I reckon I've seen a single open cut coal mine that's probably 10% of that size... Leigh Creek in SA. Actually, I just looked it up on GoogleMaps. It's "only" about 8km x 3km or so, or 2.5%. I still wonder how much electricity we could generate if we covered every coal mine in Australia with solar panels?
Carmichael coal mine is planned to be 447 square km [0], over half being "surface disturbance area"
Insolation at that location is about 2.1MWh per square metre per year, or 2100GWh per square km per year. [1]
Solar panels are around 20% efficiency, so lets call it 15% to include things like support areas.
The area used by that coal mine could generate 2100 x .15 x 447 = 140TWh per year
Austrailia currently uses 190TWh/year [2], so an area the size of that one mine could generate the majority of Austrailia's electrical requirements.
That's just back of envelope numbers, if we look at existing solar plants though, Solar Star in California generates [3] 526MWh/acre, or 130GWh/sqkm -- so this plant would generate 58TWh a year, still over 25% of requirements
There are many problems with solar power, but space use in Australia is not one.
bigiain|6 years ago
isostatic|6 years ago
Insolation at that location is about 2.1MWh per square metre per year, or 2100GWh per square km per year. [1]
Solar panels are around 20% efficiency, so lets call it 15% to include things like support areas.
The area used by that coal mine could generate 2100 x .15 x 447 = 140TWh per year
Austrailia currently uses 190TWh/year [2], so an area the size of that one mine could generate the majority of Austrailia's electrical requirements.
That's just back of envelope numbers, if we look at existing solar plants though, Solar Star in California generates [3] 526MWh/acre, or 130GWh/sqkm -- so this plant would generate 58TWh a year, still over 25% of requirements
There are many problems with solar power, but space use in Australia is not one.
[0] https://en.wikipedia.org/wiki/Carmichael_coal_mine
[1] https://en.wikipedia.org/wiki/Solar_power_in_Australia#/medi...
[2] https://www.aer.gov.au/wholesale-markets/wholesale-statistic...
[3] https://en.wikipedia.org/wiki/Solar_Star