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Division B.2 Hourly N2O emissions

United Kingdom

Original text. Later amendments are not shown.

The operator shall calculate annual average hourly N2O emissions for each source where continuous emission measurement is applied using the following equation:

N 2 O emissions av hourly kg ∕ h = ∑ N 2 O conc hourly mg ∕ Nm 3 * flue gas flow Nm 3 ∕ h * 10 − 6 Hours of operation h

Where:

N2O emissionsav hourly

  • annual average hourly N2O emissions in kg/h from the source;

    • N2O conchourly

  • hourly concentrations of N2O in mg/Nm3 in the flue gas flow measured during operation;

    • Flue gas flow

  • flue gas flow determined in Nm3/h for each hourly concentration.

    • The operator shall determine hourly N2O concentrations [mg/Nm3] in the flue gas from each emission source using a measurement-based methodology at a representative point, after the NOx/N2O abatement equipment, where abatement is used. The operator shall apply techniques capable of measuring N2O concentrations of all emission sources during both abated and unabated conditions. Where uncertainties increase during such periods, the operator shall take them into account in the uncertainty assessment.

    The operator shall adjust all measurements to a dry gas basis where required and report them consistently.