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SeaGen: A flagship project for the Ocean Industry

Sven Stoye/David Langston, Marine Current Turbines, November 2014

ICOE Halifax

ICOE Halifax Page 2 S Stoye / D Langston

SeaGen Predecessors

ICOE Halifax Page 3 S Stoye / D Langston

SeaGen

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Flagship Project

• The world’s first utility scale grid connected tidal turbine • Installed in 2008 • Installed in Strangford Lough, Northern Ireland

ICOE Halifax Page 5 S Stoye / D Langston

SeaGen

ICOE Halifax Page 6 S Stoye / D Langston

• Rated Power Output 1.2MW (2 x 600kW) at 2.4m/s

• Twin axial flow rotors of 16m diameter with a tip speed of 12m/s

• Rotor blades can be pitched to 270° work in both directions

• Produced nearly 10GWh • Record 22.52MWh in one day • Supplies ecofriendly electricity to

approximately 1,500 homes • Rotor compensates for oscillating

pressure

SeaGen-S 1.2MW

ICOE Halifax Page 7 S Stoye / D Langston

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Production history

First Power Generation

Pin failures

Loose bolts

FC Failure Coolant leak

Blade Failures

ICOE Halifax Page 8 S Stoye / D Langston

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Raw AvailabilityCompensated for Inspections and other fault types

Power train 3: Availability Jan 12 to July 13

Remedial work Frequency Converter – Current Sensor Fault

87% compensated availability over 19 month period

94% compensated availability over 13 months

ICOE Halifax Page 9 S Stoye / D Langston

Note

mean max rotor Cp = 0.48

in range 0.45 – 0.52

Actual performance as validated by DNV

ICOE Halifax Page 10 S Stoye / D Langston

Environmental lessons learnt

Strangford Lough assigned many European environmental designations Regulator imposed intensive 3 year post installation monitoring requirements • SeaGen successfully operated under an Adaptive Management Approach

which is managed by a Science Group with independent chair

ICOE Halifax Page 11 S Stoye / D Langston

Environmental lessons learnt

• Passive acoustic monitoring and seal tagging demonstrated SeaGen is not a barrier to marine mammals

• Bird populations not affected • No negative impacts on benthic

community • >£2 million (3.6mCAD) has been

invested in the environmental monitoring program

ICOE Halifax Page 12 S Stoye / D Langston

Lessons learnt to enable future developments

• Operational experiences enabled upscaling of device to 1MW powertrain • Project development for further deployments informed by experiences gained

at Strangford • Component failures facilitated more robust supply chain and equipment

specification • FMEA used to improve ongoing equipment design • Input from Siemens continues to improve systems and • Maximise onshore component and system testing

ICOE Halifax Page 13 S Stoye / D Langston

1MW Drive Train Validation - NaREC

ICOE Halifax Page 14 S Stoye / D Langston

Energy Conversion Chain

Standardised 1MW Powertrain Standardised 1MW Power Electronics & Control System

ICOE Halifax Page 15 S Stoye / D Langston

Commercial product portfolio using universal Energy Conversion Chain

SeaGen-U SeaGen-F

Working with

ICOE Halifax Page 16 S Stoye / D Langston

Contact

David Langston Head of Sales and Business Development Marine Current Turbines

Tel.: +44 (0)117 957 7600

E-mail:david.langston@siemens.com

Siemens: Answers for energy. Answers for life.

ICOE Halifax Page 17 S Stoye / D Langston

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Operating Constraints

MMO & Sonar on-board, daylight operation only

Weekdays

Shore sonar 09:00 to 17:00hrs

Shore sonar dawn to dusk

: 24/7 operation with

shore sonar