PRodQuanta said:
http://www.evworld.com/library/abrooks_carb_nov2_05.pdf" seems to think that electric is the way to go (over hydrogen) for automobiles. It is more geared toward CO2 emissions.
I am interested in what you all think of this!
That's a pretty flawed report. I must admit that some of their fuzzy math escapes me, but they miss a couple of key points:
-It looks like they are attributing
negative emissions to renewable energy based on the emissions that
would have been produced by other sources. No. Zero is zero.
-Hydrogen can be generated for free with waste heat from existing power plants.
-They note that you need to increase generation capacity to handle either, but if you are adding energy capacity for that specific purpose, you can attribute all the usage to it. Ie, in
either case, you end up with zero emissions. So the relevant factor is simply which can do more with a kW of energy. The answer is
probably batteries, depending on how well steam reforming of methane works,
but...
-They don't discuss the performance or economics of the vehicles. If batteries were good enough and cheap enough, we wouldn't need to have this conversation.
http://www.evworld.com/library/Tesla_21centuryEV.pdf" in the EV World library that argues EV over hydrogen and gasoline.
-They mention steam reforming but don't consider the retrofit of existing plants to capture free (currently wasted) energy for it.
-They don't mention economics - and why would they? That's literature for the Tesla Roadster.
-They mention that if future power plants are used for a study equal consideration should be given to electric and hydrogen (ie, either attribute all of it or whatever the fraction of power in the grid it comprises - either way, be consistent). However, again, you can get extra energy by capturing waste heat to make hydrogen.
-They don't mention range. I'm skeptical of their range claims.