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- Xref: sparky sci.electronics:21341 sci.energy:6336 rec.autos:30294
- Newsgroups: sci.electronics,sci.energy,rec.autos
- Path: sparky!uunet!mcrware!troyf
- From: troyf@microware.com (Troy Frericks)
- Subject: Re: Flywheel batteries as EV power source
- Message-ID: <1992Dec21.193621.12001@microware.com>
- Sender: news@microware.com
- Nntp-Posting-Host: groucho
- Organization: Microware Systems Corp., Des Moines, Iowa
- References: <Bz6nuM.LCo@acsu.buffalo.edu> <1992Dec19.065254.8562@athena.mit.edu> <1992Dec19.192819.1816@adobe.com>
- Date: Mon, 21 Dec 1992 19:36:21 GMT
- Lines: 36
-
- In article <1992Dec19.192819.1816@adobe.com> pngai@adobe.com (Phil Ngai) writes:
- >In article <1992Dec19.065254.8562@athena.mit.edu> ankleand@mtl.mit.edu (Andrew Karanicolas) writes:
- >>A major disadvantage that I see with the flywheel scheme is the amount
- >>of time it would take to "charge" it up from zero energy. If the
- >>flyweel can provide a large amount of output power for a long time,
- >>then it should take at least the same time to charge it back. A
- >>scheme where flywheel systems are interchanged at "fuel" stops could
- >>alleviate this issue.
-
- This is kind of like saying that a wind up watch takes 24 hours to wind.
- You can add X ammount of energy in Y ammount of time to the flywheel and
- use X (minus a slight ammount for bearing loss) in Z ammount of time.
- ie. Charging time and dis-charge time are as unrelated in the flyweel
- as charging time and dis-charge time are in a lead-acid battery.
-
- >
- >If I were a terrorist, I would drool at the thought of being able to
- >get such wonderful bombs so easily... All you'd have to do is arrange
- >for the vacuum valve to be opened on command or the magnetic bearing
- >to be turned off, etc.
- >
- >BOOM!
-
- Modern composit materials, when used in a flywheel, will disintegrate
- with such a failuar. This bomb would be about as wonderful as some
- fiber-glass insulation falling out of your attic.
-
- >
- >--
- >My opinions are my own.
-
- -
- Troy Frericks Internet: troyf@MICROWARE.COM
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