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Vertical-Axis Tidal Turbines: Model Development and Farm Layout Design

Author

Listed:
  • Micol Pucci

    (Department of Energy, Systems, Territory and Constructions Engineering, University of Pisa, Largo Lucio Lazzarino, 56122 Pisa, Italy)

  • Raffaele Spina

    (Department of Energy, Systems, Territory and Constructions Engineering, University of Pisa, Largo Lucio Lazzarino, 56122 Pisa, Italy)

  • Stefania Zanforlin

    (Department of Energy, Systems, Territory and Constructions Engineering, University of Pisa, Largo Lucio Lazzarino, 56122 Pisa, Italy)

Abstract

In this paper, we propose a new 3D model for vertical-axis tidal turbines (VATTs) embedded in the shallow-water code SHYFEM. The turbine model is based on the Blade-Element∖Momentum (BEM) theory and, therefore, is able to predict turbine performance based on the local flow conditions and the geometric characteristics of the turbine. It is particularly suitable for studying turbine arrays, as it can capture the interactions between the turbines. For this reason, the model is used to test a tidal farm of 21 devices with fluid dynamic simulations. In particular, we deploy the farm at Portland Bill, which is a marine site characterised by a wide spread in the direction of the tidal currents during a flood-ebb tide cycle. We optimised the lateral and longitudinal spacing of the turbines in a fence using computational fluid dynamics simulations and then performed a sensitivity analysis by changing the distance between the fences. The results show that the greater the distance between the fences, the higher the power output. The increase in power generation is around 16%, but this implies a huge increase in the horizontal extent of the farm. Further assessments should be carried out, as the expansion of a marine area dedicated to energy exploitation may conflict with other stakeholder interests.

Suggested Citation

  • Micol Pucci & Raffaele Spina & Stefania Zanforlin, 2024. "Vertical-Axis Tidal Turbines: Model Development and Farm Layout Design," Energies, MDPI, vol. 17(10), pages 1-21, May.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:10:p:2366-:d:1394293
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    References listed on IDEAS

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    1. Robins, Peter E. & Neill, Simon P. & Lewis, Matt J., 2014. "Impact of tidal-stream arrays in relation to the natural variability of sedimentary processes," Renewable Energy, Elsevier, vol. 72(C), pages 311-321.
    2. Ramos, V. & Carballo, R. & Ringwood, John V., 2019. "Application of the actuator disc theory of Delft3D-FLOW to model far-field hydrodynamic impacts of tidal turbines," Renewable Energy, Elsevier, vol. 139(C), pages 1320-1335.
    3. Roc, Thomas & Conley, Daniel C. & Greaves, Deborah, 2013. "Methodology for tidal turbine representation in ocean circulation model," Renewable Energy, Elsevier, vol. 51(C), pages 448-464.
    4. Goward Brown, Alice J. & Neill, Simon P. & Lewis, Matthew J., 2017. "Tidal energy extraction in three-dimensional ocean models," Renewable Energy, Elsevier, vol. 114(PA), pages 244-257.
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