Technology Update May Mark Hamilton - CTO

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Verity Carpenter
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1 Technology Update May 2012 Mark Hamilton - CTO Scotrenewables 2008

2 Company Founded 2002 Based in Orkney 14 Staff Supported by : Scotrenewables 2008

Introduction to the Scotrenewables Tidal Turbine Design Drivers: Scotrenewables believe that low-cost installation and maintenance will be the primary drivers in determining competitiveness in the

3 Introduction to the Scotrenewables Tidal Turbine Design Drivers: Scotrenewables believe that low-cost installation and maintenance will be the primary drivers in determining competitiveness in the industry Goal: To develop a robust tidal turbine that can be remotely connected and disconnected in under 30 minutes using a small, low-cost and readily available vessel Concept: The SRTT floating tidal turbine.

4 Introduction to the Scotrenewables Tidal Turbine

the dynamic environment Passive yaw control, 360º continuous rotation around mooring system Fixed pitch,

5 Introduction to the Scotrenewables Tidal Turbine Design Basics: Floating, surface piercing. Low COG. Shutdown in storm conditions to minimise loadings Catenary mooring system allows the turbine to respond to the dynamic environment Passive yaw control, 360º continuous rotation around mooring system Fixed pitch, variable speed, counter-rotating rotors PTO gearbox and variable speed induction generator Turbine structure approx 200t / MW

competition with oil industry and very expensive... DP vessels cost up to 150,000 per day + fuel depending on market conditions.

6 Key 1/5 th Issue Scale of Cost Prototype & Availability Test Site of Vessels.. Many competitors have to date been dependent on large and expensive DP vessels for deployment of fixed structures turbines Chartering of these vessels is notoriously difficult due to competition with oil industry and very expensive... DP vessels cost up to 150,000 per day + fuel depending on market conditions. SRTP has carried out installation of all elements of the SR250 system using a modest and low-cost Multicat type work vessel. Multicat Cost 2,500 to 4,000 per day & relatively stable / independent of market conditions. Next generation SRTT will also be installed, tested and maintained using the same or similar size and cost Multicat as current SR250 prototype.

7 2. SRTT Development Progression Scotrenewables 2008

1/5 1/40 th th Scale Prototype Model Tank Testing Site 2006 to 2010 Key outcomes of

Computer modelling of behaviour in operational & survivability conditions verified.

Experience of turret connection (disconnected from SRTT) in rough seas.

8 1/5 1/40 th th Scale Prototype Model Tank Testing Site 2006 to 2010 Key outcomes of 1/40 th scale model tank testing undertaken at our in-house wave & current tank: Computer modelling of behaviour in operational & survivability conditions verified. Maximum mooring loads & alternative mooring configurations investigated. Experience of turret connection (disconnected from SRTT) in rough seas. Development of operational procedures/methodologies for safe and effective handling of larger scale devices at sea.

9 1/5 th Scale Prototype (2009) Test Site 1/5 th Scale generating rated power

10 4. SR250 Prototype Scotrenewables 2008

250kW Prototype Construction @ Harland &

11 250kW Prototype Harland & Wolff SR250 on stands nearing completion.

12 250kW Prototype Internals Control Centre - Variable Speed Drives fully accessible onsite

13 250kW Prototype Construction First Wet H&W.

14 1/5 250kW th Scale Prototype Prototype Mooring Test System Site Installation Full Mooring System Installation Completed in 16 hours Onsite.

15 250kW Prototype Cable Installation Vessel Ready for Cable Laying.

16 250kW Prototype Cable Installation Start of Cable Lay Operations.

17 Completed DNV Certification DNV Prototype Readiness Statements

18 5. SR250 Testing Scotrenewables 2008

19 250kW Prototype Testing Achieved 250kW rated power December 2011

20 250kW Prototype Tow Test Data Sample tow trial data.

250kW Prototype Grid-connected Power Export SR250 @ the

21 250kW Prototype Grid-connected Power Export the EMEC test site generating into the UK national grid April 2012

22 250kW Prototype Testing Video Grid connected power generation

23 250kW Prototype Grid Connected Test Data Sample grid-connected data turbine limited to 25% power for Phase 1 tests

24 250kW Prototype In-tide Test Data Sample in tide generation data showing higher than expected rotor efficiency.

25 Current Shear Effects on Energy Capture Floating design allows rotor placement in most energetic part of water column the SRTT can capture up to twice as much energy as a bottom mounted device with the same rotor diameter.

26 6. Next Generation SRTT Scotrenewables 2008

Next Generation 2MW Commercial Demonstrator SR250 vs SR2000 Rated 2MW @ 3m/s Parameter SR250 SR2000 4 times mass of SR250 but will produce up to 8 times more power Detailed design underway

27 Next Generation 2MW Commercial Demonstrator SR250 vs SR2000 Rated 3m/s Parameter SR250 SR times mass of SR250 but will produce up to 8 times more power Detailed design underway Construction commencing this year Power (kw) Mass (Tonne) Rated Tidal Velocity (m/s) Length (m) Diameter (m) Rotor Diameter (m) 8 16 Min Draught (m) 4 6 Max Draught (m) 12 20

Will allow pre-assembly / commissioning of equipment such as the drives and auxiliary systems offsite before

28 1/5 SR2000 th Scale Design Prototype Containerised Test Site Internal Layout Learning from SR250 project SR2000 will feature 2 x removable equipment containers installed in the hull. Will allow pre-assembly / commissioning of equipment such as the drives and auxiliary systems offsite before installing in the hull - speeding up construction process. Potential for hot-swapping faulty modules as required Speeds up outfitting / construction & allows easy access at sea.

29 Onsite access Onsite access for maintenance. Access via RIB Experience in wind industry has shown that approx 80% of maintenance interventions are due to failures of components weighing less than 25kg Majority of component failures can be fixed onsite

30 SR2000 Farm SR2000 farm with maintenance vessel. 60MW/km 2 packing density.

31 SR2000 Farm SR2000 farm with maintenance vessel.

32 Cost of Energy Analysis First 10MW Array Cost Centre Pessimistic Base Optimistic Capital cost ( m) m m m Capital Cost per MW installed ( m) 2.80m 2.60m 2.50m Operating cost per year ( m) 2.35m 1.982m 1.6m Decommissioning cost ( m) 1.0m 0.929m 0.893m Annual energy production (GWh/yr) Indicative cost of energy 8% Discount Rate (p/kwh) % Discount Rate (p/kwh) Very quickly expected to reduce operational costs to under 100k/MW Moving to more energetic sites to increase capacity factors above 40% Longer term cost projections of 12p/kWh for second 10MW array * All figures produced using an approved methodology / assumptions as suggested by The Carbon Trust

33 Find out more at Scotrenewables 2008

SeaGen-S 2MW. Proven and commercially viable tidal energy generation

SeaGen-S 2MW. Proven and commercially viable tidal energy generation SeaGen-S 2MW Proven and commercially viable tidal energy generation The SeaGen Advantage The generation of electricity from tidal flows requires robust, proven, available, and cost effective technology.