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- Xref: sparky sci.electronics:20874 sci.energy:6160 rec.autos.tech:16762
- Newsgroups: sci.electronics,sci.energy,rec.autos.tech
- Path: sparky!uunet!noc.near.net!news.cs.brandeis.edu!chaos.cs.brandeis.edu!andyh
- From: andyh@chaos.cs.brandeis.edu (Andrew J. Huang)
- Subject: Re: Flywheel batteries as EV power source
- Message-ID: <1992Dec16.192456.6261@news.cs.brandeis.edu>
- Sender: news@news.cs.brandeis.edu (USENET News System)
- Organization: Brandeis University
- References: <1992Dec13.114534.961@cmkrnl.com> <1992Dec15.004956.465@mtu.edu> <1992Dec15.194558.2556@adobe.com>
- Date: Wed, 16 Dec 1992 19:24:56 GMT
- Lines: 42
-
- In article <1992Dec15.194558.2556@adobe.com> pngai@adobe.com (Phil Ngai) writes:
- <regarding flywheel energy storage>
- >But how hot would this "cotton" be? You're dumping what is presumably
- >the equivalent of several gallons of gasoline's worth of energy.
- >That's a very large amount of energy.
- >
- >I hope they do lots of crash tests before unleashing such a dangerous
- >technology on the unsuspecting public.
-
- <I have to admit an emotional response to this since I think that
- flywheels have tremendous potential.>
-
- 1. I think that it is unfair to call it "such a dangerous technology"
- based solely on your own opinions, without having done any
- investigation on your own.
-
- 2. There are several places for the energy to go during an explosion.
- Since the energy is kinetic, a lot of it will end up as particle
- velocity. Some will dissipate into the air as air friction (some hot
- air as a side effect). A quantity of energy will go into the
- mechanical breaking of the flywheel disk itself. Some more will go
- into the penetration of the flywheel housing. What residual energy
- escapes these will have to be determined by testing.
-
- 3. You don't need to destroy cars to test the safety/danger of
- exploding flywheels. You just take a flywheel, spin it to 10 times
- its rated capacity, and give it both barrels of a 10ga shotgun loaded
- for elephant. If it explodes, you measure the explosion. If not,
- send it to Ralph Nader for further tests.
-
- The potential for these IS tremendous. As I remember, the power
- output of a flywheel is roughly "equivalent to a V8" in a much smaller
- volume and weight. Couple this with a super efficient small engine
- running full time at maximum efficiency, minimum pollution to keep the
- flywheel "charged" and you can get power, economy, cleanliness and range.
-
- -andy
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