This section describes how to calculate official emission results for CO2, CH4, and N2O.
Where:
eCO2 = the calculated CO2 emission result.
Emfuelmeas = the mass-specific net energy content of the test fuel as determined in paragraph (b)(1) of this section. Note that dividing this value by wCmeas (as is done in this equation) equates to a carbon-specific net energy content having the same units as EmfuelCref.
EmfuelCref = the reference value of carbon-mass-specific net energy content for the appropriate fuel type, as determined in Table 1 in this section.
wCmeas = carbon mass fraction of the test fuel (or mixture of test fuels) as determined in paragraph (b)(2) of this section.
Example:
eCO2 = 630.0 g/hp·hr
Emfuelmeas = 42.528 MJ/kg
EmfuelCref = 49.3112 MJ/kgC
wCmeas = 0.870 kgC/kg
eCO2cor = 624.5 g/hp·hr
Table 1 to Paragraph (b)(4) of § 1036.550 -Reference Fuel Properties
Fuel typea | Reference fuel carbon-mass-specific net energy content, EmfuelCref (MJ/kgC)b | Reference fuel carbon mass fraction, wCrefb |
Diesel fuel | 49.3112 | 0.874 |
Gasoline | 50.4742 | 0.846 |
Natural gas | 66.2910 | 0.750 |
LPG | 56.5218 | 0.820 |
Dimethyl ether | 55.3886 | 0.521 |
High-level ethanol-gasoline blends | 50.3211 | 0.576 |
a For fuels that are not listed, you must ask us to approve reference fuel properties.
b For multi-fuel streams, such as natural gas with diesel fuel pilot injection, use good engineering judgment to determine blended values for EmfuelCref and wCref using the values in this table.
40 C.F.R. §1036.550