Description
Return dryVolume = wetVolume*(1-waterVaporFraction) and dryConcentration = wetConcentration/(1-waterVaporFraction).
Gas concentrations depend on moisture, oxygen and reference-state conventions. Removing water vapor changes the volume denominator; oxygen normalization uses a separate dilution convention. Both require compatible measurement bases.
Return dryVolume = wetVolume*(1-waterVaporFraction) and dryConcentration = wetConcentration/(1-waterVaporFraction).
When to use this tool
Use Stack Gas Dry Wet Volume Factor when checking one explicit gas-basis correction factor.
How to use the tool and how it works
- Enter wetVolume, waterVaporFraction, wetConcentration. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read dryVolume, dryConcentration. Use the output convention below.
Require nonnegative wetVolume and waterVaporFraction in [0,1). Return dryVolume = wetVolume*(1-waterVaporFraction) and dryConcentration = wetConcentration/(1-waterVaporFraction). The fraction is a volume or mole fraction on the same gas state, not percent.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| wetVolume | Wet Volume | Required. Finite number; minimum 0. |
| waterVaporFraction | Water-vapor volume/mole fraction on the common gas state, in [0,1). | Required. Finite number; minimum 0; strictly below 1. |
| wetConcentration | Wet Concentration | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| dryVolume | Dry Volume | Required. Finite number. |
| dryConcentration | Dry Concentration | Required. Finite number. |
{
"input": {
"wetVolume": 100,
"waterVaporFraction": 0.2,
"wetConcentration": 40
},
"output": {
"dryVolume": 80,
"dryConcentration": 50
}
}Limitations and assumptions
- The calculation removes water vapor from the volume basis while conserving the represented pollutant amount. wetConcentration is a signed finite input; temperature, pressure, oxygen correction and condensation behavior are not computed.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Establish the required wet/dry, temperature, pressure and oxygen references before combining correction factors or interpreting an emissions measurement.
References
Similar or alternative tools
- Environmental Engineering: Stack Gas Oxygen Reference Factor
Return result.correctionFactor = (airOxygenPercent-referenceOxygenPercent)/(airOxygenPercent-measuredOxygenPercent).
- Aeration Oxygen Transfer Supplied Factor Tool
Explicit alpha/beta oxygen-transfer correction with a supplied temperature factor and matching saturation reference.