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- Xref: sparky sci.electronics:20912 sci.energy:6173 rec.autos.tech:16784
- Path: sparky!uunet!ogicse!news.u.washington.edu!stein.u.washington.edu!basiji
- From: basiji@stein.u.washington.edu (David Basiji)
- Newsgroups: sci.electronics,sci.energy,rec.autos.tech
- Subject: Re: Flywheel batteries as EV power source
- Message-ID: <1992Dec17.035214.15058@u.washington.edu>
- Date: 17 Dec 92 03:52:14 GMT
- Article-I.D.: u.1992Dec17.035214.15058
- References: <1992Dec13.114534.961@cmkrnl.com> <1992Dec15.004956.465@mtu.edu> <1992Dec15.194558.2556@adobe.com>,<1992Dec16.192456.6261@news.cs.brandeis.edu> <1goebdINNik@gap.caltech.edu>
- Sender: news@u.washington.edu (USENET News System)
- Organization: University of Washington
- Lines: 28
-
- carl@SOL1.GPS.CALTECH.EDU (Carl J Lydick) writes:
-
- >Er, the amount of energy that escapes is exactly the amount of energy you
- >started with. Law of conservation of energy comes into play. All the energy
- >from the flywheel will have been converted into these other forms, as you point
- >out. That doesn't mean we can ignore it. True, we're not likely to be talking
- >about hypersonic bits of the flywheel. But enough energy to move that vehicle
- >on the order of 100 miles at freeway speeds is still around there someplace.
- >It didn't just vanish. And that's a LOT of energy. And it got dumped FAST.
-
- >In other words: BOOM!
-
- >Unless you wrap the flywheel in a massive enough container that it can absorb
- >all that energy without vaporizing, you're going to have an explosion.
-
- I would design a housing of Kevlar or Spectra woven around a thin lead
- alloy lining. The lead would prevent small particles from penetrating the
- weave by distributing the force over an area larger than the mean cell
- size of the fabric. The weave would contain any larger particles so that
- the energy would be dissipated within the housing by all the mechanisms
- mentioned before, as well as a considerable portion from particulate
- collisions within the housing. The housing would be relatively light
- and could be formed into fairly complex shapes. Cost would not be prohibitive
- , probably on the order of $300, with economies of scale.
-
- David Basiji
- UW Bioengineering
- NeRD #3762
-