armour EDGE will minimise aerodynamic losses, which could have a typical value of £3 million to £4 million in increased revenue generation per offshore wind farm per year.

armour EDGE delivers optimal aerodynamic performance, which maximises Annual Energy Production (AEP), minimises Operational Expenditure (OpEx) and strengthens Return on Investment (ROI) for Owners/Operators. Various Owners/Operators and OEMs have conducted tests, which concluded the application of some LEPs results in an immediate reduction in AEP of 1% to 2% due to poor aerodynamics.

An aerodynamic performance assessment of armour EDGE was conducted using Computational Fluid Dynamics (CFD), as part of an Interface Project between armour EDGE and Heriot Watt University, to study the impact of the erosion shields on the aerodynamic performance of the blade they are to protect. Analysis of the CFD results concluded that after simulating the attachment of erosion shields at various points on the Leading Edge (LE), under various typical operational wind speeds, there is a ‘non-effect’ on aerodynamic performance when the erosion shield is applied. Profiles at critical locations along the blade of an NREL 5MW wind turbine were simulated using CFD with and without the shield in order to make a comparison of the lift and drag of each scenario. For each profile that was tested, two freestream wind speeds were simulated that reflect normal operating conditions of the chosen wind turbine: 7.0 m/s and the rated wind speed of 11.4 m/s.

Catapult delivers first blade leading edge erosion measurement campaign

Press Release: August 15th 2016

Offshore Renewable Energy (ORE) Catapult, in collaboration with Centrica, has successfully delivered the first in-field measurement campaign under its industry-leading blade leading edge programme (BLEEP), and concluded that an uplift in AEP of between 1.5% to 2% is possible following the repair of moderate blade erosion.
N.B For a typical 500MW UK offshore windfarm, a 1.5% uplift in AEP could amount to as much as £3.5 million increased revenue generation per wind farm. However, this figure is subject to a number of assumptions, including:

  • Number of turbines: 139
  • Capacity factor: 38%
  • Revenue per MWh: £140
  • Average wind speed: 9m/s
  • All turbines respond consistently to a moderate level of erosion, and no consideration is given to a change in level of erosion over time.
Exceptional aerodynamic performance assessment of armour EDGE
CFD mesh creation
CFD Mesh Convergence