Dinâmica e controle de redes de trocadores de calor

Abstract

A broadly used equipment in industries is the heat exchanger, which can be organized in different ways, with concurrent or countercurrent flows, double pipe, shell tube, plates and even associated with more than one equipment operating concomitant and interconnected. Thereby it is necessary the control of these associations, named heat exchanger networks, to ensure a great efficiency with less energetic and utilities consumption, in addition to meeting the imposed specifications. The case study shows a reaction process followed by separation with two currents to be cooled and two to be heated for achieving energy integration. For such a methodology is proposed that starts from the creation of the heat exchangers network aiming lower utilities consumption, goes through an optimization to reduce the numbers of equipment, dynamic simulation to evaluate the model behavior and concludes with feedback control tuning of the output temperatures of the currents that make up the network.