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Emission Stack Flow Concentration Term

Multiply supplied stack volume flow by concentration on the same reference temperature, pressure and moisture basis.

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Description

Calculate supplied analyte mass flow from stack volume flow and mass concentration.

Gas and aerosol records need explicit species, charge, reference state, concentration and wet/dry bases. A pressure correction to mass concentration differs from a change in mole fraction, and absolute uncertainty differs from a relative percentage. Blank-corrected negative values can expose discrepancies without proving physical concentrations.

Calculate supplied analyte mass flow from stack volume flow and mass concentration.

When to use this tool

Use Emission Stack Flow Concentration Term when you already have stackVolumeFlow, analyteMassPerVolume and need to calculate supplied analyte mass flow from stack volume flow and mass concentration.

How to use the tool and how it works

  1. Enter stackVolumeFlow, analyteMassPerVolume. Use the units and conventions below.
  2. Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
  3. Read analyteMassFlow. Use the output convention below.

Require both nonnegative; multiply stackVolumeFlow*analyteMassPerVolume.1

Input fieldMeaning and unitsAccepted input
stackVolumeFlowStack Volume FlowRequired. Finite number; minimum 0.
analyteMassPerVolumeAnalyte Mass Per VolumeRequired. Finite number; minimum 0.
Output fieldInterpretationReturned shape
analyteMassFlowAnalyte Mass FlowRequired. Finite number.
json
{
  "input": {
    "stackVolumeFlow": 20,
    "analyteMassPerVolume": 0.5
  },
  "output": {
    "analyteMassFlow": 10
  }
}

Limitations and assumptions

  • Volume conditions, wet/dry basis and time unit must agree. This local product does not perform emissions sampling, standard-state corrections or a compliance assessment.
  • 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

Review the complete sampling, calibration and chemical analysis with verified reference conditions. Check dilution, background, charge and uncertainty definitions before using local terms in an emissions, composition or compliance assessment.

References

  1. Calculation and input contract: atmospheric-chemistry/emission-stack-flow-concentration-term — tool.io

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