عنوان مقاله [English]
The purpose of this study is to determine the optimal operating conditions in the aspect of economic and operational performance of air coolers. Air-cooled heat exchangers are often used in industrial applications where a reliable source of water is not available as a cooling medium. Today, various methods such as bypassing the air flow, using damper, and controlling fan motor speed are used to optimize the air cooler efficiency. In this study, Aspen-HTFS (Acol+) is used to achieve the optimum geometry. Essentially, the correct optimal structure is provided by an economic trade-off between the operating and the capital cost. The trade-off between operating and capital cost was done to improve the efficiency of air cooler at Tehran Oil Refining Company and resulted in a 29% power saving.