Efficient Retrofitting Approach for Improving Heat Recovery in Heat Exchanger Networks with Heat Transfer Intensification

Abstract

In this paper, an efficient design method is presented to implement heat transfer intensification technologies for increasing energy saving in industrial scale heat exchanger networks (HENs). First of all, the detailed models of shell-and-tube heat exchangers are utilized to estimate exchanger performances under normal and intensified conditions, and an optimization method based on simulated annealing is proposed to find appropriate retrofitting options in the existing HENs. Then, a novel retrofit approach based on the exchanger models and optimization method is introduced to retrofit HENs with several possible retrofit strategies, including exchanger relocations, heat transfer intensification, additional area, and stream repiping. Moreover, a new efficient software package (int-HEAT) is developed for the addressed retrofit problems. The interface of int-HEAT is designed to focus on a clear presentation of HEN retrofit procedure, which allows users to easily control all the retrofit stages. An industrial ...