This weekend just gone I went through some old magazines I have. One was an old G (green living) Magazine from September 2008.
There is a small blurb that states:
The sale of incandescent bulbs will be banned in Australia by the end of 2010. This will reduce our electricity use by 4 terrawatts per year - that's as much electricity as a small coal-fired power station produces.
-Originally sourced from the Federal Department of the Environment
4 terrawatts = 4,000,000,000,000 watts
There are 24 hours in a day and 365 days in an regular year, multiply these together and you have a total of 8760 hours in one year.
To determine the cited savings in the standard unit of kilowatt hour, we first have to turn those watts into kilowatts by dividing by 1,000
So 4,000,000,000 kilowatts - Now we average this use across all the hours of one year (8760 hours).
4,000,000,000 / 8760 = 456,621 kWh (456.6 Megawatt Hours)
...So by just switching light bulbs Australia collectively saves 456.6mWh every hour for an entire year?!?
This seems impressive, divided over 22million residents of Australia it comes out at about a 0.5 kilowatt hour saving...@ 20c per kilowatt hour, Australians are supposedly saving 10c an hour because of this switch - But was the 4 terrawatt figure for savings given in 2008 accurate? I'm not sure :P
What I do know is that if one business provided the whole of Australia with electricity and this happened that it would represent (at a rate of 20c per kWh) a loss of income of $91,324.20 every hour, or $2,191,780.80 per day...a whopping $799,999,992 per year. And people wonder why electricity prices keep rising...
According to wiki.answers.com
"...950 grams of CO2 is evolved for every KWh of electricity produced"
Making the assumption that all of those 4 terrawatts were sourced from coal fired power plants, this would represent a saving in C02 emissions of 433,790 Kg...every hour, for a year.
Considering Australia is preventing nearly half a megaton of CO2 every hour, why is the Labor Government of Australia introducing a carbon tax?