30 Dec '12, 2pm

Energy Part II: EROEI | Peak Oil News and Message Boards

Energy Part II: EROEI | Peak Oil News and Message Boards

But I digress, the main thing to take home is no form of energy extraction, be it from coal, nuclear fission (fusion for the optimists) and wind or solar actually generates energy. It just utilises existing energy sources. In the above examples energy is extracted either through nuclear fission/fusion reactions, potential chemical energy in coal/oil/gas or wind and solar energy. Another concept that will come from this basic idea and one that perhaps even more relevant is that it takes energy to get energy. This concept while important is something that rarely (if ever) gets discussed in the mainstream media. Much of the talk about oil, coal or gas “production” only refers to the amount of total energy that can be obtained from burning or utilising a given resource. This amount is merely the gross energy obtained from the ground. If we wish to determine the amount of usefu...

Full article: http://peakoil.com/generalideas/energy-part-ii-eroei/

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