The Omran Series V Closed Circuit Cooling Tower combines the functions of an open cooling tower and heat exchanger by replacing the wet deck surface with a coil type heat exchanger. The liquid to be cooled is circulated through a continuous serpentine coil, which is continually wetted on the outside by a recirculating water system.
Air is simultaneously blown upward over the coil, causing a small portion of the recirculated water to evaporate. This evaporation removes heat from the coil, cooling the liquid in the coil.