Chuck Branscomb wrote:
I think I am right about generating power in a car versus using a fossil fuel at a distant location to create electricity to eventually charge a battery to power said car. Take the whole path into account...fossil fuel burning at electric plant all the way to torque at the wheels from stored battery power. There is a big difference between "efficient" versus cost effective. It's definitely not cost effective at the moment to generate power locally for home consumption.
The US power system is just under 30% efficient to average end point of use (assuming line losses). Typical electric motors are ~90% efficient, so under best case conditions, the net is already under 27% (and that doesn't account for charging losses and storage losses of the battery). ICE gas engines are more efficient (>30%) and diesel engines are even higher (40+%).
Then the only way electricity is still cheaper is that we burn coal to make it and we can't effectively burn coal in cars plus coal is locally obtained and thus must be much cheaper, I guess.
At any rate, you've got to admit that in absence of other alternatives, it makes more sense to be able to use the resources we have IN this country already rather than have to import gasoline, right? And when you factor in that we *could* build more nuclear plants where the fuel really is cheaper, then it makes sense (and apparently more nuclear plants are actually going to be built soon).
You just can't seriously argue against going electric in cars.
And on the "charging batteries to run electric" thing, this is what diesel locomotives have done for years. They couldn't make a transmission that could handle the loads and torque that locomotives needed, so they are all generator based with electric motors to run the wheels. And yes, an optimized engine that never needs to change RPM is a whole lot more efficient. That's why getting CVT trannies developed is a good thing for the non-electric crowd. They won't ever be truly constant speed engines, but the window can be much narrower.
And there are people starting to look heavily into the possibility of MUCH more local power generation for homes and businesses. It's yet another thing the energy folks don't want you to know...
As much better battery technology gets developed, there's going to come a time when solar and wind are going to make a lot of sense. Semiconductors that can turn fairly raw current into high-current/very-pretty AC are getting very cheap.
--Donnie