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Optimization of composite material tower for offshore wind turbine structures

Author

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  • O'Leary, Kieran
  • Pakrashi, Vikram
  • Kelliher, Denis

Abstract

The focus of this study was to investigate the application of lightweight fiber reinforced composite materials in the construction of offshore wind turbine support structures. A composite tower design suitable for the NREL 5 MW reference wind turbine is presented. The design is based on the most automated and low cost composite manufacturing methods (pultrusion and filament winding) and the conclusions of this study may not be applicable for offshore structures using different composite material construction techniques. The mass of the tower was minimized using gradient based optimization approach. The cost of a composite tower was calculated and levelized cost of energy (LCOE) projections are discussed in comparison with the existing steel tower cost. The study determined that while the composite tower is technically feasible and has a lower mass than a comparable steel tower, uncertainty remains in how it compares economically in terms of LCOE.

Suggested Citation

  • O'Leary, Kieran & Pakrashi, Vikram & Kelliher, Denis, 2019. "Optimization of composite material tower for offshore wind turbine structures," Renewable Energy, Elsevier, vol. 140(C), pages 928-942.
    • Handle: RePEc:eee:renene:v:140:y:2019:i:c:p:928-942
    DOI: 10.1016/j.renene.2019.03.101
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    References listed on IDEAS

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    1. Morató, A. & Sriramula, S. & Krishnan, N. & Nichols, J., 2017. "Ultimate loads and response analysis of a monopile supported offshore wind turbine using fully coupled simulation," Renewable Energy, Elsevier, vol. 101(C), pages 126-143.
    2. Birgir Freyr Ragnarsson & Gudmundur V. Oddsson & Runar Unnthorsson & Birgir Hrafnkelsson, 2015. "Levelized Cost of Energy Analysis of a Wind Power Generation System at Búrfell in Iceland," Energies, MDPI, vol. 8(9), pages 1-22, September.
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    1. Chen, Yisu & Wu, Di & Yu, Yuguo & Gao, Wei, 2021. "Do cyclone impacts really matter for the long-term performance of an offshore wind turbine?," Renewable Energy, Elsevier, vol. 178(C), pages 184-201.
    2. Deirdre O’Donnell & Jimmy Murphy & Vikram Pakrashi, 2020. "Damage Monitoring of a Catenary Moored Spar Platform for Renewable Energy Devices," Energies, MDPI, vol. 13(14), pages 1-22, July.
    3. O’Kelly-Lynch, Patrick & Long, Cian & McAuliffe, Fiona Devoy & Murphy, Jimmy & Pakrashi, Vikram, 2020. "Structural design implications of combining a point absorber with a wind turbine monopile for the east and west coast of Ireland," Renewable and Sustainable Energy Reviews, Elsevier, vol. 119(C).
    4. Yu Hu & Jian Yang & Charalampos Baniotopoulos, 2020. "Study of the Bearing Capacity of Stiffened Tall Offshore Wind Turbine Towers during the Erection Phase," Energies, MDPI, vol. 13(19), pages 1-19, October.
    5. Ramon Varghese & Vikram Pakrashi & Subhamoy Bhattacharya, 2022. "A Compendium of Formulae for Natural Frequencies of Offshore Wind Turbine Structures," Energies, MDPI, vol. 15(8), pages 1-31, April.

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