Quote:
Originally Posted by blankall
You also have to take into account the fact that 20% of Earth's electricity comes from renewable sources (mostly Hydro) and another about 15% from nuclear. While these other sources aren't perfect either, they do produce a lot less carbon, which is the main worry for many right now.
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Jeez. You're making me do non-work related math that isn't simple numbers
Well, that leaves about 65% of the original energy being equal in carbon. If my mental math is right, that corrects to about 43% or greater efficiency in the changed processes (from combustion energy in plants to mechanical energy from the engine) in order to be as efficient. This could be problematic when many air compressors run inside single digit effectiveness (10-20% have been the ones I've worked with..I've heard of some 8-9% ones though). If that could be solved though, it would be approaching viability as a direct substitute.