Patent ID: 6516622
Filing Date: 2003-02-11
Classification: B01D,F04B,F04C,F25B

Abstract:
An apparatus for controlling the operating speed of at least one variable speed refrigeration compressor in a refrigerated gas drying system having changing demand on a gas supply, the apparatus comprising:a first heat exchanger circuit for drying a gas supply; a demand sensor capable of sensing changes in the demand on the gas supply and generating a change in demand signal; and a motor speed controller that receives the change in demand signal to generate a motor speed signal, wherein the motor speed controller is adapted to send the motor speed signal to the at least one variable speed compressor to change the speed of the at least one variable speed compressor to change the speed of the at least one variable speed compressor such that the speed of the at least one variable speed compressor is based on the sensed demand.