AdapTIP Offshore Adaptive blade-Tip for Improving the turbine Productivity

Publieke samenvatting / Public summary

Increasing rotor blade length to optimally harvest wind energy for offshore power production has led to several difficulties. Costs for handling of large heavy constructions, transportation, installation, and decommissioning become extremely high, because large facilties, heavy transport and lifting equipment etc. are required. Also, dealing with heavy and large blades offshore during installation, replacement or decommissioning is only possible during a small weather window. During operation, the tip has the most erosion and damage, but in case of damage, full blades have to be replaced. The development of sectional blades can contribute to solving these problems and reduce the costs of offshore wind in the Dutch part of the North Sea.

AdapTIPtip's objectives are: minimise OPEX costs, minimize CAPEX costs, maximize the energy yield site specific. A sectional blade is a solution to reduce high costs to restore erosion, and/or damages related to high rotating speeds of the tip (OPEX). This is especially true for the final 10% of a 100m blade (e.g. 10-12m long part). Furthermore, it is important to lower the costs for logistics-commissioning and decommissioning for long wind turbine blades. Working with smaller pieces simply costs less, starting from blade lengths larger than 80m. Furthermore, with the solution new production technologies can be used and the tip part can be made adaptive for its application envelope. The latter means that a special tip can be made to harvest most of the local wind potential while maintaining the same loads envelope of the turbine.

Korte omschrijving
The project can be narrowed down into four work packages: Work package 1: Modular design The Scope of this work package is to design the sectional blade and investigate the behaviour of the individual components in the design. Work package 2: Assembled design: The Scope of this work package is to assess the mechanical behaviour of the assembled design of the sectional blade and improve the numerical model based on testing results. Work package 3: Validation: The Scope of this work package is to validate the sectional blade concept based on numerical analyses and limited testing. Work package 4: Procedural optimization requirements The Scope of this work package is to analyse the effects on the costs of offshore wind energy due to the innovation for the full life cycle.

A. Modular design B. Testing report C. Validated numerical analyses methodology D. Prototype on scale E. Testing report F. Full numerical model G. Test setup design methodology for limited size testing of sectional blades H. Prototype representative final solution I. Numerical validation report J. Testing report K. Cost Benefit Analysis result on 2 topics L. Report on best location to make segmentation. M. Report on AEP improvement with better LE shape control. N. Report on AEP improvement with bend-twist features included in the tip segmentation