Tower Characteristics and Performance

Cooling tower characteristics can only be deduced from actual field tests. Tower characteristics are generally presented in the form of an empirical correlation. This correlation defines the relationship between the available 

Common practice is to neglect the effect of air velocity and develop the tower correlation in the form of a power law relation  

Tower performance is specified in terms of the cooling tower s range, approach, wet-bulb temperature and water rate. The rating of a tower is established by developing a series of charts that relates these variables. 

Rating factors correspond to tower units per gpm, which represents some functions of tower area in ft2/gpm. Hence, 

A cooling tower has been designed to handle 7650 gpm of hot water at a 15°F range and a 10°F approach to 70°F wet-bulb temperature. Determine the tower units of rated area. 

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