How to Build an Offshore Windmill

Abstract

The invention relates to a method for building an offshore windmill (100) on a windmill foundation (50) located at sea. The method comprises: i) setting up a pontoon (900) including a 3D heave compensated crane (910) on its deck (901); ii) setting up at least one offshore windmill assembly (110, 120, 130) and lifting A machine (90), wherein the offshore windmill assembly comprises a wind turbine (120), a plurality of windmill blades (130, 130-1...130-3) and at least two windmill column parts ( 110, 110‑1... 110‑3), wherein the lift (90) is configured for receiving a windmill column (110‑1... 110‑3) in its receiving area; iii) said pontoon ( 900), the lifting machine (90) and at least one offshore windmill assembly (110, 120, 130) are moved to the vicinity of the windmill base (50); iv) using the 3D heave compensation crane (910) to move the lifting machine (90) directly placing on the windmill base (50), and securing the weight lifter (90) to the windmill base (50) so that it can be subsequently removed, wherein the weight lifter (90) is secured to the windmill base (50) , so that the windmill columns (110‑1...110‑3) can be placed directly into the receiving area on the windmill foundation (50); v) install the wind turbine (120) using a 3D heave compensation crane (910) ; vi) using 3D heave compensation crane (910) and lifting machine (90) to partially erect the windmill column (110‑1...110‑3) on the windmill base (50); vii) on the windmill column ( 110‑1...110‑3) have been partially erected, using a 3D heave compensation crane (910) to install windmill blades (130, 130‑1...130‑3) on wind turbines (120) ; viii) fully erecting the windmill uprights (110‑1...110‑3) on the windmill base (50) using at least a lifting machine (90), and ix) using a 3D heave compensated crane (910) from the windmill base ( 50) Remove the weight lifter (90). The present invention provides a further improved retrofit method for building offshore windmills.

Description

technical field [0001] The present invention relates to a method of building an offshore windmill on a windmill base (pedestal, pedestal) located offshore (offshore, offshore). Background technique [0002] Offshore wind energy is becoming increasingly important. Especially in the past few years, the number of wind farms (grids of windmills installed on continental shelves in the sea) has increased significantly. Not only is the number of offshore windmills increasing, but their size is also increasing, ie windmills are getting bigger and bigger. The increase in size of offshore windmills presents new challenges in terms of the practical installation of these offshore windmills. Special purpose giant ships have been built on which very large heavy cranes are placed. The general idea is to build windmills on land in as large components as possible, and then transport these components to the desired location, where they are placed on previously prepared offshore windmill fo...

AI Technical Summary

Problems solved by technology

[0006] A first disadvantage of the windmills and installation methods described above is that they are not retrofit (retrofit) solutions, ie they cannot be applied to existing offshore windmill foundations

Furthermore, the method and windmill are not easily scalable in size

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