Fuzzy Analogical Gate to Select the Best Design of Heat Exchanger Network

This article shows a systematic method to choose the optimal minimum temperature in order to get a flexible HEN and more operable by utilizing the fuzzy analogical gate way for the tradeoff between two cost capital and operating for a given minimum temperature difference. By follow, three steps to choose the best minimum approach temperature 1) obtain minimum utilities target 2) obtain of the area of all HEN 3) fuzzy analogical gates to select the best minimum temperature difference. The recommended method was be conducted on two case studies well known in published literature yielded an optimum solution that is consistent with a different approach. It is clear the fuzzy analogical gate performance is completely hopeful; it is simple and has ability to be applied by manual calculations.