Patent ID: 6666049
Filing Date: 2003-12-23
Classification: F25J,G05B,Y02C

Abstract:
A method for operating a cryogenic plant comprising:(A) determining the expected optimal value range at a given time using a process model for at least one key performance indicator from the group consisting of plant power consumption, product recovery, PID loop performance, MPC steady state optimization, MPC model prediction and MPC dynamic performance; (B) monitoring the value of each of the key performance indicators for which an expected optimal value range has been determined; (C) alerting a plant operator when the value of a monitored key performance indicator is outside of the determined expected optimal value range for that key performance indicator; and (D) suggesting at least one action to the plant operator for adjusting the operation of the cryogenic plant so that the value of the monitored key performance indicator which is outside of the expected optimal value range for that key performance indicator is changed so that it is within the expected optimal value range for that key performance indicator.