Metric (International)
Cooling Calculations (Metric)
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Boiler Calculations (Metric)
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Softener Calculations (Metric)
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Dealkalizer Calculations (Metric)
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LSI/Ryznar Calculations (Metric)
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Wastewater Calculations (Metric)
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AWT Calculations Help
Information: Cooling (Metric)
- Formulas
Tower kW:
RR / 3.22L/m RR:
Tower kW × 3.22VOLUME:
1.5 × sump or
5 × RR or
Evap C = RR × 1.83CYCLES (COC):
Tower TDS / MU TDSEVAP (E) LPM:
E = 1% × RR per 10 FMake up (MU) LPM:
(Evap × COC) / (COC - 1)Blow Down (BD) LPM:
E / (COC - 1)Holding Time Index (HTI) Hrs:
0.693(V/BD)CR = 3.22 LPM / KW
E = 1 LPM / 31 KW
- Inhibitor lbs/day
( (ppm / 120) × ( (BD(LPM) / 3.785 ) x 1440) / 1000 ) / 2.204 = kg/day
- Biocide Dosing
slug:
( (ppm / 120) × (Volume Liters / 3.785) / 1000 ) / 2.204 = kg/day- Links
Basic Calculations Necessary to Survive in the Field - Part I: Cooling Water
Guidelines for Treatment of Systems Containing Enhanced and Super Enhanced Tubes
Information: Boiler (Metric)
- Formulas
Boiler Horsepower × 34.5 = # steam / hr
- Inhibitor lbs/day
CYCLES (COC):
Boiler TDS / FW TDS((ppm / COC) / 120) × (MU gpm × 1440 / 1000)
or
(ppm / 120) × (BD(gpm) x 1440) / 1000- Abbreviations
BD: Blow Down
BW: Boiler Water
COC:Cycles of Concentration; Cycles
FW: Feed Water
MU: Make Up
Mmhos: millimhos
ppm: parts-per-million
- End Units
Annual AVG Steam Load:
#/hrCycles of Concentration:
cyclesHours/Day:
hoursDays/Year:
daysCity Water Cost:
$/m3MU Conductivity:
MmhosFW Conductivity:
MmhosCondensate Conductivity:
MmhosOperating Hours:
min/yrMU Water Flow:
L/mFW Flow:
L/mBD Rate:
L/mAnnual MU:
galAnnual BD:
galActual % Condensate Return:
%MM pounds per year:
MM lbsCondensate Flow Rate:
L/mSteam Flow:
L/mAnnual Water Costs:
$/yr- Links
Basic Calculations Necessary to Survive in the Field - Part III: Boiler Water
Information: Softener (Metric)
Exchange Capacity:
1060 mg/L @ 33 Kg saltPeak Flow Rate:
0.67 lpm per Liter of Resin1 ft3 = 28.3206 Liters
- Links
Basic Calculations Necessary to Survive in the Field - Part 2: Pretreatment
Information: Dealkalizer (Metric)
Peak Flow Rate:
0.40 lpm per LiterExchange Capacity:
353 mg/L @ 11Kg SaltExchange Capacity:
459 mg/L @ 11Kg Salt w/NaOH.55 Kg NaOH
Other Anions
-
1ppm PO42-
1.58 ppm as CaCO3
1ppm SO42-
1.04 ppm as CaCO3
1ppm SiO2
0.83 ppm as CaCO3
1ppm NO3
0.81 ppm as CaCO3
1ppm Cl-
1.41 ppm as CaCO3
- Links
Basic Calculations Necessary to Survive in the Field - Part 1: Cooling Water
Information: LSI/Ryznar (Metric)
A tolerance of -0.3 to +0.3 is the ideal range for swimming pools
A tolerance of -0.5 to +0.5 is acceptable for swimming pools
A Saturation Index of higher than +0.5 indicates carbonate scale formation.
A Saturation Index of lower than -0.5 indicates corrosive water.
Information: Wastewater (Metric)
- Formulas
Dosage Required = (Volume of Water to be treated x PPM)/1,000,000
Pound Required = (Target ppm/120) x (Volume Water/1000)
Feed Factor = 100/Percent Solution (as percent)
Percent Solution = 100 X (Volume of Polymer/Total Solution Volume) (*Volumes must be in same units)
Percent Removal = ((influent - Effluent)/ Influent) x 100
This is used to calculate the removal efficiency for BOD, TOC, COD, TSS, FOG, etc
Floculant Make down
Day Tank addition Calculation
Floculant Volume Added = (Desired Flocculent Make Down Percent/100) x Day Tank Volume x unit desired conversion
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