Calling for entries from companies and consortia interested in undertaking a study to investigate waked turbulence intensity (TI) in the context of GW scale large Offshore Wind Farms (OWFs) and evaluate existing methods for assessing TI to inform the development of new guidance for modelling TI for large turbines and wind farms.
Large multi-gigawatt (GW) scale offshore wind farms face a significant amount of wind turbine interaction that causes not only several tens of per cent of Annual Energy Production (AEP) loss but also increased TI, leading to higher fatigue on turbines. Turbine interaction focused on wake-induced TI has not been well discussed compared to that for AEP.
To lower the levelised cost of electricity (LCOE), adopting the assumption of a longer lifetime during the pre-COD phase and extending the lifespan of existing wind farms are essential. Therefore, the industry needs new guidance on modelling wake-induced TI for large turbines and farms to assess whether the Frandsen model is still appropriate.
The research questions for this study are:
- Is there any opportunity to reduce conservatism in the existing standards is higher confidence in modelling can be achieved?
- Are the current assumptions in the Frandsen model still applicable to large turbines and in large GW-scale wind farms? If no, what is the impact?
- Are the current assumptions in the Frandsen model still appropriate when turbines breach the ABL? If no, what is the impact?
- Is there opportunity to use any conclusions from this project in developing new standards or changes to existing standards?
- Would a measurement campaign be required to validate conclusions from this project and what would that look like?
The deadline for clarification questions: 22 May 2025
The closing date to receive tender submissions is 11 June 2025 16:00 (BST)
All clarification questions and tender submissions should be sent electronically, by their respective deadlines to tom.wishart@carbontrust.com, with maria.gonzalez-martin@carbontrust.com in copy.
