Mark wrote:
On Sep 17, 2:04Â*pm, wrote:
Mark wrote:
On Sep 17, 12:30Â*pm, wrote:
Edward A. Falk wrote:
In article ,
wrote:
Mark wrote:
In the year 2055, you will be arrested and prosecuted
for operating an internal combustion engine in the
United States of America. (Chimerica)
Then everyone starves when the big rig trucks stop food distribution.
Presumably, by then electric vehicles will be practical. Â*I think that's
OP's original point.
And a good point it is -- if we achieve a) cheap, clean electricity
(e.g. fusion, solar) and b) practical batteries, then we'll see incredible
changes in air quality, the economy, and even world politics.
I would guess that the use of internal combusion engines will not actually
be outlawed. Â*More likely, people who want to operate them (e.g. antiques
collectors) will simply pay a pollution tax when they buy the fuel.
Bear in mind that if 99% of the vehicles switch to electric, then the
few ICEs that remain won't be generating enough pollution to actually
worry about. Â*We might even see a relaxation of pollution laws rather
than a tightening of them.
I'm not holding my breath though. Â*Batteries suck and they're not getting
much better. Â*It will be exciting to see what the next 50 years brings.
Batteries have been around for 210 years and there is nothing on horizon
that will provide anywhere near the energy density required to power
something like a big rig truck, a farm tractor, construction machinery,
airplanes, a train, or a boat of any size.
Even pure electric cars are not practical as a replacement for an ICE car
in other than very limited conditions.
--
Jim Pennino
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Wrong.
Yes, you usually are.
http://en.wikipedia.org/wiki/File:Energy_density.svg
Conventional gasoline: 34.8 MJ/L 43 MJ/kg
100LL: 44 MJ/kg 32 MJ/L
Jet A 43 MJ/kg 33 MJ/L
Lithium ion nanowire battery: 2.54 MJ/kg (experimental, bleeding edge)
Supercapacitor: .01 MJ/kg Â*(experimental, bleeding edge)
--
Jim Pennino
Ok, and let's examine the source of this data.
LOL! Some kid named Scott on Wikipedia. Ya gotta stop
believing everything you read on Wikipedia. On top of that,
this is outdated technology.
Pick any site you want and you will find the numbers are essentially the
same.
The energy density numbers will vary around a couple of percent depending
on the method used to get them, but they will not change by an order of
magnitude, which is what is needed for batteries, or three orders of
magnitude which you would need for supercapacitors.
And no, lithium ion nanowire batteries are bleeding edge technology and
don't exist outside of a lab.
Supercapacitors powering automobiles is a joke.
If you have some real source, i.e. a real company or university, of better
battery technology, let's see it.
Pie in the sky press releases don't count, only lab results.
--
Jim Pennino
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