Methods for Measurement

Method 1 – default values for emissions factors (EF) and energy content (EC) are applied to quantities of fuel

E_ij = (Q_i x EC_i x EF_ijoxec) / 100

where:

E_ij is the emissions of gas type (j), (carbon dioxide, methane or nitrous oxide), from fuel type (i) (CO₂-e tonnes).

Q_i is the quantity of fuel type (i) (tonnes).

EC_i is the energy content factor of the fuel (gigajoules per tonne) according to each fuel.

If Q_i is measured in gigajoules, then EC_i is 1.

EF_ijoxec is the emission factor for each gas type (j) (which includes the effect of an oxidation factor) for fuel type (i) (kilograms of CO₂-e per gigajoule) according to each fuel.

Method 2 – same as 1 however EC & EF use test results from sampled fuel sources, tested in accordance with approved standards / laboratory method

Method 3 – same as 2 but with sampling also completed in accordance with approved standards

Method 4 – Constant emissions monitoring ( CEM) or Periodic Emissions
Measurement (PEM)

Criteria for measuring fuel consumed

1. Criterion A – Invoices
2. Criterion AA – Invoices corrected for stockpile adjustments
3. Criterion AAA – Direct Measurement at Point of Combustion
4. Criterion BBB – Measured in Accordance to Industry Standard
5. Incidental Reporting

Emission calculations

CO₂eq_(fuel) = Q_(fuel) x [ [ ECF_(fuel)] x ([EF_CO2] + [EF_CH4] + [EF_N2O] ) ] /1000

CO₂eq – Carbon dioxide (equivalent) emissions (tonnes CO2e)

Q_(fuel) – Amount of Fuel (use units to match units of ECF)

ECF_(fuel) – Energy Content Factor for relevant fuel (from Schedule 1, MD)

EF_CO2 – Emission Factor for CO2 for relevant fuel (from Schedule 1, MD)

EF_CH4 – Emission Factor for CH4 for relevant fuel (from Schedule 1, MD)

EF_N2O – Emission Factor for N2Ofor relevant fuel (from Schedule 1, MD)

Schedule 1

Measurement Determination

Fuel Factors

Example Calculation

Calculate the CO₂ equivalent emissions from the combustion of
250,000L of LPG

CO₂eq_(fuel) = Q_(fuel) x [ [ ECF_(fuel)] x ([EF_CO2] + [EF_CH4] + [EF_N2O] ) ] /1000.

Calculate the CO₂ equivalent emissions from the combustion of
980,000 GJ of Natural Gas

CO₂eq_(fuel) = Q_(fuel) x [ [ ECF_(fuel)] x ([EF_CO2] + [EF_CH4] + [EF_N2O] ) ] /1000.