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Edward Lowton
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ARTICLE
Reduces noise on the fly
11 October 2013
Installation of ABB drives in an Air Handling Unit (AHU) at the British Airways’ Flight Training Centre means pilots are benefiting from a quieter Flight Simulator environment. The AHU is used to cool the flight deck and instruments on a Boeing 777 Flight Simulator.
Previously the AHU’s fan motor was run at constant speed but generated high noise levels. By using a 5.5kW ABB HVAC drive at 39Hz, the same flow rate can be obtained at a lower motor speed, resulting in a reduction in noise from 80 dBA to 73 dBA.
Reducing the unwanted background noise generated by the supply fan has made it easier for the crew to hear conversations and spoken instructions.
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