Abstract:
Energy recovery by heat exchanger network is the important stage in chemical process. The energy integration causes to the interactions and may make the process more difficult to control. Therefore, in order to achieve maximum energy recovery and keep target temperatures at their desirable value, the control structures of energy exchanger networks are important. This research presents rules and procedure for design control structure of heat exchanger network using heuristic approach. The rules devised in this work are categorized as following: generals, match pattern, loop placement, bypass placement, and split fraction rules. The design procedure is very simple to understand and all the control structure design steps can be followed intuitively. In this research, 6 alternative control structures of 3 networks are designed. It's shown that the network with control structure designed using our procedure gives minimum the integral time absolute error, compared to the other network found in the literature while maintain maximum energy recovery and achieves outlet temperature target. The heat exchanger network with control structures are programmed using Matlab for control structure performance tests.