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- From: mwilson@ncratl.AtlantaGA.NCR.COM (Mark Wilson)
- Newsgroups: sci.electronics,sci.energy,rec.autos.tech
- Subject: Re: Flywheel batteries as EV power source
- Message-ID: <77848@ncratl.AtlantaGA.NCR.COM>
- Date: 18 Dec 92 16:00:57 GMT
- 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>,<1992Dec17.035214.15058@u.washington.edu> <1gov35INNik@gap.caltech.edu>,<1992Dec1
- Organization: NCR Engineering and Manufacturing Atlanta -- Atlanta, GA
- Lines: 42
-
- In <BzF5L0.LzK@cs.uiuc.edu> morrison@cs.uiuc.edu (Vance Morrison) writes:
-
- |You are making two assumptions that may not be justified. First you assume
- |that all energy gets dumped as heat. It is quite possible that this
- |energy can be dumped into some sort of chemical energy, (heat of fusion,
- |vaporization or endothermic reaction). Granted, I have not given a
- |possible scenerio, I merely point out that conservation of energy is NOT
- |a proof of infeasibility.
-
- My whole point has been that the containment vessel will have to be big
- enough to absorb all of that heat without melting or vaporizing. I guess
- getting very hot is not relevant as long as the vessel is suitably
- insulated and kept away from the passanger compartment.
-
- |Second, heat by itself is not THAT bad. I really don't care if the flywheel
- |compartment is hot enough to melt steel as long as I survive the crash
- |unburned. If the crash was bad enough that I don't survive, does it matter
- |that much if I get burned too?
-
- This just means that we have to make the flywheel strong enough not to
- fail in any collision that is not likely to kill the passangers outright.
-
- The problem with heat is that it can cause
- |explosions if released too quickly. Preventing explosions IS a goal
- |that good engineering has a chance of accomplishing. Again, I don't offer
- |solutions, just pointing out that it is not as hopeless as you make it
- |out to be.
-
- I never said that it would be hopeless, just that the amount of engineering
- required to make this thing safe would make it too heavy and or expensive
- to be usefull as a power source for a car.
-
- |On the other hand, I could see how solving these problems might be expensive
- |and that a better overall solution could be found to the EV problem by
- |not using flywheels as the primary storage device.
-
- Agreed.
- --
- Mob rule doesn't become any prettier, just because the mob start to call itself
- a government.
- It ain't charity if you are using someone else's money.
- Mark.Wilson@AtlantaGA.NCR.com
-