A Tower cools 875gpm from 95 degreesF to 85 degreesF at 72 degreesF

wet bulb temperature. What is the:

**Range** = Inlet Temp - Outlet Temp

(ex: Range = 95 - 85 = 10 degreesF)

**Approach** = Out Temp - Wet Bulb Temp

(ex: Approach = 85 - 73 = 13 degreesF)

**Heat Rejection** = Flow_{Gpm} X Range_{DegF} X 500

(ex: Heat Rejection = 875 x 10 x 500 = 4,375,000btu/hr = 4,375 MBH)

**Typical Drift Loss** = .002% X Recirculated Flow Rate

(ex: Typical Drift Loss = .00002 X 875 = .0175Gpm)

**Evaporation Rate**_{Gpm} = Flow_{Gpm} X Range_{degF} / 1,000

(ex: Evaporation Rate = 875 X 10 / 1,000 = 8.75gpm)

**Bleed Rate**_{Gpm} = Evap. Rate_{Gpm} / (Cycles-1)

(ex: Bleed Rate_{3 Cycles} = 8.75 / (3-1) = 4.4Gpm)

**Make-up Water Requirement**_{Gpm} = Evaporation Rate_{Gpm} X [Cycles/(Cycles-1)]

(ex: Make-up_{at 3 cycles} = 8.75Gpm x 3/2 = 13.1Gpm)

EQUALIZER SIZE CHART