Re: 1200 mile range electric car

On Feb 4, 12:58 pm, "Bob Eld" <nsmontas...@xxxxxxxxx> wrote:
<dave.walt...@xxxxxxxxxxx> wrote in message

news:1170613679.438912.185380@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx





On Feb 4, 7:58 am, "Bob Eld" <nsmontas...@xxxxxxxxx> wrote:

Cut.....

How do you eliminate CO2 if the electricity is produced from burning
coal
and natural gas as is most electricity in the US? I'm all for elecrtic
cars
and think they are a positive step forward but lets watch the the hype
and
rhetorical BS.

Of course here the argument goes into nuclear vs wind vs solar, to
provide the electricity. I'm very much pro-electric car, even for the
short 100 mile limitation so long as they have onboard 120v
transformers so they can be plug-and-play (since I work at a power
plant...well, the reasons should be obvious). Even though there is
plenty of fossil fuel for decades or so, it makes just plain sense to
develop E-Vs and eliminate the fossil cycle, EVEN if the power comes
from fossil power plants, given the economy of eiffiency, why even
produced gasoline execpt for special purposes?

David

Is there a plan to replace America's coal and natural gas plants with solar,
wind or nuclear facilities? I don't think so, not anytime soon.... So, lets
watch the rhetoric about a single new car model, the Volt, reducing CO2 by
4.4 tonnes. Furthermore, what is the overall efficiency from a lump of coal,
through a rankine cycle steamplant to electricity, through a power
transmission network, to a vehicle, through its charger and battery cycle,
through an inverter, through motors and gearing to the drive wheels? How
does this compare to an ICE's overall efficiency and what are the CO2
implications?- Hide quoted text -

- Show quoted text -

I'm not sure what you are comparing. Coal plants are about 30%
efficient (probably more but that's what I remember as "real good").
NG is up to 40% and nuclear is...nuclear, fuel costs don't constitute
a major cost. What is the efficiency of burning (after refining the
oil) of gasoline in a ICE? I really don't know. But it's not
good...which is why they try never to use gasoline or diesel engines
to produce electricity IF they can do it through traditional base
loading.

The power from the grid (that is, 'coal') to the battery is also an
important question, for sure,which is what I think you are asking,
giving 'line' loss, battery effiency, etc.

Someone have the answer?

David

.

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