Cooling Tower
The heat extraction capability of an evaporative cooling water tower is theoretically limiless. In practice, manufactured towers are normally used to remove from 50 kW to 10,000 kW of heat from cooling water systems and is the most efficient method of cooling water.
In Closed Circuit Cooling Tower process water is circulating through the tower via a multiple circuit serpentine coil. Independent secondary cooling water is sprayed over this coil via a small pump. Air is forced through the coil coming into contact with this secondary cooling water, using the latent heat of evaporation heat is extracted from it. The cooled process water leaves the cooling tower and is pumped to the process to remove further heat in a continuous operation. The process water system is totally closed and sealed from atmospheric contamination.
In Open Cooling Towers process water is sprayed in a thin film over an extended surface fill pack. Air is forced through the pack using the latent heat of evaporation heat is extracted from it. The remaining water, having had this heat extracted from it, returns to the sump of the cooling tower for re-circulating to the process to remove further heat.
