Qualification of innovative floating substructures for 10MW wind turbines and water depths greater than 50m

The research leading to these results has received funding from the European Union Horizon2020 programme under the agreement H2020-LCE-2014-1-640741.

LIFES50+ Final Event Bilbao, 03 April 2019

Session: Floating substructure designTopic: OO-Star Wind Floater

Håkon AndersenDr.techn. Olav Olsen

Outline

• Short introduction to Dr.techn. Olav Olsen

• Introduction to the OO-Star Wind Floater

• Development of the 10MW floater

• Benefits of the Lifes50+

• Conclusions

205 April 2019

DR.TECHN. OLAV OLSEN

305 April 2019

• Independent structural and marine consulting company

• Founded in 1962• Main office at Lysaker, 100 employees• Regional office in Trondheim• Contributes in all project phases, from

concept development to decommissioning

• Participates regularly in research and development projects

OO-Star Wind Floater

05 April 2019

• Concrete floater

• Robust design

• Low quay side draft

• Full assembly at quay side

• Good scalability

• Suitable for mass fabrication

• Based on established offshore technology

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Concrete Floater -Description

Golfe de Fos Gulf ofMaine

West ofBarra

Unit

Overall footprint, B x L 83 x 75 87 x 78 90 x 81 m

c/c Shaft-Corner columns 36 37 38 m

Height structure 30 33 36 m

Operational Draft 20 22 22,5 m

Concrete Volume 4824 5203 5700 m3

Displacement, operation 22300 24100 25700 T

Key Figures

OO-Star Wind Floater – Design and Analysis

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OO-Star Wind Floater – Fabrication scheme

705 April 2019

OO-Star Wind Floater – Benefits of Lifes50+

• Upscaling to 10MW

• Benchmarking with other developers

• Common design requirements

• Adapted floater to three sites

• Basin and wind tunnel tests

• Further development of cost estimates and fabrication scheme

• Third party evaluations of the floater

• Collaboration with other industry experts and research institutions

• Turbine controller adaption

805 April 2019 Link to video from basin test

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OO-Star Wind Floater can accommodate large turbines

-10.00%

10.00%

30.00%

50.00%

70.00%

90.00%

110.00%

130.00%

150.00%

4 MW 6 MW 8 MW 10 MW

OO Star Wind Floater - Substructure cost

Mild Hs=7m Medium Hs=11 Harsh Hs=15

Trendline indicates 30% reduced floater cost per MW from 8 to 16, from scaling effects alone

OO-Star Wind Floater – Conclusions

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• Developed for state of the art turbine size

• Technically proven

• Key benefits verified

• Ready for full-scale demonstrator(s) to prepare for mass fabrication and future large scale developments.

05 April 2019

The research leading to these results has received funding from the European Union Horizon2020 programmeunder the agreement H2020-LCE-2014-1-640741.

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THANK YOU!

www.lifes50plus.eu