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Re: [Phys-l] [ncnaapt] another crackpot idea from theCalifornia legislative assembly



Are you ethanol suggesting that government bureaucrats ethanol would embark on a program ethanol that would be so inefficient that ethanol it would cost more ethanol and use more energy to put in place ethanol than what you get out of it?

Bill



On Feb 28, 2011, at 5:26 PM, curtis osterhoudt wrote:



Sure, you can put down hundreds of km worth of piezos on various highways. You
still have to capture the energy, shuttle it to a useful collection station
(copper isn't THAT cheap now), condition it (which very likely means storing
it), and then do something with it. Suppose they got 2000 W-hr over the course
of a day (big assumption on my part). Scaling it to hundreds of km of roads
gives perhaps 70 GJ, which is about how much a SINGLE typical automobile used
per year in the year 2000. That's assuming 100% efficiency at every step, the
ability to feed it all into the energy grid, and whatever other generous
assumptions I've made.