Design of control structure for heat exchanger network with pinch move

Abstract

Heat exchanger network (HEN) is an effective method to recover the heat energy used in process plants. However, transference of heat within the enclosure cause the interactions and may cause the process more difficult to maintain the target temperature. This research presents law and procedure for design control structure of heat exchanger network using heuristic approach such as General design, Match pattern, Loop control selection, Bypass setting, split ratio and selector switch setting, to solve class II problem which is discontinuity in the pinch zone occurred, the so-called "pinch-jump". It has been shown that our procedure is able to maintain target temperatures at specified values. Furthermore, this action should not violate maximum energy recovery. The heat exchanger network with control structures are programmed using HYSYS for control structure performance tests.