There has been much analysis about the cost of various technologies used to supply energy. This note will try and list some of the articles that I have come across.
http://www.theoildrum.com/node/1863
This is a link to one of Jeremy Wakeford's column:
http://www.engineeringnews.co.za/article/energy-return-on-energy-invested-2012-06-15
And this is a comment from one of Terry Mackenzie-Hoy's columns:
A big wind turbine (Vesta 152) weighs 267 t, so, if it is all steel (which it is not), it must produce at least 4 200 000 000 000 kJ over its life time. If it is a 2 500 kW turbine, then, over 2 000 windy hours in a year, it will produce 180 000 000 000 kJ. Thus, many years will pass before it actually produces more power than it generates. And, on a production basis, a wind turbine has negative energy consumption. So, why, oh, why, are these projects going ahead? Or even being contemplated? ( http://www.engineeringnews.co.za/article/the-csir-blunders-on-2012-02-03 )
Terry Mackenzie-Hoy replied to my query in a July 2012 article:
http://www.engineeringnews.co.za/article/energy-return-on-energy-invested-2012-07-13
Terry was quite scathing about wind energy in an earlier article in April to the extent that his tongue nearly got stuck in his cheek:
http://www.engineeringnews.co.za/article/wind-farms-may-well-be-another-bubble-that-is-doomed-to-burst-2012-04-06
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