Emissions calculations #41
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How are emissions calculated for various locations inside and outside of the US? |
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Emissions of CO2 are estimated from both utility electricity and on-site fuel consumption for the existing boiler, CHP and/or backup diesel generator. Fuel emission factors default to the value appropriate for the fuel type. For grid emissions, if the site location is within the continental United States, the hourly default factors used will be for the US EPA AVERT region corresponding to the location (EPA 2019). If the site is in Hawaii or Alaska, a default annual emission factor used in the evaluation comes from the EPA eGRID database of annual average emission factors. If the site location is outside the United States, any of the CO2 emission factor input options can be used. However, if no emission factor selection is made, there is no default value and the CO2 emissions from the electricity grid will not be calculated. More detail is available in the REopt User Manual. |
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Emissions of CO2 are estimated from both utility electricity and on-site fuel consumption for the existing boiler, CHP and/or backup diesel generator. Fuel emission factors default to the value appropriate for the fuel type.
For grid emissions, if the site location is within the continental United States, the hourly default factors used will be for the US EPA AVERT region corresponding to the location (EPA 2019). If the site is in Hawaii or Alaska, a default annual emission factor used in the evaluation comes from the EPA eGRID database of annual average emission factors.
If the site location is outside the United States, any of the CO2 emission factor input options can be used. However, …