NEW CONCEPTS FOR INSTALLING WINDTURBINES OFFSHORE - PowerPoint PPT Presentation

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NEW CONCEPTS FOR INSTALLING WINDTURBINES OFFSHORE

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  1. NEW CONCEPTS FOR INSTALLING WINDTURBINES OFFSHORE

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

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

  5. Tradition in developpinginstallationconcepts: HLV Svanen installing Wind turbine Foundations at Egmond, NL

  6. Tradition in developpinginstallationconcepts: 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. New concepts for installing Windturbines Offshore 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

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

  11. Present Windturbine installation method

  12. Other concepts in development

  13. New concepts for installing Windturbines Offshore The Challenges

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

  15. New concepts for installing Windturbines Offshore 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

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

  17. New concepts for installing Windturbines Offshore 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

  18. New concepts for installing Windturbines Offshore 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.

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

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

  21. New concepts for installing Windturbines Offshore 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

  22. New concepts for installing Windturbines Offshore 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.

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

  24. New concepts for installing Windturbines Offshore 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.

  25. New concepts for installing Windturbines Offshore 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

  26. Displacements standard Sheerleg or Crane Vessel

  27. Displacements when load is in centre of gravity

  28. New concepts for installing Windturbines Offshore 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.

  29. New concepts for installing Windturbines Offshore 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’,

  30. New concepts for installing Windturbines Offshore 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.

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

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

  33. New concepts for installing Windturbines Offshore 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;

  34. New concepts for installing Windturbines Offshore 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,

  35. New concepts for installing Windturbines Offshore 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.

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

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

  38. New concepts for installing Windturbines Offshore 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.”

  39. New concepts for installing Windturbines Offshore

  40. Technical details

  41. Technical details

  42. Technical details

  43. Animation One Lift Concept

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

  45. New concepts for installing Windturbines Offshore 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.”

  46. Drilled (concrete) monopiles, basedonexistingtechnologies

  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

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