In order to calculate CO2 emissions using fuel type, fuel consumption and emission factor
data, the following equations can be applied:
Emission (CO2) = ∑ Amount of Fuel Consumed x Emission Factor of CO2
where
Emission, in terms of tonnes of CO2 -equivalent, is summed over all types of fuel used;
Amount of fuel consumed is in terms of volume (e.g. litre) or mass (e.g. kg) for particular
fuel; and
Emission Factor of CO2 = Net Calorific Value of the Fuel x Carbon Factor of Fuel x Fraction
of Carbon Oxidised x (44 / 12)
To calculate CH4 and N2O emissions, the equation below can be applied:
Emission (CH4 / N2O) = ∑ Amount of Fuel Consumed x Emission Factor of (CH4 / N2O)
x Relative GWP
where
Emission, in terms of tonnes of CO2-equivalent, is summed over all types of fuel used;
Amount of fuel consumed is in terms of volume (e.g. litre) or mass (e.g. kg) for particular
fuel;
Emission Factor of (CH4 / N2O) = Net Calorific Value of the Fuel x Specific (CH4 / N2O)
Conversion Factor; and
Relative GWP = Relative Global Warming Potential (GWP) of CH4 / N2O
