AUTOMATIC ANTI-SURGE CONTROL FOR DUAL CENTRIFUGAL COMPRESSOR SYSTEM

摘要

AUTOMATIC ANTI-SURGE CONTROL FORDUAL CENTRIFUGAL COMPRESSOR SYSTEMABSTRACT OF THE DISCLOSUREA control system for controlling the capacity of a leadcompressor of a refrigeration system having a lead and lagcompressor when the lag compressor is in surge. A microcom-puter system receives electrical input signals indicative ofthe lead and lag motor currents and closes the inlet guidevanes of the lead compressor when the lag compressor percentmotor amps are below the lead compressor motor amps by morethan a selected percentage for a specified period of time.