Commission Regulation (EU) No 601/2012 (repealed)Show full title

ANNEX VIII U.K. Measurement-based methodologies (Article 41)

1. Tier definitions for measurement-based methodologies U.K.

Measurement-based methodologies shall be approved in accordance with tiers with the following maximum permissible uncertainties for the annual average hourly emissions calculated in accordance with Equation 2 set out in section 3 of this Annex.

Table 1

Tiers for CEMS (maximum permissible uncertainty for each tier)

	Tier 1	Tier 2	Tier 3	Tier 4
CO2 emission sources	± 10 %	± 7,5 %	± 5 %	± 2,5 %
N2O emission sources	± 10 %	± 7,5 %	± 5 %	N.A.
CO2 transfer	± 10 %	± 7,5 %	± 5 %	± 2,5 %

2. Minimum requirements U.K.

Table 2

Minimum requirements for measurement-based methodologies

Greenhouse gas	Minimum tier level required
	Category A	Category B	Category C
CO2	2	2	3
N2O	2	2	3

3. Determination of GHGs using measurement-based methodologies U.K.

Equation 1: Calculation of Annual Emissions U.K.

Where:

GHG conc_hourly

=

hourly concentrations of emissions in g/Nm³ in the flue gas flow measured during operation;

Flue gas flow

=

flue gas flow in Nm³ for each hour.

Equation 2: Determination of average hourly concentrations U.K.

Where:

GHG emissions_{av hourly}

=

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

GHG conc_hourly

=

hourly concentrations of emissions in g/Nm³ in the flue gas flow measured during operation;

Flue gas flow

=

flue gas flow in Nm³ for each hour.

4. Calculation of the concentration using indirect concentration measurement U.K.

Equation 3: Calculation of the concentration U.K.

5. Substitution for missing concentration data for measurement-based methodologies U.K.

Equation 4: Substitution for missing data for measurement-based methodologies U.K.

Where:

=

the arithmetic mean of the concentration of the specific parameter over the whole reporting period or, where specific circumstances applied when data loss occurred, an appropriate period reflecting the specific circumstances;

σ _{C_}

=

the best estimate of the standard deviation of the concentration of the specific parameter over the whole reporting or, where specific circumstances applied when data loss occurred, an appropriate period reflecting the specific circumstances.