Erfan Ziarifar - Young Researchers club- Islamic azad university of Ahvaz,Amir Kabir Petrochemical
Soroush Zarin abadi - Scientific Board Member of Islamic Azad University, Ahvaz Branch
behnam amini - Islamic Azad University, omidiyeh Branch
Kamran vakili - Islamic Azad University, omidiyeh Branch

The task of an open cooler tower is to absorb the heat from a process and to pass it into the atmosphere, which is mainly conducted through the action of evaporation.Since the water participating in the process of cooling is circulated in the cooler tower circuit, the concentration of its minerals increases thanks to its gradual evaporation.When the concentration of the minerals becomes twice as much as its initial amount, it is said that water has two cycles of concentration when the concentration of the minerals in water becomes three time :as much as its initial amount , then water has two cycles of concentration .The application of this section is very significant for effective and economic utilization .in order to be sure of the minimum transfer of heat ,the surfaces of heat transfer should be kept clean as much as possible .if the concentration of the minerals increases in cooling tower ,the possibility of gathering the erosion increases .accordingly ,water treatment will lead to more effective utilization of heat transfer unit