Solution noise reduction
Noise reduction higher returns
Reduce curtailment
PowerCurve’s noise reduction solutions help wind asset owners operate within site-specific noise restrictions without unnecessary production losses.
By reducing aerodynamic noise generation at the blade trailing edge, the solutions support improved operational flexibility, increased energy capture, and stronger long-term project economics.
Noise reduction solutions for wind turbine blades
Reduce noise
Aerodynamic blade upgrade solutions developed to help wind asset owners reduce noise emissions, minimize curtailment losses, and maintain turbine revenue generation under increasing noise restrictions.
The trailing-edge add-ons reduce aerodynamic noise at the source by optimizing airflow behavior around the blade surface. This lowers overall sound pressure levels and allows turbines to operate closer to nominal power output while remaining compliant with site-specific noise requirements.
Depending on turbine platform and operating conditions, the solutions can reduce overall noise emissions by up to approximately 5 dB(A) OASPL.
For asset managers and operators, this contributes to:
- Reduced production losses from noise-related curtailment
- Increased annual energy production (AEP)
- Improved project cash flow and asset economics
- Greater operational flexibility under regulatory constraints
- Better utilization of existing wind assets
The solutions are developed for integration with existing turbine fleets and offer a commercially attractive alternative to permanent derating or other production-limiting operational strategies.
Typical noise reduction drivers
1. Close proximity to residential areas
- Nighttime noise limits often reduce turbine operating flexibility
- Noise restrictions can force turbines into lower power modes
- Curtailment periods may reduce annual project revenue
- Increased community focus on operational noise performance
2. Local noise regulations
- Regulatory noise limits can force turbines into curtailment modes Site permits may restrict operation under specific wind conditions
- Compliance requirements can reduce annual energy production (AEP)
- Operators face increasing pressure to maintain compliance without sacrificing profitability
3. Increasing turbine size and rotor speed
- Larger rotor diameters generate higher aerodynamic loading and noise
- Modern turbines operate closer to site-specific noise thresholds
- Increased rotor speeds amplify trailing-edge noise generation
- Higher energy capture potential increases the financial impact of curtailment losses
Benefits
- Aerodynamic noise reduction retro fit
- Stay compliant with noise regulations
- Can be combined with existing blade add-ons
- Load neutral solutions
Reduce noise without reducing performance
PowerCurve’s noise reduction solutions reduce aerodynamic noise generated at the blade trailing edge by modifying the interaction between turbulent airflow and the blade surface. The solution stabilizes the boundary layer flow and reduces pressure fluctuations responsible for acoustic emissions during turbine operation.
By lowering the overall turbine noise level, turbines can operate with fewer noise-related restrictions and reduced dependence on low-noise operational modes. This helps maintain annual energy production while ensuring compliance with local noise regulations.
The solution is designed as a load-neutral retrofit compatible with existing blade add-ons and standard turbine configurations, allowing integration without significant impact on turbine operation or structural loading.
How aerodynamic noise is reduced
The dominant aerodynamic noise from a wind turbine is generated at the blade trailing edge, where turbulent airflow interacts with the blade surface and creates pressure fluctuations that radiate as sound.
PowerCurve’s noise reduction solution modifies the airflow behavior in this region by optimizing the trailing-edge geometry. This changes the scattering mechanism responsible for converting turbulence in the boundary layer into aerodynamic noise.
By reducing turbulence-induced pressure fluctuations, the solution lowers overall turbine noise emissions while maintaining aerodynamic efficiency. This allows turbines to operate closer to normal operating modes with reduced need for noise-related curtailment and associated AEP losses.
How performance is validated
Performance improvements are evaluated using:
- SCADA-based operational data
- Before/after noise measurements
- Power curve comparison under noise-constrained operation
Our noise reduction solutions
PowerCurve develops, manufactures, and supplies aerodynamic noise reduction solutions for existing wind turbines.
The solutions are designed to reduce trailing-edge noise generation while maintaining aerodynamic efficiency and annual energy production (AEP).
Our solutions typically consist of engineered trailing-edge add-ons and aerodynamic blade modifications developed specifically for the turbine platform and operating environment.
All designs are based on aerodynamic and aeroacoustic modelling using CFD, combined with empirical data from field installations and operational analysis.
Each configuration is adapted to:
- Turbine type and blade geometry
- Blade aerodynamic profile and trailing-edge characteristic
- Operational noise constraints and curtailment strategy
- Site-specific conditions including wind class, turbulence intensity and proximity to residential areas
- Existing blade add-ons and surface condition
The solutions are engineered to remain load-neutral and compatible with standard turbine operation and maintenance procedures.
Our technolgy
SilentEdge
SilentEdge is a trailing-edge aerodynamic retrofit solution developed to reduce noise emissions from wind turbine blades under real operating conditions.
The solution is installed at the blade trailing edge, where turbulent boundary layer flow interacts with the blade geometry and generates aerodynamic noise through pressure fluctuations and scattering effects.
By modifying the trailing-edge geometry, SilentEdge changes the scattering behavior responsible for converting turbulence into acoustic emissions. This reduces overall turbine noise levels while maintaining aerodynamic performance and minimizing the need for noise-related curtailment.
The geometry is optimized through aerodynamic and aeroacoustic analysis to ensure effective noise reduction with minimal impact on blade loads and turbine operation.
Click here to see our CTO, Nicholas Gaudern explain the blade serrations
+ 14 year
in operation
Since 2012 PowerCurve has been a trusted partner in wind turbine blade optimization
+ 125 GWh
annual added energy
Our installed blade upgrade solutions annually produce more than 125GWh of added energy
+ 28.000
households
Every year our solutions provide added energy equal to more than the consumption of 28.000 households
+ 2.000
blade upgrades
More than 2.000 upgraded wind turbine blades operate with PowerCurve aerodynamic solutions
“Testimonals, testimonals, lirum larum, Testimonals, testimonals, lirum larum
– Liram larum, Testimonals at Power up Power
Download material
Noise reduction brochure (PDF)
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PowerCurve is an independent global provider of blade upgrade solutions and consultancy services