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HOMER Pro 3.13

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Grid Emissions

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The Emissions tab allows you to specify emissions factors for several pollutants.

Variable

Description

Carbon Dioxide

The amount of carbon dioxide released per kWh of grid power consumed by the system, in grams/kWh

Carbon Monoxide

The amount of carbon monoxide released per kWh of grid power consumed by the system, in grams/kWh

Unburned Hydrocarbons

The amount of unburned hydrocarbons released per kWh of grid power consumed by the system, in grams/kWh

Particulate Matter

The amount of particulate matter released per kWh of grid power consumed by the system, in grams/kWh

Sulfur Dioxide

The amount of sulfur dioxide released per kWh of grid power consumed by the system, in grams/kWh

Nitrogen Oxides

The amount of nitrogen oxides released per kWh of grid power consumed by the system, in grams/kWh

HOMER uses these emissions factors to calculate:

The emissions of each pollutant resulting from grid power purchases.

The avoided emissions of each pollutant resulting from grid power sales.

The values of these coefficients depend on the generation mix of the electricity in your area. In an area where the majority of the electricity is produced from coal, these values are relatively high because burning coal results in large emissions of pollutants. Natural gas generation results in somewhat lower emissions, and nuclear and hydro generation result in virtually no emissions of these pollutants.

See the table of US grid emissions factors section in the help for more information. For additional resources, see the Finding data to run HOMER section.

See also

How HOMER Calculates Emissions