Method and apparatus for refrigeration system control having electronic evaporator pressure regulators

Abstract

A method for refrigeration system control according to the invention includes identifying a lead circuit having a lowest temperature set point from a plurality of circuits, wherein each circuit includes at least one refrigeration case. The suction pressure set point for a compressor rack is initialized based upon the identified lead circuit, and a change in suction pressure set point is determined based on measured parameters from the lead circuit. The suction pressure set point is updated based upon the change in suction pressure set point. A first valve position for a first electronic evaporator pressure regulator associated with a first refrigeration circuit is determined based on the determined change in suction pressure set point, which is based upon the measured parameters from the lead circuit. A second valve position for a second electronic evaporation pressure regulator associated with a second refrigeration circuit is based upon a second measured parameter.

Dependencies are inferred from the claim text.