Contact: Maureen Gibson
Phone: (718)-430-4524
Fax: (718)-430-4510
E-Mail: mgibson@industrialacoustics.com

April 22, 2008

IAC America’s research laboratory helps provide coal to meet US energy needs

Bronx, NY (April 22) -- IAC America has received an order from a large coal company to silence coal mine exhaust ventilation fans. These fans provide essential fresh air into the mines.

The extracted air from the mine is moist and laden with dust, so that conventional silencers would very quickly clog as the wet dust forms on silencer baffles and blocks the perforations in the baffle skins. The solution to this problem is to install IAC’s ACFI design silencer baffles in the existing exhaust evase of the fan.

Jonathan Weinstein is IAC America’s Director of Research and Development: “ACFI attenuation is achieved using tuned cavities which are impervious to blockage caused by the wet dust.” Recently IAC proved the ability of the ACFI design to provide the specification requirement minimum of 20 dB attenuation at the blade pass frequency of 190 Hz and 15 dB at the 380 Hz first harmonic. Weinstein again: “We successfully demonstrated this performance to the acoustical consultant and our customer with a ½ scale model in the IAC Aero-Acoustic Laboratory wind tunnel.”

With approximately 315,000 Megawatts of coal-based electrical generating capacity in the United States, coal plants account for 52% of the electricity generated. The reserves of coal in the US stand at 275 billion tons, an amount that is greater than any other nation in the world. These reserves are capable of meeting domestic demand for more than 250 years at current rates of consumption.

For more information contact Jonathan Weinstein, Director R&D on 718-430-4571 jweinstein@industrialacoustics.com

ENDS

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