In article , Doctor Drivel
scribeth thus
"tony sayer" wrote in message
...
But there are still serious problems with implementing these the main
one is the primary power system. Batteries, unless someone does invent
one that is neigh on 100% efficient and has much greater capacity and
costs and weighs sod all, will always be their great limitation.
Oh my God!!
An EV is fine for 90% of "all" car trips made per year - fine for 100% of
trips only in towns and cities. It is the odd long trips, which overall in
a country is small, which requires some focus - and this keeps advancements
down. The "poor" range extender in the Volt is giving a claimed ~60mpg with
the car not running on the battery. So not bad. The Russian rotary vane
engine range extender offers far more.
So what are all those motahs doing on the A14 earlier, just tootling
from one village to the other?..
I've been on a 120 mile round trip today I might end up doing that again
or more next week. I might not go anywhere the week after ...
A car that is only capable of some 60 miles range without recharge is
about as useful as tits on a bull.
I rather expect that is the Case with a lot of other vehicle users...
Note below, "90% charge in less than 5 minutes".
http://www.toshiba.com/ind/data/news/news_241.pdf
Toshiba International Corporation, January 27, 2010 - Toshiba proudly
announces that it has established US-based sales and technical support for
its new product, the Super Charge Ion Battery, SCiBT. This nano-based
breakthrough lithium technology is noted for its rapid charging capability
of 90% charge in less than 5 minutes, long life of more than 10 years even
at rapid charge rates, and excellent safety performance. The SCiBT product
line will be supported out of the Toshiba International Corporation
headquarters in Houston, Texas and the SCiBT team will focus on business
development activities, battery pack design, prototyping, assembly,
technical support, and service.
The SCiBT battery technology offers numerous performance advantages that
make it an ideal solution for many of today's toughest energy storage
challenges.
Right so what power can that store then compared to a conventional
battery and if so is it cost effective for a motor vehicle application
giving say a "useful" capacity and range?. I'd like a range of say 400
odd miles on a tankful or charge...
The secret is brake regen and supercapacitors/efficient batteries. The new
Russian hybrid using the rotary vane engines range extender uses
supercapacitors.
Well if your going to add in another engine why bother with all the
electric traction?..
Compressed air brake regen would have been feasible, and
air is free, but R&D in supercapacitors and batteries may have pushed air
into the background for now.
Regen?, Perhaps some use around town for a Taxi but on a Motorway at
around the 70 limit?. Doesn't seem that practical..
To hear misguided politicos wittering on about "non polluting" when the
power is in the main supplied by coal and gas, the power generated
conversion a not to high percentage, and then transmitted and stored
with yet another conversion does indeed deserve the worthy comment Knob
head...
Coal smoke stacks can be controlled.
Gas is very clean.
Except you might have missed it that it wasn't that much spare in supply
around a week or so ago. Not too practical is it..
So, 40% efficient
from power station to socket. 80^ of the energy in cars tank is wasted, so
20% efficient.
Really, as low as that?..
A battery wastes only 10% at most so 90% plus efficient. It
does not take much maths to see the EV is more energy efficient from station
generator to EVs wheels - as it stands RIGHT NOW !!!!
Even if that is right where are we going to get all this extra energy
from?..
Clean up the towns and cities and its cascades to all over.
Yes so why aren't we doing that right now with electric vehicles?..
--
Tony Sayer