Cooling Tower Formulas

Where

T1 Hot water temperature entering to cooling tower
T2 Cold water temperature leaving from cooling tower
Wb Design wet bulb temperature
Coc Cycle of concentration
 
Cooling tower Range T1-T2
Cooling tower approach T2-Wb
Evaporation Loss (M3/Hr) 0.00085 x 1.08 x Flow rate (M3/HR) x Range
Cooling tower effectiveness (%) Range/ (T2-Wb) x 100
Blow down losses Evaporation losses / (COC-1)
1 Cooling tower ton 15000 BTU/Hr
1 Refrigeration ton 12000 BTU/Hr
Pressure in PSI Head in feet/2.31
1 Bar 14.7 PS