Cooling Tower Water Use

Cooling Tower Water Use

Ever wonder how increasing or decreasing the “cycles of concentration” will affect water usage in your cooling system?

The following table will help to estimate the water consumed by the evaporative cooling process, windage loss, and controlled system water bleed-off.

The figures below apply to non-absorption cooling systems with a 10 degree Fahrenheit temperature drop across the tower operating at peak-designed load.
Gallons per 100 tons per hour

Cycles of
Concentration
Evaporation
Rate
Bleedoff and
Windage Loss
Total Water
Makeup
1.5 180 360 540
2 180 180 360
2.5 180 120 300
3 180 90 270
3.5 180 72 252
4 180 60 240
4.5 180 51 231
5 180 45 225
6 180 36 216
7 180 30 210
8 180 26 206
9 180 22 202
10 180 20 200
12 180 16 196
14 180 14 194
16 180 12 192
18 180 10 190
20 180 9 189

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