System and method to reduce acoustic noise in screw compressors

Details System and method to reduce acoustic noise in screw compressors System and method to reduce acoustic noise in screw compressors

2004-07-20

2008-08-19

Koczo, Jr., Michael (Department: 3746)

Pumps

Processes

C417S410100

Reexamination Certificate

active

07413413

ABSTRACT:
A system is provided for attenuating tonal acoustic noise associated with a single positive displacement compressor, or multiple positive displacement compressors proximately located from each other. A controller selectably controls the rotational speed and the frequency of operation of each of the compressors. The controller controls the rotational speed of the compressors about a predetermined rotational speed, in a random manner, within the pre-selected speed band to reduce the magnitude of the central tonal acoustic frequency of the pressure pulsations and disperse the sound power over a wider acoustic bandwidth.

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