Diesel fuel generator – fuel usage

Download the diesel fueled generator calculator to help you estimate the releases of National Pollutant Release Inventory (NPRI) substances.

Diesel-powered reciprocating engine generators (up to 600 horsepower) release Part 1, 2, 4 and 5 substances. This release calculator uses default emission factors and can be adapted to use site-specific emission factors. If you want to use a site-specific emission factor, enter it in the emission factor column, but be sure to convert the units correctly. 

The spreadsheet calculators use emission factors based on uncontrolled emission sources. If you use an emission control device and the default emission factor is uncontrolled, use this formula to adjust the spreadsheet calculation:

Controlled emissions = uncontrolled emission x ((100 - control efficiency)/100)

Since NPRI reporting thresholds are for the facility as a whole, you may need to combine the air releases you calculate with releases from other sources at your facility.

The following sections explain how the spreadsheet calculator works.

Suggested estimation methodology: emission factor

The general equation for estimation using an emission factor is:

E = A x EF

where:

  • E = emissions
  • A = activity rate
  • EF = emission factor

Input data

A = amount of diesel burned [cubic meters (m3) or Liters (L)]
B = heating value of diesel fuel [Giga Joules (GJ)/m3]*

If you know the amount of diesel in liters, use this formula to convert it to cubic meters:

A[m3] = A[L]/1000

Use the factors from the tables below to calculate the emissions for each substance.

Substance releases

Part 1 releases
Substance Chemical Abstracts Service registry number (CAS RN)1 Part Emission factor (EF)2 EF units
Acetaldehyde 75-07-0 1A 1.259E-02 kg/m3
Acrolein 107-08-8 1A 7.593E-04 kg/m3
Anthracene 120-12-7 1A 3.070E-05 kg/m3
Benzene 71-43-2 1A 1.532E-02 kg/m3
1,3-butadiene 106-99-0 1A 3.209E-04 kg/m3
Formaldehyde 50-00-0 1A 1.937E-02 kg/m3
Naphthalene 91-20-3 1A 1.392E-03 kg/m3
Propylene 115-07-1 1A 4.235E-02 kg/m3
Toluene 108-88-3 1A 6.714E-03 kg/m3
Isomers of xylene 1330-20-7 1A 4.679E-03 kg/m3
Mercury 7439-97-6 1B 4.948E-06 kg/m3
Part 2 releases
Substance Chemical Abstracts Service registry number (CAS RN)1 Emission factor (EF)2 EF units
Acenaphthene 83-32-9 1.166E-05 kg/m3
Acenaphthylene 208-96-8 4.153E-05 kg/m3
Benzo (a) anthracene 56-55-3 2.758E-05 kg/m3
Benzo (a) phenanthrene 218-01-9 5.795E-06 kg/m3
Benzo (a) pyrene 50-32-8 1.543E-06 kg/m3
Benzo (b) fluoranthene 205-99-2 8.134E-07 kg/m3
Benzo (g,h,i) perylene 191-24-2 4.014E-06 kg/m3
Benzo (k) fluoranthene 207-08-9 1.272E-06 kg/m3
Dibenzo (a,h) anthracene 53-70-3 4.785E-06 kg/m3
Fluoranthene 206-44-0 1.249E-04 kg/m3
Fluorene 86-73-7 4.794E-04 kg/m3
Indeno(1,2,3-c,d) pyrene 193-39-5 3.078E-06 kg/m3
Phenanthrene 85-01-8 4.826E-04 kg/m3
Pyrene 129-00-0 7.847E-05 kg/m3
Part 4 criteria air contaminants (CAC) releases
Substance Chemical Abstracts Service registry number (CAS RN)1 Emission factor (EF)(2)(**) EF units
Carbon monoxide (CO) 630-08-0 0.4084 x B kg/m3
Sulphur dioxide (SO2) 7446-09-5 0.1247 x B kg/m3
Oxides of nitrogen (NOx), expressed as nitrogen dioxide (NO2) 11104-93-1 1.8960 x B kg/m3
Volatile organic compounds (VOCs) *** 0.1548 x B kg/m3
Total particulate matter (TPM) *** 0.1333 x B kg/m3
Particulate matter less than or equal to 10 micrometers (µm) (PM10) *** 0.1333 x B kg/m3
Particulate matter less than or equal to 2.5 µm (PM2.5) *** 0.1333 x B kg/m3
Part 5 releases
Substance Chemical Abstracts Service registry number (CAS RN)1 Emission factor (EF)(2)(**) EF units
Benzene 71-43-2 4.011E-04 x B kg/m3
1,3-butadiene 106-99-0 8.405E-06 x B kg/m3
Formaldehyde 50-00-0 5.073E-04 x B kg/m3
Propylene 115-07-1 1.109E-03 x B kg/m3
Toluene 108-88-3 1.758E-04 x B kg/m3
Isomers of xylene 1330-20-7 1.225E-04 x B kg/m3
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