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- Xref: sparky sci.electronics:22146 sci.energy:6693 rec.autos:31127
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- From: ems@michael.apple.com (E. Michael Smith)
- Newsgroups: sci.electronics,sci.energy,rec.autos
- Subject: Re: Flywheel batteries as EV power source
- Message-ID: <1992Dec28.220947.19148@michael.apple.com>
- Date: 28 Dec 92 22:09:47 GMT
- References: <51694@seismo.CSS.GOV> <1992Dec22.204130.18133@enterprise.rdd.lmsc.lockheed.com> <1hnnrdINNnna@gap.caltech.edu>
- Organization: Circle 'C' Shellfish Ranch, Shores-of-the-Pacific, California
- Lines: 32
-
- In article <1hnnrdINNnna@gap.caltech.edu> carl@SOL1.GPS.CALTECH.EDU writes:
- >In article <1992Dec22.204130.18133@enterprise.rdd.lmsc.lockheed.com>, () writes:
- >=Obviously this fluff created by a failed flywheel is not exactly safe. But
- >=you contain this fluff inside another carbon carbon shell such that the
- >=expanding hot fluff makes more fluff until the energy is such that it can
- >=be contained by a container. The object is not to stop the flywheel failure
- >=at any given point, but to slow it down and cause it to loose energy.
- >
- >Yup. Now, since someone has calculated that the flywheel is storing enough
- >energy to VAPORIZE 40 kilograms of iron, just how big is your containment
- >system going to be? Will there be room for people in the car?
-
- Hmmm ... an interesting question arises from this oft' posted phrase
- 'VAPORIZE 40 kilograms of iron' ... Since this is only 88 lbs of
- stuff (and my car weighs about 2000lbs) it isn't THAT much of a
- weight penalty ... So just how much of a very high heat of vaporization
- substance would it take to absorbe the heat as phase change? Say, for
- example, water? (Or whatever is even better suited...). If one could
- wrap the flywheel in a 200 lb water jacket and still be lighter than
- a lead/acid battery pack, it might still be 'reasonable' ...
-
- Now, getting all that KE dumped evenly into the water jacket could be
- quite a trick ;-) and will be left as an excersize for the reader ;-) ;-)
-
- --
-
- E. Michael Smith ems@apple.COM
-
- 'Whatever you can do, or dream you can, begin it. Boldness has
- genius, power and magic in it.' - Goethe
-
- I am not responsible nor is anyone else. Everything is disclaimed.
-