Research & Development

Projet

DIME

Design and metocean: modelling and observations of extreme sea states for offshore renewable energies

Context

Offshore renewable energy systems deployed at sea are exposed to extreme waves that can jeopardize their mechanical structure. If these extreme waves are caused to break, the risk to the turbines is further increased. It is therefore essential to better understand and characterise sea states in the event of storms in order to optimise the design of renewable energy converters such as floating wind turbines.

Objective

To improve the characterisation of extreme sea states with breaking waves by combining observations and modelling

Main achievements

ldentification of a new criterion for wave breaking

Development of an engineering methodology to better estimate the forces induced by breakers on fixed wind turbine masts

Development of a new parameterisation of wave breaking statistics based on an analytical approach and incorporating key physical ingredients such as the kinematic wave breaking criterion and sea state irregularity

Documentation of the occurrence statistics and properties of breakers under storm conditions through measurement campaigns conducted from a lighthouse at sea

Main outputs

Proven protocol for instrumenting offshore structures to study wave/structure interactions
Phase resolved wave model for wave breaking
Laws for breaker statistics
Database from giant wave measurement campaigns (geometry and kinematics) off North Brittany initiated in winter 2017 and still ongoing in the DIMPACT project
Recommendations for the revision of the design standards

Project sheet

Pitch vidéo

Webinar

Public report

Conclusion

DIME has enabled the development of extreme sea state simulation tools and the develoment of recommendations contributing to the revision of design standards for offshore renewable energy technologies.

Partners

Ce projet was led by France Energies Marines.

Funding

This project received French State funding managed by the National Research Agency under the Investments for the Future Programme (ANR-10-IEED-0006-14). Testing carried out at La Jument lighthouse receives funding from Crédit Agricole’s Filière Mer division and technical support from the Direction Interrégionale de la Mer Nord Atlantique Manche Ouest.

Accreditation

This project was certified by the maritime clusters Pôle Mer Bretagne Atlantique and Pôle Mer Méditerranée.

DIME

Context

Objective

Main achievements

ldentification of a new criterion for wave breaking

Development of an engineering methodology to better estimate the forces induced by breakers on fixed wind turbine masts

Development of a new parameterisation of wave breaking statistics based on an analytical approach and incorporating key physical ingredients such as the kinematic wave breaking criterion and sea state irregularity

Documentation of the occurrence statistics and properties of breakers under storm conditions through measurement campaigns conducted from a lighthouse at sea

Main outputs

Conclusion

Partners

Funding

Accreditation

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DIME

Context

Objective

Main achievements

ldentification of a new criterion for wave breaking

Development of an engineering methodology to better estimate the forces induced by breakers on fixed wind turbine masts

Development of a new parameterisation of wave breaking statistics based on an analytical approach and incorporating key physical ingredients such as the kinematic wave breaking criterion and sea state irregularity

Documentation of the occurrence statistics and properties of breakers under storm conditions through measurement campaigns conducted from a lighthouse at sea

Main outputs

Conclusion

Partners

Funding

Accreditation

Pour aller plus loin

Ajoutez votre titre ici

Ajoutez votre titre ici

Ajoutez votre titre ici

Would you like to know more ?

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