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Preliminary Techno-Economic Study of Optimized Floating Offshore Wind Turbine Substructure

Author

Listed:
  • Adebayo Ojo

    (Department of Naval Architecture Ocean and Marine Engineering, University of Strathclyde, Glasgow G4 0LZ, UK)

  • Maurizio Collu

    (Department of Naval Architecture Ocean and Marine Engineering, University of Strathclyde, Glasgow G4 0LZ, UK)

  • Andrea Coraddu

    (Department of Maritime & Transport Technology, Delft University of Technology, 2628 CD Delft, The Netherland)

Abstract

Floating offshore wind turbines (FOWTs) are still in the pre-commercial stage and, although different concepts of FOWTs are being developed, cost is a main barrier to commercializing the FOWT system. This article aims to use a shape parameterization technique within a multidisciplinary design analysis and optimization framework to alter the shape of the FOWT platform with the objective of reducing cost. This cost reduction is then implemented in 30 MW and 60 MW floating offshore wind farms (FOWFs) designed based on the static pitch angle constraints (5 degrees, 7 degrees and 10 degrees) used within the optimization framework to estimate the reduction in the levelized cost of energy (LCOE) in comparison to a FOWT platform without any shape alteration–OC3 spar platform design. Key findings in this work show that an optimal shape alteration of the platform design that satisfies the design requirements, objectives and constraints set within the optimization framework contributes to significantly reducing the CAPEX cost and the LCOE in the floating wind farms considered. This is due to the reduction in the required platform mass for hydrostatic stability when the static pitch angle is increased. The FOWF designed with a 10 degree static pitch angle constraint provided the lowest LCOE value, while the FOWF designed with a 5 degree static pitch angle constraint provided the largest LCOE value, barring the FOWT designed with the OC3 dimension, which is considered to have no inclination.

Suggested Citation

  • Adebayo Ojo & Maurizio Collu & Andrea Coraddu, 2024. "Preliminary Techno-Economic Study of Optimized Floating Offshore Wind Turbine Substructure," Energies, MDPI, vol. 17(18), pages 1-27, September.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:18:p:4722-:d:1483041
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    References listed on IDEAS

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    1. Kaldellis, J.K. & Apostolou, D. & Kapsali, M. & Kondili, E., 2016. "Environmental and social footprint of offshore wind energy. Comparison with onshore counterpart," Renewable Energy, Elsevier, vol. 92(C), pages 543-556.
    2. Maienza, C. & Avossa, A.M. & Ricciardelli, F. & Coiro, D. & Troise, G. & Georgakis, C.T., 2020. "A life cycle cost model for floating offshore wind farms," Applied Energy, Elsevier, vol. 266(C).
    3. Findler, Nicholas V. & Lo, Cher & Lo, Ron, 1987. "Pattern search for optimization," Mathematics and Computers in Simulation (MATCOM), Elsevier, vol. 29(1), pages 41-50.
    4. Castro-Santos, Laura & Martins, Elson & Guedes Soares, C., 2016. "Cost assessment methodology for combined wind and wave floating offshore renewable energy systems," Renewable Energy, Elsevier, vol. 97(C), pages 866-880.
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