Decoupling Control for Sub- and Transcritical Operation of CO

摘要

refrigeration cycles. Three inputs can be controlled with single loop PI control. The couplings between the two remaining system in- and outputs are online characterized as first-order time delay (FOTD) elements. A demonstrated ruleset allows the transformation of the FOTD parameters from one operating point to another. This ruleset is developed based on a physical Modelica model which characterizes the nonlinear system behavior. Finally, decoupling can be achieved for every operating point with only one identification process.