26 May '11, 1pm

Volvo Car Corporation developing flywheel kinetic energy recovery system; considering broad application

In recovering energy during braking, mechanical systems have much higher efficiency than electrical systems. No energy conversion is needed. You go from kinetic energy in the car to – kinetic energy in the flywheel. Provided that an (efficient) infinitely variable mechanical transmission could be practically realized, nothing on earth can be more efficient. This is of course nothing new. An undergraduate student could make a simple calculation in a couple of minutes to show this. Still it is surprising to find that the faith in electric drive system is so great (religion?) that this fact is simply not accepted. Does the poor efficiency of an electric drive system mean that it has greater development potential than a mechanical system? Probably, in relative terms and presumably, the gap could also be reduced but in the end, the efficiency will still be lower than for a well...

Full article: http://www.greencarcongress.com/2011/05/vcc-20110526.html

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