Resources

Ozone Generator Calculations

Every calculation you need to monitor Ozone with your 2B Tech product.

Ozone Dosage Calculations

These calculations relate the ozone dosage to ozone generator output and water flow rate.

Calculate Ozone Generator Requirement

Find the ozone generator production rate (g/hr) required for achieving your desired ozone dosage into a water flow.

GPM PPM g/hr
ļš

0.227124 x GPM x PPM = g O3/hr

Detail showing all units:
3.7854 L/gal x 60 min/hr x TPM x PPM x 0.001 g O3/L-PPM = g O3/hr

GPM = your water flow rate in gallons/min
PPM = your desired ozone dosage in milligrams of ozone per kilogram of water (1 kg H2O = 1 L H2O)
g/hr = grams ozone per hour

Calculate Ozone Dosage from Generator Output & Water Flow Rate

This reverses the calculation above to find the ozone dosage achieved for a given water flow rate and generator output.

GPM

g/hr

PPM

ļš

g/hr x 4.40288 / GPM = PPM

Detail showing all units:
(g O3/hr x 1000 mg O3/g O3) / (GPM x 3.7854 L H2O /gal H2O x 60 min/hr x 1 kg H2O/L H2O) = PPM

GPM = your water flow rate in gallons/min

PPM = your desired ozone dosage in milligrams of ozone per kilogram of water (1 kg H2O = 1 L H2O)

Calculate Output of an Ozone Generator

Use these calculations to check the performance of your ozone generator.

From SLPM & wt% O3, for O2 Feed Gas

Determine the output of an ozone generator on oxygen feed gas (e.g., to check on the performance of your ozone generator).

O2 Flow Rate, SLPM wt% O3 O3 Output, g/hr
ļš

Directions: Enter the standard flow rate of oxygen and the concentration of ozone to determine the production of your ozone generator.

Note: This calculation only works with oxygen feed gas.

GPM = your water flow rate in gallons/min
PPM = your desired ozone dosage in milligrams of ozone per kilogram of water (1 kg H2O = 1 L H2O)

From SLPM & wt% O3, for Dry Air Feed Gas

Determine the output of an ozone generator on dry air feed-gas (e.g., to check on the performance of your ozone generator).

Air Flow Rate, SLPM wt% O3 O3 Output, g/hr
ļš

Directions: Enter the standard flow rate of the dry air and the concentration of ozone in this dry air to determine the production of your ozone generator.

Note: This calculation only works with dry air feed-gas.

SLPM x wt% air x 0.77598 = g O3/hr

Detail showing all units:
std L/min air x 60 min/hr x 1 mol air/L air x 28.97 g air/mol air x (wt% air / 100) = g O3/hr

Note: SLPM = your standard air flow rate in liters air/min

From LPM & g/m3 O3, for any Feed Gas

Determine the output of an ozone generator when you know the flow rate and ozone concentration in grams of ozone per m3 of air/oxygen. This calculation is independent of whether the feed-gas being used is dry air or oxygen.

Flow Rate, LPM g/m3 O3 O3 Output, g/hr
ļš

LPM x g/m3 O3 x 0.06 = g O3/hr

Detail showing all units:
L/min O3 x 60 min/hr x g O3/m3 feed-gas x 0.001 m3/L = g O3/hr

LPM = the volumentric flow rate of the feed-gas in units of liters per minute;
g O3/m3 = the O3 concentration in units of g O3 per m3 of feed-gas

From SCFM & PPM O3, for any Feed Gas

Determine the output of a commercial ozone generator (e.g. Determine the amount of ozone necessary to treat a flue gas stream or for many other industrial emission control applications.).

Flow Rate, SCFM PPM O3 by Volume O3 Output, mg/hr
ļš

Note: If you do not know the feed-gas flow rate, it can be measured with a wind speed meter and corrected for standard conditions. Using the feed-gas flow rate in SCFM and the ozone level in PPM, the output of the ozone generator output in milligrams/hour can be determined.

SCFM x PPM x 3.6407 = mg O3/hr

Detail showing all units:
std ft3/min x 60 min/hr x 1728 in3/ft3 x 16.387 cm3/in3 x PPM x 10-6/PPM x 1 mol O3/22,400 cm3 x 48 g O3/mol O3 x 1000 mg O3/g O3

SCFM = feed-gas flow rate in standard cubic feet/min;
PPM = the O3 concentration in parts-per-million by volume (cm3 O3 per 1,000,000 cm3 feed-gas)

Ozone Production Rates

Units Conversions

Convert your ozone generator output rate or your flow rate into different units.

Ozone Generator Output Rate Conversions

Type a value in any of the fields to convert the ozone generator output rate into other units:


lb/day
g/hr
mg/hr
kg/hr

Flow Rate Conversions

Type a value in any of the fields to convert flow rates into other units:

CFH
CFM
LPM
GPM
m3/hr

Pressure Related Calculations

Pressure Correction for a Rotameter

Enter the pressure in PSIG (gauge pressure) and your measured flow rate in any units. The calculator gives the corrected flow rate in the same units.

Measured Flow Rate Pressure (PSIG) Corrected Flow Rate
ļš

Measured Flow x [(PSIG + 14.7)/14.7]1/2 = Corrected Flow
Measured Flow x (PSIA/14.7)1/2 = Corrected Flow

PSIG = PSIA – 14.7
PSIA = pounds per square inch absolute
PSIG = pounds per square inch gauge

Pressure Unit Conversions

Type a value in any of the fields to convert pressures into other units:


PSIA
PSIG
atmosphere
bar
kilopascal
foot head (of water at 4 oC)
torr (mm Hg)

Ozone Calculations

Relevant Physical Properties

Density of ozone = 2.14 kg/m3

Molecular weight of ozone = 48

Density of oxygen = 1.43 kg/m3

Molecular weight of oxygen = 32

Density of air = 1.29 kg/m3

Average molecular weight of dry air = 28.97

Density of water = 1,000 kg/m3 = 1 g/cm3 = 1 kg/L

Volume of 1 mole of gas at STP = 22.4 liters

Standard temperature and pressure (STP) = 0oC and 1 atmosphere

Note: A newer definition of STP conditions (not yet adopted by all organizations) is 0oC and 1 bar where 1 bar = 0.986923 atm