Androcles wrote:
> "Steve" <no@[EMAIL PROTECTED]
> wrote in message
> news:wbqdnTZMuJIrizfanZ2dnUVZ_qiinZ2d@[EMAIL PROTECTED]
> | Evgenij Barsukov wrote:
> |
> | > Steve wrote:
> | >
> | >> 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.
> | >
> | >
> | > Sorry man, it might not be obvious, but this effect is true, easily
> | > provable based on the differential equation describing capacitor
> | > discharge and known to every electric engineer:
> | > http://www.smpstech.com/charge.htm
> |
> | But we're not talking about the first-year method of charging a
> | capacitor from an ideal voltage source through a resistor are we? Nor
> | are we talking about discharging through a resistor to a purely
> | resistive load, are we?
> |
> | >
> | > As other people have stated earlier, this applies only for straight
> | > linear capacitor / resistor systems without inductance.
> | >
> | > Switching systems with inductance is a different story and they can
> | > be 90-95% efficient.
> |
> | EXACTLY my point when I made the first rebuttal!! There is no
"theorem"
> | that states with any sort of generality that "no more than 1/2 the
> | energy stored in a capacitor can be recovered." In fact you can get
> | nearly 100% out as heat, should that be your goal (as it often is in
> | pulsed welding systems, for example). Period. End of story.
>
> At the EE correspondence school in outer Elbonia, if you drain
> a tank of water you can only put half the water back, easily
> provable based on the differential equation describing alcohol
> ingestion and known to every hydraulic engineer that is currently
> unemployed and wondering why he can't get a job even as a
> plumber's mate in inner Elbonia, let alone as a car mechanic's
> tea boy and general gofer in London.
>
> Might I suggest that Evgenij Barsukov is ineducable and suitable
> plonk material?
You want to measure credentials or salary?
>
>
|
