1. NEW CONCEPTS FOR INSTALLING WINDTURBINES OFFSHORE

2. all-in-one offshore turbine installations les installations éoliennes offshore tout compris Dolf Elsevier van Griethuysen Ballast Nedam Offshore Energy Nieuwegein, The Netherlands Marseille, Jeudi 19 Mars 2009

3. Co authors Edwin van de Brug Marcel van Bergen Jurjan Blokland Ballast Nedam Offshore Nieuwegein, The Netherlands NEW CONCEPTS FOR INSTALLING WINDTURBINES OFFSHORE

4. Tradition in developping installation concepts: HLV Svanen installing Confederation Bridge, Canada

5. Tradition in developping installation concepts: HLV Svanen installing Wind turbine Foundations at Egmond, NL

6. Tradition in developping installation concepts: HLV Svanen installing Wind turbine Foundations at Egmond, NL

7. Tradition in developing installation concepts: HLV Svanen installing Wind turbine Foundations in UK

8. And also a tradition in installing gravity based foundations

9. HLV Svanen installing offshore wind farm foundations: 2006: 36 x at Egmond, The Netherlands 2008: 25 x at Rhyl Flats, UK 2008/2009: 32 x at Gunfleet Sands, UK 2010: 22 x at Baltic I, Germany New concepts for installing Windturbines Offshore

10. Present Concepts for installing Windturbines New concepts for installing Windturbines Offshore

11. Present Windturbine installation method

12. Other concepts in development

13. The Challenges New concepts for installing Windturbines Offshore

14. Challenges in the emerging market of offshore wind: political, financial and logistic constraints, grid access, weather conditions, increasing water depths. New concepts for installing Windturbines Offshore

15. Challenges in the emerging market of offshore wind: political, financial and logistic constraints, grid access, weather conditions, increasing water depths. And: more powerful and lager turbines with the subsequent need for larger installation equipment New concepts for installing Windturbines Offshore

16. Technical challenge I The concept of present-day installation equipment, mainly jack-ups, is limited by its own inherent contradiction: New concepts for installing Windturbines Offshore

17. Technical challenge I The concept of present-day installation equipment, mainly jack-ups, is limited by its own inherent contradiction: on the one hand lifting capacity should be as extensive as possible New concepts for installing Windturbines Offshore

18. Technical challenge I The concept of present-day installation equipment, mainly jack-ups, is limited by its own inherent contradiction: on the one hand lifting capacity should be as extensive as possible on the other hand the soil pressure of the legs should be kept as low as possible. New concepts for installing Windturbines Offshore

19. The Jack Up internal constraint: lifting capacity vs leg pressure

20. The Jack Up internal Constraint: lifting capacity vs leg pressure

21. Technical Challenge II For the installation of some of today’s largest offshore turbines, a one-lift concept has been successfully used, involving the deployment of a floating crane New concepts for installing Windturbines Offshore

22. Technical Challenge II For the installation of some of today’s largest offshore turbines, a one-lift concept has been successfully used, involving the deployment of a floating crane Still, operations remain time-consuming and weather, wave and wind-sensitive. New concepts for installing Windturbines Offshore

23. The first all-in-one offshore turbine lift, Beatrice, UK

24. Using a Sheer Leg or an A-frame has the disadvantage of ‘multiplying effects’ on the movement of the vessel, or barge in larger displacements of the load carried by the hook of the crane. New concepts for installing Windturbines Offshore

25. Using a Sheer Leg or an A-frame has the disadvantage of ‘multiplying effects’ on the movement of the vessel, or barge in larger displacements of the load carried by the hook of the crane. Lifting the load in the centre of gravity of the crane vessel will substatially reduce this effect New concepts for installing Windturbines Offshore

26. Displacements standard Sheerleg or Crane Vessel

27. Displacements when load is in centre of gravity

28. In order to meet the need for suitable and efficient equipment in installing increasingly larger and powerful turbines, new concepts have to be developed if the offshore wind energy sector wishes to contribute to the European targets set with respect to renewable energy. New concepts for installing Windturbines Offshore

29. In the floating crane concept optimum use can be made of water forces. A solution should be sought to maintain maximum stability combined with maximum lifting capacity, as required. And the problem to be solved is how to control acceleration forces at ‘touch-down’, New concepts for installing Windturbines Offshore

30. Ballast Nedam has developed a concept to control touch- down operations in a one-lift concpt with a floating crane. The result is a combination of a soft-landing and holding device. The principle behind the controlled operation is that before touch-down the tower will be indirectly connected to the foundation with a device that introduces a pre-stressed connection which compensates the accelerations during touch-down. New concepts for installing Windturbines Offshore

31. Thus, it is possible to install the heaviest and largest wind turbines in one single controlled and wave-independent operation. New concepts for installing Windturbines Offshore

32. The greatest advantage demonstrated by our concept is not primarily formed by the mere installation costs themselves, New concepts for installing Windturbines Offshore

33. The greatest advantage demonstrated by our concept is not primarily formed by the mere installation costs themselves, but much rather the fundamental fact that the one-lift concept is actually possible and feasible; New concepts for installing Windturbines Offshore

34. The greatest advantage demonstrated by our concept is not primarily formed by the mere installation costs themselves, but much rather the fundamental fact that the one-lift concept is actually possible and feasible; that the entire commissioning and testing process can be completed onshore, New concepts for installing Windturbines Offshore

35. The greatest advantage demonstrated by our concept is not primarily formed by the mere installation costs themselves, but much rather the fundamental fact that the one-lift concept is actually possible and feasible; that the entire commissioning and testing process can be completed onshore, and finally that we have decreased the number of weather, wave and wind-sensitive operations to be held offshore. New concepts for installing Windturbines Offshore

36. This presents a truly revolutionary step in risk mitigation and thus in cutting back overall costs New concepts for installing Windturbines Offshore

37. Ballast Nedam Innovation: The One Lift Concept New concepts for installing Windturbines Offshore

38. PRESS RELEASE Ballast Nedam, 13 March 2009 “BN has developed a frame that enables the heavy lift vessel Svanen to pick up complete heavy windmills in the harbour, transport them to the offshore location, and then install them on site. This development renders unnecessary the assembly of wind turbines from multiple modules in expensive and risky offshore time.” New concepts for installing Windturbines Offshore

40. Technical details

43. Animation One Lift Concept

44. Another and recent Innovation: The Drilled Concrete Monopile New concepts for installing Windturbines Offshore

45. PRESS RELEASE Ballast Nedam, 13 March 2009: “The technical feasibility of a drilled prefabricated concrete pile as an offshore wind turbine foundation has been demonstrated. The advantages of this foundation are: Reduced noise levels (no percussion), lower manufacturing costs, greater price stability of concrete compared with steel.” New concepts for installing Windturbines Offshore

46. Drilled (concrete) monopiles, based on existing technologies

47. (Drilled) concrete monopiles, based on existing technologies The pile will be built up from vertically poured ring elements which are stored vertical to avoid ovalization and are assembled horizontally.

48. Drilling and installing of a concrete monopile Step 10: Continue drilling until target level is reached.

49. Drilling and installing of a concrete monopile with HLV Svanen 49

50. www.ballast-nedam.com NEW CONCEPTS FOR INSTALLING WINDTURBINES OFFSHORE

51. merci beaucoup