Abstract
We developed a computer program using the (NTU) method to determine the temperature profiles of the three fluids flowing in the heat exchanger, the minimum power consumed and the different costs in a counter-current triple concentric-tube heat exchanger in a steady state. A Genetic Algorithm (GA) is used to optimize the triple concentric-tube heat exchangers by determining the optimal diameter. Now we have only one optimum diameter which corresponds to the minimum total cost, unlike previous studies, where we had two optimal diameters, the first diameter corresponds to the maximum efficiency and the second diameter corresponds to the minimal energy consumption required to overcome the pressure drop.
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