John Bailey wrote:
> Is that a fact and reason based answer or just a guess? A battery is
> not as efficient as a capacitor and there is a theorem from sophomore
> EE that "proves" no more than 1/2 the energy stored in a capacitor can
> be recovered.
Maybe at some EE correspondence school in outer Elbonia, but not
anywhere creditable. Most capacitors are nearly 100% efficient at low
frequency and moderate charge/discharge rates, I have no idea where you
came up with some "proof" that no more than half can be recovered. Even
in very stressing conditions, such as advanced dielectric capacitors
under high discharge rates (pulsed power systems, for example) you can
get well over 90% of the energy back out of a capacitor. If you're
losing energy in a capacitor, then the capacitor was poorly selected for
the application- such as using an electrolytic cap at radio frequencies
or higher.
Batteries are indeed a different story, though. I agree that current
hybrids are probably achieving well below 50%.
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