How do you calculate emission factor?
Thus, the emission factor is the sum of emissions of CO2eq of the human activity described as mass unit of CO2eq / reference flows. For example: the EF for the natural gas is the sum of the combustion (0.205 kg CO2eq / kWh ICV) and the upstream (i.e. the production and transport of the gas) (0.0389 kg CO2eq / kWh ICV).
What does AP 42 stand for?
Compilation of Air Pollutant Emissions Factors
Compilation of Air Pollutant Emissions Factors (AP-42) AP-42, Compilation of Air Pollutant Emissions Factors, has been published since 1972 as the primary compilation of EPA’s emissions factor information. It contains emissions factors and process information for more than 200 air pollution source categories.
What is electricity emission factor?
The weighted average emission factor describes the average CO2 emitted per unit of electric- ity generated in the grid. It is calculated by dividing the absolute CO2 emissions of all power stations in the region by the region’s total net generation.
How are diesel engine emissions calculated?
Report actual emissions in tons/year. Calculate actual emissions using one of the following methods: If the emission factor is in units of pounds per quantity of fuel (gallons or cubic feet): Actual emissions (tpy) = Emission Factor (lb/unit) x Actual Annual Fuel Use (unit) x ([100 – Control Efficiency] ÷ 100)
How do you calculate carbon factor?
An emissions factor tells you how much CO2e is created per unit of activity. For example, taking the train emits 0.05945kg of CO2e per mile. Multiplying that by how many miles you travelled will give you the carbon footprint of that journey.
What is the carbon emissions factor?
16. An emission factor is defined as an average emission rate of a given GHG for a given source, relative to units of activity. 5 It is usually stated as GHG emission rate per unit of input or per unit of output.
What is the emission factor for diesel fuel?
2 Fuel-Specific Greenhouse Gas Emission Factors
| Fuel | Carbon emission factor (tC/TJ) | Carbon emission factor (tCO2/TJ) |
|---|---|---|
| Gas/diesel oil | 20.2 | 74 |
| Residual fuel oil | 21.1 | 77 |
| LPG (liquid petroleum gas) | 17.2 | 63 |
| Ethane | 16.8 | 62 |
What is emission factor rating?
The AP-42 emission factor rating is an overall assessment of how good a factor is, based on both the quality of the test(s) or information that is the source of the factor and on how well the factor represents the emission source.
How do you calculate carbon emission factor?
Carbon dioxide emissions per barrel of crude oil are determined by multiplying heat content times the carbon coefficient times the fraction oxidized times the ratio of the molecular weight of carbon dioxide to that of carbon (44/12).
What is default emission factor?
The ‘CoM Default Emission Factors’ collection consists of emission factors and coefficients provided to the Covenant of Mayors inititiave for the calculation of local Greenhouse Gas (GHG) emission inventories (in CO2 and CO2 equivalent), using standard (e.g. based on IPCC factors) or LCA (Life cycle assessment) …
How are the emissions factors in AP-42 compiled?
The emissions factors have been developed and compiled from source test data, material balance studies, and engineering estimates. The Fifth Edition of AP-42 was published in January 1995. Since then EPA has published supplements and updates to the fifteen chapters available in Volume I, Stationary Point and Area Sources.
What does ap42 stand for?
Compilation of Air Pollutant Emissions Factors (AP-42) AP-42, Compilation of Air Pollutant Emissions Factors, has been published since 1972 as the primary compilation of EPA’s emissions factor information. It contains emissions factors and process information for more than 200 air pollution source categories.
Where can I find more current mobile source emissions factors?
More current mobile source emissions factors are available using the Office of Transportation and Air Quality (OTAQ) mobile source models. Air Emission Inventories – “Volume 4 – Mobile Sources” provides a reference for collection of activity data needed as input to onroad and nonroad mobile models.
What is the second edition of the EPA AP 42?
1972 (PDF 8M) Revised, US EPA Second edition, AP 42, US EPA Compilation of Air Pollutant Emission Factors – Second edition, 1973 (PDF 11M) Compilation of Air Pollutant Emission Factors – Second edition, supplement 1, July 1973 (PDF 1.3M)
