Floating Offshore Wind Turbines Powering the Future

Lisbon Portugal 2013

Erik-Jan de Ridder (e.d.ridder@marin.nl)

MARITIME RESEARCH INSTITUTE NETHERLANDS

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Independent and innovative service provider for the maritime sector in hydrodynamic and nautical research

Simulations Model testing

Full scale Training

LOCATION, FACTS AND FIGURES

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•One of the leading research institutes

•Located in the Netherlands and USA

Joint Venture in China (SSSRI-MARIN Co. Ltd.)

•Agent in Brazil (Oceanica)

•350 employees

•Model tests since 1932

Over 7300 propellers

•Over 9400 models

MARIN’S ACTIVITIES

Industry MARIN Universities

MARIN’S ACTIVITIES IN OFFSHORE WIND

Transportation Installation

Maintenance

& Support

Production Removal ? Development Fabrication

MARIN’S ACTIVITIES IN OFFSHORE WIND

Transportation Installation

Maintenance

& Support

Production Removal ? Development Fabrication

ScenSim

Maintenance

Vessel JIP

RENT: CHALLENGING WIND, CURRENT AND WAVES

Courtesy Hywind Courtesy MCT Courtesy Wavebob

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HIGH QUALITY WIND SETUP IN THE OFFSHORE BASIN

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SCALED MODEL WIND TURBINE

• Dynamics offshore wind

• Scaling of wind loads (CT)

• Preventing of serious scale effects (low Re numbers)

• Design & CFD simulations

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CONSTRUCTION OF THE BLADES

• Challenging

• Very stiff and very light

• Only 130 gram

• 1.2m length of the blades

• Preferred thickness only 1-2cm

• Trailing edge thickness 1mm

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SCALED MODEL WIND TURBINE

• Development of hardware

• Pitch control mechanism 40 deg/s

• Wind turbine blades (scaled weight) (0.2 kg)

• Total weight 5kg

• Less (stiff) cables for powering and instrumentation, and improve routing of the cable (e.g. underwater)

FLOATING WIND TURBINE MODEL TESTS

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CONCRETE INVOLVEMENT FLOATING OFFSHORE WIND

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• >10 commercial floating wind turbine projects: • Sway floating wind

• Cantabria floating wind

• DeepCwind Maine floating wind (2011-2013)

• EU project Deepwind (2011)

• GustoMSC-ECN-MARIN floating wind tool MIP project

• Gicon floating wind turbine

• OC4 model tests (2013)

• …….

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DIFFERENT TYPE OF FLOATING WIND TURBINES

Turbine with Spar floater Turbine with Semi floater Turbine with TLP floater

Spar: Semi: TLP:

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GICON OFFSHORE WIND

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Will be deployed in the Baltic sea in 2014/2015

GLOSTEN OFFSHORE WIND PROJECT

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Will be placed in North sea in coming years

GUSTOMSC TRI-FLOATER

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Developed by Gusto within a MIP project

Force & moment

Model test aNySIM-Phatas calculation

OFFSHORE WIND: NEW TOOLS & METHODS

Froude scaling:

Design the rotor at MS to achieve the best thrust!

Rotor: thrust more important than torque

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THANK YOU FOR YOUR ATTENTION