Cooling Tower Calculator

Size cooling towers and calculate thermal performance metrics.

Calculation Method

Heat Load

Heat Rejection (BTU/hr)

Operating Conditions

Hot Water Temp (F)

Cold Water Temp (F)

Wet Bulb Temp (F)

Cycles of Concentration

Cooling Tower Design

Parameter	Typical Range
Range	10-15F
Approach	5-10F
GPM/Ton	3.0 GPM
Cycles	3-7

Formulas

Heat Rejection: Q = 500 x GPM x Range

Evaporation: E = 0.001 x Range x GPM

Blowdown: B = E / (Cycles - 1)

Makeup: M = E + B