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Rotor Loading Characteristics of a Full-Scale Tidal Turbine

Author

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  • Magnus Harrold

    (University of Exeter, College of Engineering, Mathematics and Physical Sciences, Penryn, Cornwall TR10 9FE, UK
    These authors contributed equally to this work.)

  • Pablo Ouro

    (Hydro-Environmental Research Centre, School of Engineering, Cardiff University, Cardiff CF24 3AA, UK
    These authors contributed equally to this work.)

Abstract

Tidal turbines are subject to highly dynamic mechanical loading through operation in some of the most energetic waters. If these loads cannot be accurately quantified at the design stage, turbine developers run the risk of a major failure, or must choose to conservatively over-engineer the device at additional cost. Both of these scenarios have consequences on the expected return from the project. Despite an extensive amount of research on the mechanical loading of model scale tidal turbines, very little is known from full-scale devices operating in real sea conditions. This paper addresses this by reporting on the rotor loads measured on a 400 kW tidal turbine. The results obtained during ebb tidal conditions were found to agree well with theoretical predictions of rotor loading, but the measurements during flood were lower than expected. This is believed to be due to a disturbance in the approaching flood flow created by the turbine frame geometry, and, to a lesser extent, the non-typical vertical flow profile during this tidal phase. These findings outline the necessity to quantify the characteristics of the turbulent flows at sea sites during the entire tidal cycle to ensure the long-term integrity of the deployed tidal turbines.

Suggested Citation

  • Magnus Harrold & Pablo Ouro, 2019. "Rotor Loading Characteristics of a Full-Scale Tidal Turbine," Energies, MDPI, vol. 12(6), pages 1-19, March.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:6:p:1035-:d:214631
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    Cited by:

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    3. Moreau, Martin & Germain, Grégory & Maurice, Guillaume, 2023. "Experimental performance and wake study of a ducted twin vertical axis turbine in ebb and flood tide currents at a 1/20th scale," Renewable Energy, Elsevier, vol. 214(C), pages 318-333.
    4. Alyona Naberezhnykh & David Ingram & Ian Ashton & Joel Culina, 2023. "How Applicable Are Turbulence Assumptions Used in the Tidal Energy Industry?," Energies, MDPI, vol. 16(4), pages 1-21, February.
    5. Okulov, V.L. & Naumov, I.V. & Kabardin, I.K. & Litvinov, I.V. & Markovich, D.M. & Mikkelsen, R.F. & Sørensen, J.N. & Alekseenko, S.V. & Wood, D.H., 2021. "Experiments on line arrays of horizontal-axis hydroturbines," Renewable Energy, Elsevier, vol. 163(C), pages 15-21.
    6. Stylianos Argyrios Pitsikoulis & Sravya Tekumalla & Anurag Sharma & Wai Leong Eugene Wong & Serkan Turkmen & Pengfei Liu, 2023. "Cavitation Hydrodynamic Performance of 3-D Printed Highly Skewed Stainless Steel Tidal Turbine Rotors," Energies, MDPI, vol. 16(9), pages 1-26, April.
    7. Robynne E. Murray & Andrew Simms & Aidan Bharath & Ryan Beach & Mark Murphy & Levi Kilcher & Andy Scholbrock, 2023. "Toward the Instrumentation and Data Acquisition of a Tidal Turbine in Real Site Conditions," Energies, MDPI, vol. 16(3), pages 1-14, January.
    8. Lilian Lieber & Shaun Fraser & Daniel Coles & W. Alex M. Nimmo-Smith, 2024. "Sheared turbulent flows and wake dynamics of an idled floating tidal turbine," Nature Communications, Nature, vol. 15(1), pages 1-17, December.
    9. Larissa Perez & Remo Cossu & Camille Couzi & Irene Penesis, 2020. "Wave-Turbulence Decomposition Methods Applied to Tidal Energy Site Assessment," Energies, MDPI, vol. 13(5), pages 1-21, March.
    10. Perez, Larissa & Cossu, Remo & Grinham, Alistair & Penesis, Irene, 2022. "An investigation of tidal turbine performance and loads under various turbulence conditions using Blade Element Momentum theory and high-frequency field data acquired in two prospective tidal energy s," Renewable Energy, Elsevier, vol. 201(P1), pages 928-937.

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