COOLING TOWER CALCULATIONS

The method by which heat is removed from an open recirculating cooling water system is evaporation (E) of some of the water over a tower. The amount of temperature reduction that can be accomplished by evaporation at any time is limited to the wet-bulb temperature or simply, the relative humidity. A high relative humidity lowers the evaporation rate; dry conditions encourage a higher evaporation rate. Seasonal humidity conditions are an important consideration in tower sizing, design, and placement.