Cooling Tower Calculations



Cooling Tower Calculations
	Parameter	Units	(Case #1)	(Case #2)	Metric Units	SMIC	(Case #2)
INPUT	Recirculation Rate (RR)	gpm			Recirculation Rate M^3/hr	2,000
	Delta T (dT)	Degrees F			Degrees C	5
	Concentration Ratio (CR)	cycles			cycles	3.5
	System Capacity	gallons			M^3	160
	Make-Up Calcium	ppm (CaCO3)			ppm (CaCO3)	88
	Make-Up Alkalinity	ppm (CaCO3)			ppm (CaCO3)	108
	Tower Target Alkalinity	ppm (CaCO3)			ppm (CaCO3)	380		FORMULAS
	Evaporation Constant (EC)	Typical = .00085	0.00085	0.00085	Typical = .00085	0.00085	0.00085	Approximately 0.85% of Recirc. Rate is Evaporated per 10 F (5.6 C) Delta T
CALCULATIONS	Evaporation Rate	gpm	0	0	M^3/hr	15	0	Evaporation = RR * dT * EC
	Blowdown Rate (BD)	gpm	0	0	M^3/hr	6	0	Blowdown Flow Rate = Evaporation / (CR-1)
	Blowdown Rate	MMLB/day	0.00	0.00	Tons (kg)/Day	146	0
	Make-Up Rate	gpm	0	0	M^3/hr	21	0	Make-Up Flow Rate = Evaporation + Blowdown
	Make-Up Rate	gpd	0	0	M^3/day	510	0
	Tower Calcium	ppm (CaCO3)	0	0	ppm (CaCO3)	308	0	Tower Calcium = Make-Up Calcium * CR
	Holding Time Index	hours	#DIV/0!	#DIV/0!	hours	18	#DIV/0!	HTI = 0.0116 * (Gallons Capacity/ gpm BD)             (metric) =0.693*System Capacity/BD Rate
	Acid Feed	#/day	#DIV/0!	#DIV/0!	kg/day	0	#DIV/0!	Acid Feed = (MU Alk.- (Target Alk./CR))*MU Flow
	Acid Feed	Gal/day	#DIV/0!	#DIV/0!	Liters/day	0	#DIV/0!