Vestas Sound Power Optimisation

Product catalog summary

Siting Methods
Vestas employs industry-leading siting methods as the initial step in sound power optimisation. This involves using a DNV-certified siting process and advanced tools like Computational Fluid Dynamics (CFD) modelling to optimise wind turbine layouts according to sound power levels and requirements.

Operational Strategies for Sound Power Levels
Vestas wind turbines feature multiple Sound Optimised Modes tailored to meet market-specific requirements. These modes, combined with application variables such as time, wind speed, and direction, create a customised sound mitigation strategy. The goal is to maintain optimal performance by adjusting operational parameters only when necessary.

Sound Mitigation Strategy
Sound Optimised Modes and application variables can be applied individually or together to meet specific site conditions. An example configuration includes a sound level of 98 dB(A) during specific times and conditions, such as from 20:00 to 06:00 on workdays, with wind speeds from 10.5 to 17.6 m/s and wind directions from 28 to 136 degrees.

Advanced Technology for Lowering Sound Power Levels
The primary source of sound emission in wind turbines is aerodynamic noise. Vestas reduces this through technologies like OptiTip®, aerodynamically optimised blades, and Serrated Trailing Edge technology. OptiTip® adjusts blade pitch angles to maintain optimal sound levels, while the aerodynamic blade design and Serrated Trailing Edge technology reduce turbulence and noise.

Serrated Trailing Edge Technology
This technology reduces aerodynamic noise by mixing airflows along the blade's trailing edge, achieving a sound power reduction of 1-3 dB(A) without affecting power generation. It is available for all Vestas turbines within the 2 and 4 MW platforms.

Impact of Serrated Trailing Edge Technology
The technology significantly reduces sound power levels, as demonstrated in the V136-3.45 MW® turbine with a 3.6 MW Power Optimised Mode. The actual performance varies based on site-specific conditions.

Catalog excerpts

Vestas Sound Power Optimisation Combining siting methods, sound mitigation strategy, and technical solutions to maximise energy production at specific sound power levels Sound Mitigation Strategy: Sound Optimised Mode and application variables can be applied individually or in combination to meet site specific conditions and requirements. Application variables include, time of day, week day, date range, wind speed, and wind direction. Example • Sound Optimised Mode: 98 Db(A) • Time: From 20:00 to 06:00, Workdays only, from 3 April to 31 October • Wind speed: From 10.5 to 17.6 m/s • Wind direction: From 28 to 136 degrees Siting Methods Vestas’ industry-leading siting methods is the first step in sound power optimisation. In order to optimise layouts according to sound power levels and requirements, Vestas Wind and Site engineers consistently deploy Vestas’ DNV-certified siting process and advanced tools, including Computational Fluid Dynamics (CFD) modelling. Operational strategies for sound power levels Vestas’ wind turbines benefit from the availability of multiple Sound Optimised Modes configured to meet known requirements in relevant markets. These modes can be combined with application variables to create a tailored sound mitigation strategy to meet unique site specific conditions. Sound power emission is controlled by optimising the operational parameters of the turbine. Optimal performance is achieved by only deviating from maximum energy production when needed, due to a specific time, wind speed or

Open the catalog to page 1

Impact of Serrated Trailing Edge technology Without STEs Sound Power Level dB(A) With STEs Vestas’ Serrated Trailing Edge (STE) technology mixes the airflows, securing optimal airflow around the blade profile, resulting in a reduction of sound power level by up to 3 dB(A). Example based on V136-3.45 MW® with 3.6 MW Power Optimised Mode. Actual performance depends on site specific conditions. Serrated Trailing Edge technology is a standard option for all Vestas 4 MW platform turbines. Advanced technology lowering base sound power levels The dominant source of sound emission by wind turbines is...

Open the catalog to page 2