VARIABLE SPEED CONTROL OF A CENTRIFUGAL CHILLER USING FUZZY LOGIC

摘要

A capacity control system for a refrigeration system including a compressor, acondenser, and an evaporator all connected in a closed refrigeration circuit,the compressor having a plurality of adjustable inlet guide vanes and drivenby an internal combustion engine, signals indicating the condenser pressure;the evaporator pressure; the inlet guide vanes position; the engine speed; thechilled water discharge temperature; and the engine intake manifold pressureare processed by a microprocessor to continuously calculate a surface speedand to equalize engine speed and calculated surface speed utilizing a fuzzylogic algorithm.