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Hi Joacim and All,
--- Joacim Persson <joacim@ymex.net> wrote:
> On Mon, 14 Jan 2002, Arnt Karlsen wrote:
>
> ...
> > ..at 25-35% efficiency, the gasoline and diesel
> engines _are_ obsolete.
While these can develop this kind of eff in
steady state running in a car the eff is more like 7%
of the fuel's energy actually drives the rear wheels.
A good EV can get up to 20% eff from the power
plant fuel to the road.
>
> Ehum. Not comparable. A flywheel is a storage of
> (close to?) 100% pure work.
> Ottos and diesels are heat motors. Heat is never
> 100% work, you know. ;)
But where does the flywheels energy come from?
What eff was it made at? While flywheels sound good
they have many problems in a car.
>
> Beats a chemical battery though?
Not in eff or cost. A lead/acid battery can charge
elect in /elect out at 95/ 97% eff and with a rundown
of 4 months while the flywheel will lose all it's
energy in 2 or 3 days and would be lucky to get 92%
eff not counting where the electricity comes from to
charge both.
jerry dycus
> Joacim
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