reorowicz & Emil Marchewka, 2020. "Numerical Investigations of the Savonius Turbine with Deformable Blades," Energies, MDPI, vol. 13(14), pages 1-20, July.
    2. Marmidis, Grigorios & Lazarou, Stavros & Pyrgioti, Eleftheria, 2008. "Optimal placement of wind turbines in a wind park using Monte Carlo simulation," Renewable Energy, Elsevier, vol. 33(7), pages 1455-1460.
    3. Lipian, Michal & Dobrev, Ivan & Massouh, Fawaz & Jozwik, Krzysztof, 2020. "Small wind turbine augmentation: Numerical investigations of shrouded- and twin-rotor wind turbines," Energy, Elsevier, vol. 201(C).
    4. Talavera, Miguel & Shu, Fangjun, 2017. "Experimental study of turbulence intensity influence on wind turbine performance and wake recovery in a low-speed wind tunnel," Renewable Energy, Elsevier, vol. 109(C), pages 363-371.
    5. Lipian, Michal & Dobrev, Ivan & Karczewski, Maciej & Massouh, Fawaz & Jozwik, Krzysztof, 2019. "Small wind turbine augmentation: Experimental investigations of shrouded- and twin-rotor wind turbine systems," Energy, Elsevier, vol. 186(C).
    6. Adaramola, M.S. & Krogstad, P.-Å., 2011. "Experimental investigation of wake effects on wind turbine performance," Renewable Energy, Elsevier, vol. 36(8), pages 2078-2086.
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