The study also attempted to choose the best design parameters and the optimal operating conditions to attain the highest efficiency while maintaining the annual cost at the lowest. Aspen plus® and Aspen exchanger design and rating (EDR)® software V10 have been implemented for design simulation and optimization. Calculations and control those factors that are connected to the efficiency (mechanical and thermal effects ). Accordingly, different scenarios were carried out to reach the optimum design and decreasing the associated cost at the lowest possible. The study results were promising and...