冷却塔计算 Tower_Calculations



Cooling Tower Calculations
	Parameter	Units	(Case #1)	(Case #2)	Metric Units	(Case #1)	(Case #2)
INPUT	Recirculation Rate (RR)	gpm	6,000	6,000	Recirculation Rate M^3/hr	6,000	6,000
	Delta T (dT)	Degrees F	10	10	Degrees C	10	10
	Concentration Ratio (CR)	cycles	4.0	4.0	cycles	4.0	4.5
	System Capacity	gallons	5,000	5,000	M^3	5,000	5,000
	Make-Up Calcium	ppm (CaCO3)	140	100	ppm (CaCO3)	100	100
	Make-Up Alkalinity	ppm (CaCO3)	150	100	ppm (CaCO3)	120	100
	Tower Target Alkalinity	ppm (CaCO3)	50	400	ppm (CaCO3)	400	400	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	51	51	M^3/hr	91	91	Evaporation = RR * dT * EC
	Blowdown Rate (BD)	gpm	17	17	M^3/hr	30	26	Blowdown Flow Rate = Evaporation / (CR-1)
	Blowdown Rate	MMLB/day	0.20	0.20	Tons (kg)/Day	729	624
	Make-Up Rate	gpm	68	68	M^3/hr	121	117	Make-Up Flow Rate = Evaporation + Blowdown
	Make-Up Rate	gpd	97,920	97,920	M^3/day	2,914	2,810
	Tower Calcium	ppm (CaCO3)	560	400	ppm (CaCO3)	400	450	Tower Calcium = Make-Up Calcium * CR
	Holding Time Index	hours	3	3	hours	114	133	HTI = 0.0116 * (Gallons Capacity/ gpm BD)             (metric) =0.693*System Capacity/BD Rate
	Acid Feed	#/day	112	0	kg/day	58	31	Acid Feed = (MU Alk.- (Target Alk./CR))*MU Flow
	Acid Feed	Gal/day	8	0	Liters/day	33	18