Water Make-Up Requirements of Cooling Towers

• 
  Model shown: TC-270F

• Evaporative cooling towers, like the ADVANTAGE Power Tower® Series, provide cooling by evaporating a small amount of the recirculated process water flow.
• Approximately 1,000 BTU’s are required to evaporate .12 gallons of water. Therefore, every tower ton (15,000 BTU/hr) requires approximately 1.8 gallons of water evaporation, or .03 gpm/ton.
• As water evaporates in a cooling tower system, the water vapor enters the atmosphere while any dissolved solids remain behind, building concentration in the remaining water.
• Most water treatment systems control this concentration by bleeding off the high concentration water, which is made up by fresh city water with a lower solid concentration. The amount of water that is bled off by the water treatment system is usually less than or equal to the amount of water that evaporates.
• Therefore, the maximum normal water makeup for a cooling tower system is .06 gpm / ton, or about 2% of the nominal tower flow rate.
• The following chart specifies the Maximun Water Make Up requirement per model.

The following chart specifies the Maximun Water Make Up requirement per model.

• Advantage Model # : TC-45F
• Tower Capacity : 45 (Expressed in Tons)
• Maximum Evaporation : 1.35 (At Designed Capacity Shown in GPM)
• Nominal Tower Flow Rate : 135 (Shown in GPM)
• Maximum Water Make-Up : 2.7 (At Designed Capacity Shown in GPM)

• Advantage Model # : TC-85F
• Tower Capacity : 85 (Expressed in Tons)
• Maximum Evaporation : 2.55 (At Designed Capacity Shown in GPM)
• Nominal Tower Flow Rate : 255 (Shown in GPM)
• Maximum Water Make-Up : 5.1 (At Designed Capacity Shown in GPM)

• Advantage Model # : TC-105F
• Tower Capacity : 105 (Expressed in Tons)
• Maximum Evaporation : 3.15 (At Designed Capacity Shown in GPM)
• Nominal Tower Flow Rate : 255 (Shown in GPM)
• Maximum Water Make-Up : 6.3 (At Designed Capacity Shown in GPM)

• Advantage Model # : TC-135F
• Tower Capacity : 135 (Expressed in Tons)
• Maximum Evaporation : 4.05 (At Designed Capacity Shown in GPM)
• Nominal Tower Flow Rate : 405 (Shown in GPM)
• Maximum Water Make-Up : 8.1 (At Designed Capacity Shown in GPM)

• Advantage Model # : TC-170F
• Tower Capacity : 170 (Expressed in Tons)
• Maximum Evaporation : 5.10 (At Designed Capacity Shown in GPM)
• Nominal Tower Flow Rate : 510 (Shown in GPM)
• Maximum Water Make-Up : 10.2 (At Designed Capacity Shown in GPM)

• Advantage Model # : TC-210F
• Tower Capacity : 210 (Expressed in Tons)
• Maximum Evaporation : 6.30 (At Designed Capacity Shown in GPM)
• Nominal Tower Flow Rate : 630 (Shown in GPM)
• Maximum Water Make-Up : 12.6 (At Designed Capacity Shown in GPM)

• Advantage Model # : TC-270F
• Tower Capacity : 270 (Expressed in Tons)
• Maximum Evaporation : 8.10 (At Designed Capacity Shown in GPM)
• Nominal Tower Flow Rate : 810 (Shown in GPM)
• Maximum Water Make-Up : 16.2 (At Designed Capacity Shown in GPM)

• Advantage Model # : TC-405F
• Tower Capacity : 405 (Expressed in Tons)
• Maximum Evaporation : 12.15 (At Designed Capacity Shown in GPM)
• Nominal Tower Flow Rate : 1,215 (Shown in GPM)
• Maximum Water Make-Up : 24.5 (At Designed Capacity Shown in GPM)

• Advantage Model # : TC-540F
• Tower Capacity : 540 (Expressed in Tons)
• Maximum Evaporation : 16.20 (At Designed Capacity Shown in GPM)
• Nominal Tower Flow Rate : 1,620 (Shown in GPM)
• Maximum Water Make-Up : 32.4 (At Designed Capacity Shown in GPM)

For more information about water make-up requirements and cooling tower systems call the Advantage Sales Department at 317-887-0729.

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