Industrial Noise and Vibration Centre

Low cost fan noise attenuation in the power industry


An article about the application of our Quiet Fan technology (QFt) to reduce the noise from large fans in the power industry has been published in Power Engineering International. The journalist suggests that the widespread adoption of the technology in this industry could reduce both capital and running costs very substantially compared with conventional fan silencing techniques – i.e. traditional attenuators, acoustic lagging and enclosures. He uses the 50MW Schiller biomass power station in the USA (the largest station of it’s kind) where the massive 2 storey ID fan shown below was modified in only 12 hours (that’s not a misprint – just 12 hours from noisy to quiet) to reduce the fan noise by 10dB at fraction of the cost and with less power consumption compared with conventional fan noise attenuation.

The journalist makes an interesting point in that it all seems perhaps too simple… It may be difficult for the industry to gets its head round the idea that instead of the massive engineering structures and extensive (costly) down-time historically assumed to be required, it is often possible to slip elegant aerodynamic aids inside the fan casing within a few hours that eliminate the noise problem at source – and without compromising fan efficiency (as is often the case with conventional silencers). The same argument applies to other industries such as cement and steel works fans. Whilst QFT has become established as best practice for this type of fan noise problem across many applications, some industries are “acoustically lagging” behind….

View the Power Engineering International fan noise control article here

View more examples of the fan noise attenuation technology on fans from 0.5 – 5m in diameter

View Quiet Fan technology video here

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