ESOMOOR

Enhancing shared mooring system design for floating Offshore wind farms

Context

Offshore wind energy has rapidly grown, reaching 68,258 MW globally in 2023 across 319 projects. Floating offshore wind turbines remain a small share, with 234 MW installed in 2023. However, floating capacity grew by 91% compared to the previous year. Future plans include 240,652 MW of offshore wind, 37% of which may be floating systems. By 2029, floating wind capacity could reach 14,186 MW. High costs remain a key barrier, with LCOE for floating wind roughly double that of fixed-bottom turbines.

Engineering innovations are needed to reduce CAPEX and OPEX and improve competitiveness. Shared mooring systems are an emerging solution to reduce costs. These systems connect multiple turbines, reducing the number of anchors and lines needed, but introduce complex dynamic interactions. Research shows shared moorings can influence systems motions, loads, and structural integrity.

Objective

To make significant advances in mooring technologies for large floating offshore wind farms

Scientific content

Life-time engineering assessment

• Energy harness, life cycle planning (LCP)
• Life cycle costing (LCC), life cycle assessment (LCA)

Base design

• Sites and floaters definition
• Design basis and technology gap
• Quasi-static mooring design
• Design comparison
• Fully coupled dynamic analysis

Material test for ropes

• Rope and material selection
• Static and dynamic stiffness
• Tensile behaviour law for MoorDyn
• Mesoscopic numerical model

Tool development

• MoorDyn extension
• MIKE 21 extension
• Reduced-orders model

Simulation, investigation and optimisation

• High fidelity CFD - Scale effect
• Validation of mid-fidelity models
• Safety, efficiency, redundancy
• Cable layout optimisation- Fatigue reduction
• Integrated cable-mooring design

Tank tests

• Tests in Universidad Politécnica de Madrid facilities
• Tests in DHI facilities

O&M, environment

• Underwater environment impact
• Digital for O&M
• Biofouling cleaning

Contribution of France Energies Marines

Joint supervision of PhD research carried out at ENSTA on the behaviour, testing and modelling of synthetic fibres (polyamide and polyester)

Résultats attendus Ressources générées

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Fiche du projet

Pitch vidéo

Webinaire

Rapports publics

Conclusion

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Partners

This project is led by Technical University of Denmark (DTU).

Funding

This project is funded by the Clean Energy Transition Partnership (CETP-2023-00145) which is co-funded by the European Union.

Labellisation

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ESOMOOR

Context

Objective