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Field tests of multiple 1/10 scale tidal turbines in steady flows

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  • Jeffcoate, Penny
  • Whittaker, Trevor
  • Boake, Cuan
  • Elsaesser, Bjoern

Abstract

Queen's University Belfast and Wave Barrier Ltd have developed a tidal testing platform to test hydrokinetic turbines at medium scale. Multiple turbines can be pushed through still water conditions, in steady-state pushing tests. Experiments were conducted to evaluate the interactions between two identical, mono-strut, horizontal axis tidal turbines (HATTs) of 1.5 m diameter (D) rotor. Their relative performance when located individually, in-plane and in-line are investigated. The data shows a high consistency in the power curves at different flow speeds, which indicates high repeatability in this Reynolds range. For an individual turbine, there is no performance difference when the rotor is mounted either upstream or downstream of the supporting structure. When placed in-plane, the turbines have no adverse effect on one another. When spaced in-line with 2D separation, there is a 63% reduction in the performance of the downstream turbine. At 6D downstream this performance reduction is still 59%, indicating some wake recovery between 2D and 6D, though the influence from the upstream rotor persists to at least 6D downstream of the first device. In contrast the performance of the downstream turbine when placed at 1.5D offset of the upstream device at 6D downstream is approximately recovered to the individual turbine performance.

Suggested Citation

  • Jeffcoate, Penny & Whittaker, Trevor & Boake, Cuan & Elsaesser, Bjoern, 2016. "Field tests of multiple 1/10 scale tidal turbines in steady flows," Renewable Energy, Elsevier, vol. 87(P1), pages 240-252.
    • Handle: RePEc:eee:renene:v:87:y:2016:i:p1:p:240-252
    DOI: 10.1016/j.renene.2015.10.004
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    References listed on IDEAS

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    Cited by:

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    2. Carwyn Frost & Ian Benson & Penny Jeffcoate & Björn Elsäßer & Trevor Whittaker, 2018. "The Effect of Control Strategy on Tidal Stream Turbine Performance in Laboratory and Field Experiments," Energies, MDPI, vol. 11(6), pages 1-16, June.
    3. Alamian, Rezvan & Shafaghat, Rouzbeh & Amiri, Hoseyn A. & Shadloo, Mostafa Safdari, 2020. "Experimental assessment of a 100 W prototype horizontal axis tidal turbine by towing tank tests," Renewable Energy, Elsevier, vol. 155(C), pages 172-180.
    4. Laws, Nicholas D. & Epps, Brenden P., 2016. "Hydrokinetic energy conversion: Technology, research, and outlook," Renewable and Sustainable Energy Reviews, Elsevier, vol. 57(C), pages 1245-1259.
    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. Ebdon, Tim & Allmark, Matthew J. & O’Doherty, Daphne M. & Mason-Jones, Allan & O’Doherty, Tim & Germain, Gregory & Gaurier, Benoit, 2021. "The impact of turbulence and turbine operating condition on the wakes of tidal turbines," Renewable Energy, Elsevier, vol. 165(P2), pages 96-116.

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