Transcription of Hydro-Québec's electricity facts : CO2 Emissions and Hydro ...
1 Hydro -Qu bec meets the energy needs of its customers almost entirely with hydroelectricity. The utility also purchases electricity from independent producers in Qu bec, elsewhere in Canada and the United States. These purchases include renewable energies (hydroelectricity, bioenergy and wind energy) as well as non-renewal energies (nuclear and thermal energy). To calculate CO2 Emissions (kg/MWh) from all these sources of supply, Hydro -Qu bec uses the following emission factors: A zero emission factor for renewable and nuclear energy A specific factor for each thermal generating station and each supplier This method excludes Emissions from off-grid systems, which consist mainly of thermal plants.
2 These off-grid systems supply communities that are too remote to be connected to our main grid. The fluctuations in emission rate over the years are due to variations in our sources of supply. The highest emission rates are for years when production at our Tracy thermal generating station and our purchases from independent producers using fossil fuels were greatest. The Tracy plant stopped generating electricity in 2011. Hydro -QU BEC S electricity facts : CO2 Emissions and Hydro -Qu bec electricity , * Excluding off-grid systems For more information, consult the data sheet entitled Energy Supplies and Air Emissions for the twelve-month period ended December 31, 2016.
3 YEARCO2 Emissions * (kg/MWh)
