Carbon Footprint of Electricity


CO2e: 0.1Kg per MegaJoule (1.5 hours)


The amount of CO2 produced in generating electicity is largely dependent on the primary source. The estimates are given by country and vary significantly but these are reasonable estimates base on the figures given:

CO2 produced in generating electricity from Gas 100 gm of CO2 per MegaJoule
CO2 produced in generating electricity from Coal 247 gm of CO2 per MegaJoule *
CO2 produced in generating electricity from Oil 157 gm of CO2 per MegaJoule
CO2 produced in generating electricity from AlFuels 96 gm of CO2 per MegaJoule

These are indicative figures based on a speadsheet from the International Energy Agency.

**Household energy consumption is say 18000 Megajoules per year producing 1800 Kgs CO2. This is about 5 Kgs per day.

* Thermal coal stations are 30-40% efficient (electricity output/heat input)
So (approximately) The CO2 produced by a megajoule of heat energy from coal is about 70 gms (247*100/33) Coal is 80% + of carbon.

**from http://www.esru.strath.ac.uk/EandE/Web_sites/01-02/RE_info/hec.htm
Considering that there are many differing types/sizes of house in Scotland it is clear that all will use varying amounts of electricity depending on there own unique situation.

Listed below are some examples of the varying levels of electricity consumption from household to household.

1. Working Couple – 4,117 kWh electricity
2. Single Person – 3,084 kWh electricity
3. Family with two children – 5,480 kWh electricity
(Parents working, children at school)

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