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Self Installing Wind Turbine (SIWT) Mark Riemers – Managing Director.

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Presentation on theme: "Self Installing Wind Turbine (SIWT) Mark Riemers – Managing Director."— Presentation transcript:

1 Self Installing Wind Turbine (SIWT) Mark Riemers – Managing Director

2 Contents Introduction & Services Suction piles Products Self Installing Wind Turbine

3 Main Shareholder Volker Wessels (VW) Group VWS Group Turnover 2010 EUR 4.5 billion Employees VWS Group 17, companies, including e.g.: Volker Construction International (harbours, jetties, tunnels) Volker Stevin Marine Contractors (power cables and directional drilling) Stemat (barges, tugs, rock dump) Volker Steel & foundations (fabrication) Worldwide Offshore, Civil & Marine Contracting

4 SPT Offshore Concept Studies Self Installing Platforms Moorings Subsea Foundations Offshore Contracting Detailed geotechnical, structural & marine design of self installing platforms, moorings, subsea structures Fabrication suction piles, jackets and subsea structures Transport & offshore installation

5 Yard / base Rotterdam

6 DP2 Cable Lay Vessel 90 m LOA x 28 m wide x 6.5m deep DP 2 Nautronix Cable lay & Reel lay 10 knots transit speed 5 MW installed power 60 beds minimum

7 Suction Pump Equipment Fleet of 17 suction pumps Flows up to 440 m3/hr, up to 8 bar Water depths 5m - 3,000m X&Y inclinometers Pressure measurement Internal plug measurement Diverless connection

8 Contents Introduction & Services Suction piles Products Self Installing Wind Turbine

9 Why Suction Piles? Easy to install and remove Swift installation Re-usable Ideal in combination with in- expensive marine spreads (barge, tugs) No need for heavy lift vessels

10 Suction Pile Design Components Skin friction Passive suction Top plate end bearing (subject to soils) Scour protection may be needed Engineering acc. API / DNV / ABS 3D FE analysis Plaxis  z low R

11 Suction piles Suction Piles suited for foundations and moorings Proven Designs Vast Experience

12 Contents Introduction & Services Suction piles Products Self Installing Wind Turbine

13 Products Suction Piles Suction Pile Foundations Suction Pile Clusters (SPC) Suction Embedded Anchors (SEA) Self Installing Platforms (SIP)

14 Platform installed without heavy lift crane Founded on Suction Piles with Unbraced Legs Suited for water depths up to 50 m Suited for deck weights up to 10,000 mT Re-usable and easy decommissioning No piling, hence no distraction to marine life SIP2 - Barge Installed Platform

15 SPT Offshore recently installed the Centrica F3-FA platform

16 Contents Introduction & Services Suction piles Products Self Installing Wind Turbine

17 SIWT Self Installing Wind Turbine Installed in one piece Standard marine equipment, e.g. flat barge & tugs and suction pumps Braced mono-pile foundation 3 No. suction piles ballast on 2 No. piles Water depths up to 60 m Suited for large >5 MW turbines Suited for wide range soils SIWT has been selected for the Carbon Trust OWA next generation foundations competition. The design of the SIWT has progressed to a de-risking stage. Next steps will be scaled model testing in basin and detailed design for demonstrator project.

18 SIWT Self Installing Wind Turbine

19 1. lift suction piles on to temporary foundation in harbour basin 2. Lift tripod and place on top of suction piles and secure tripod to suction piles (Grouted connection). Assembly sequence: 3. Assembly and commissioning of wind turbine generator 1 2 3

20 SIWT Self Installing Wind Turbine 4. Pick up of complete wind turbine by the transport and installation barge and seafasten for offshore installation Sail to location 6. Lowering wind turbine to seabed and install suction piles 6

21 SIWT Self Installing Wind Turbine New Technology?

22 SIWT Self Installing Wind Turbine Features Standard marine spread Low spread dayrate No noise no distraction to marine life Re-usable & completely decommissioned Proven technology tripod design suction pile foundation Short cycle time < 3-4 days High workability Quick return on investment Patented

23 SIWT substructure Braced monopile (Steel) Main suction pile (Steel) Braced suction pile (Steel + concrete)

24 Supply chain considerations Mast, nacelle and blades Tripod Assembly site Modular system: Less dependent on single fabricator Outsourcing of elements Lighter lifts  lighter equipment More suitable ports/yards

25 T&I: marine spread Heavy duty Transport & Installation barge, equipped with: Lifting/lowering system Grillage Ballast system Mooring winches Suction pump spread Crawler crane Accommodation etc Tugs (2 x 90tbp) Suction pumps (3x) ROV, diving (contingency) and survey from barge

26 T&I: workability Transport Design seastate Hs = 4.0m   low roll response during extreme seastates  Roll (T=16 s) and pitch (T=12 s) natural period high   Maximum acceleration nacelle = 0.5 g for Hs 4.0 m Installation/lowering Design seastate Hs = 1.5m

27 T&I: workability Transport : Design seastate Hs = 4.0m

28 Alternative: foundation only

29 Questions?


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