Closed-Circuit cooling tower, also known as Closed-Circuit cooler, closed cooling tower or closed loop cooling tower, is a cooling device that is designed to remove the heat of the process fluid, thereby cooling the process fluid. With coil exchangers placed in the tower, the whole cooling process is achieved through heat transfer among the air, spray water & circulating water via coil exchanger inside. Closed-Circuit cooling tower is an upgrade and replacement of open circuit cooling towers. The process fluid circulates in the coil, thereby eliminating the efficiency reduction and system failures caused by floaters, dirt and other matters entering the cooling water system. As a result, it is generally used for cooling projects that require high cleanness of process fluid.