Really? 52% of the electrical power in the US is generated by burning
bituminous coal, 21% in generated with nuclear power. Around 12%, by means
other than fuel oil. The vast majority of the carbon base products, produce
us in the US, comes from crude oil.
It would appear using less electricity would be a greater benefit to the
environment, but of course you are free to believe whatever you choose
;)
mike
> Lee Iacocca, who used to work for Ford, talked about the American auto
> makers.
> He said that plug-in hybrids will be the next big thing. It makes sense.
> To me, this makes sense. We already have the infrastructure, charging the
> batteries in the middle of the night, when electrical use is lowest, would
> help decrease our dependence on foreign oil, and could improve overall
> efficiency.
> Jeff
Jeff - 26 Apr 2007 16:40 GMT
> Really? 52% of the electrical power in the US is generated by burning
> bituminous coal,
I believe that increasing our use of bituminous coal would decrease our use
of foreign oil. Using plug-in electrics would do this. As you kindly point
out, most of our electricity comes from coal. Using coal instead of oil
would decrease our dependence on foreign oil.
>21% in generated with nuclear power. Around 12%, by means other than fuel
>oil. The vast majority of the carbon base products, produce us in the US,
>comes from crude oil.
Right, and using coal to produce electricity which would then power vehicles
would reduce the dependence on foreign oil.
> It would appear using less electricity would be a greater benefit to the
> environment, but of course you are free to believe whatever you choose
As you point out, nuclear power can also produce electricity. If more
nuclear power plants are built, they can help move cars and trucks, too. In
addition, if CO2 generating power plants sequestor the CO2 so it doesn't get
into the atmosphere, that would help too.
Plus, plug-in hybrids might use the energy more efficently, so that it takes
less energy overall to power the cars.
Have a lovely day!
Jeff
> ;)
>
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>
>> Jeff
Mike Hunter - 26 Apr 2007 19:59 GMT
Ya' producing more electricity buy burning more bituminous coal, sound like
a great idea. If one even mentions nuclear power the environuts go
well......NUTS. You however are free to believe whatever you choose. ;)
mike
>> Really? 52% of the electrical power in the US is generated by burning
>> bituminous coal,
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>>
>>> Jeff
DH - 26 Apr 2007 18:56 GMT
> Really? 52% of the electrical power in the US is generated by burning
> bituminous coal, 21% in generated with nuclear power. Around 12%, by
[quoted text clipped - 5 lines]
>
> mike
Right out of the box, it's actually more efficient to power a car by coal
through its batteries than to use gasoline. Power plants are generally
about as close to best possible thermodynamic efficiency as you can get and
transmission, generation and conversion losses are very low.
And, as Jeff points out, separately, we can take further advantage of new
generation technologies (e.g, photovoltaics, wind, nukes, tidal) to further
cut dependence on foreign oil. And reduce GHGs.
>> Lee Iacocca, who used to work for Ford, talked about the American auto
>> makers.
[quoted text clipped - 6 lines]
>
>> Jeff

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Mike Hunter - 26 Apr 2007 20:02 GMT
We may even save the world from the evil deeds of man in the process.
;)
mike
>> Really? 52% of the electrical power in the US is generated by burning
>> bituminous coal, 21% in generated with nuclear power. Around 12%, by
[quoted text clipped - 25 lines]
>>
>>> Jeff
C. E. White - 27 Apr 2007 13:23 GMT
> Right out of the box, it's actually more efficient to power a car by
> coal through its batteries than to use gasoline. Power plants are
> generally about as close to best possible thermodynamic efficiency
> as you can get and transmission, generation and conversion losses
> are very low.
Can you cite any backup for this claim? I don't know if it is true or
not and I'd love to see the numbers either way. Here goes some rough
numbers pulled from the internet:
For an electric car:
Coal to electricity conversion efficiency - 36% to 38%
Transmission line losses - 5%-10% (Or 90% to 95% efficient)
Efficiency of battery charging / recovery - 66%
Efficiency of electric motor - 90%
Drivetrain Efficiency - 97%
Overall efficiency ~ 18% to 21%
For an IC car
Typical efficiency of low compression IC engine - 26%
Driveline efficiency -95%
Overall efficiency ~ 25%
Of course for the electric car, you can actually use braking energy to
recharge the batteries, so this improves the overall efficiency
compared to a traditional IC car where all the braking energy is
thrown away. I suspect this puts the electric car ahead of the
traditional IC powered car in terms of efficiency, but not in front of
a IC/electric hybrid, which can also recover braking energy.
Ed
Jeff - 27 Apr 2007 14:00 GMT
>> Right out of the box, it's actually more efficient to power a car by coal
>> through its batteries than to use gasoline. Power plants are generally
[quoted text clipped - 24 lines]
> in terms of efficiency, but not in front of a IC/electric hybrid, which
> can also recover braking energy.
There is another advantage to using an all electric car (with backup
generator, which is what a plug-in hybrid is): The electric motors don't
work when the car is stopped, like at a stop light.
I, too, would be curious to see the numbers.
Jeff
> Ed