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Co-located offshore wind and tidal stream turbines: Assessment of energy yield and loading

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  • Lande-Sudall, D.
  • Stallard, T.
  • Stansby, P.

Abstract

Co-location of wind and tidal stream turbines provides opportunity for improved economic viability of electricity generation from these resources relative to projects exploiting each resource separately. Here co-deployment is assessed in terms of energy generation and loading of support structures. Energy yield is modelled using an eddy viscosity wake model for wind turbines and superposition of self-similar wakes for tidal turbines. A case-study of the Inner Sound of the Pentland Firth is considered. For 3.5 years of coincident resource data, 12 MW wind capacity co-located with a 20 MW tidal array results in a 70% increase in energy yield, compared to operating the tidal turbines alone. Environmental loads are modelled for a braced monopile structure supporting both a wind and tidal turbine, as well as for each system in isolation. Peak loading of the combined system is found to be driven by wind loads with greatest overturning moment occurring with the wind turbine operating at close to rated-speed and the tidal turbine close to its shutdown speed. Mean loads vary across the tidal array by 6% indicating no significant shielding effects are gained by co-locating in more sheltered regions of the array.

Suggested Citation

  • Lande-Sudall, D. & Stallard, T. & Stansby, P., 2018. "Co-located offshore wind and tidal stream turbines: Assessment of energy yield and loading," Renewable Energy, Elsevier, vol. 118(C), pages 627-643.
    • Handle: RePEc:eee:renene:v:118:y:2018:i:c:p:627-643
    DOI: 10.1016/j.renene.2017.10.063
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    References listed on IDEAS

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    1. Heptonstall, Philip & Gross, Robert & Greenacre, Philip & Cockerill, Tim, 2012. "The cost of offshore wind: Understanding the past and projecting the future," Energy Policy, Elsevier, vol. 41(C), pages 815-821.
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    4. Stansby, Peter & Stallard, Tim, 2016. "Fast optimisation of tidal stream turbine positions for power generation in small arrays with low blockage based on superposition of self-similar far-wake velocity deficit profiles," Renewable Energy, Elsevier, vol. 92(C), pages 366-375.
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    Cited by:

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    2. Bahaj, AbuBakr S. & Mahdy, Mostafa & Alghamdi, Abdulsalam S. & Richards, David J., 2020. "New approach to determine the Importance Index for developing offshore wind energy potential sites: Supported by UK and Arabian Peninsula case studies," Renewable Energy, Elsevier, vol. 152(C), pages 441-457.
    3. Liu, Xiaodong & Chen, Zheng & Si, Yulin & Qian, Peng & Wu, He & Cui, Lin & Zhang, Dahai, 2021. "A review of tidal current energy resource assessment in China," Renewable and Sustainable Energy Reviews, Elsevier, vol. 145(C).
    4. Yang, Zhixue & Ren, Zhouyang & Li, Hui & Pan, Zhen & Xia, Weiyi, 2024. "A review of tidal current power generation farm planning: Methodologies, characteristics and challenges," Renewable Energy, Elsevier, vol. 220(C).
    5. Tao, Siyu & Xu, Qingshan & Feijóo-Lorenzo, Andrés E. & Zheng, Gang & Zhou, Jiemin, 2021. "Optimal layout of a Co-Located wind/tidal current farm considering forbidden zones," Energy, Elsevier, vol. 228(C).

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