home *** CD-ROM | disk | FTP | other *** search
- Xref: sparky sci.electronics:21441 sci.energy:6389 rec.autos.tech:17092
- Path: sparky!uunet!psinntp!ncrlnk!ncratl!mwilson
- 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: <78581@ncratl.AtlantaGA.NCR.COM>
- Date: 23 Dec 92 02:16:37 GMT
- References: <1992Dec15.194558.2556@adobe.com> <1992Dec16.192456.6261@news.cs.brandeis.edu> <1goebdINNik@gap.caltech.edu>,<BzE2oz.I4H@ns1.nodak.edu> <1gp8c9INNik@gap.caltech.edu> <BzEsw7.57B@cs.uiuc.edu> <olsen.32.724613003@vetmed.cvm.uiuc.edu> <olsen.42.725052409@vet
- Organization: NCR Engineering and Manufacturing Atlanta -- Atlanta, GA
- Lines: 42
-
- In <olsen.42.725052409@vetmed.cvm.uiuc.edu> olsen@vetmed.cvm.uiuc.edu (Aart_Olsen) writes:
-
- |In article <77846@ncratl.AtlantaGA.NCR.COM> mwilson@ncratl.AtlantaGA.NCR.COM
- |(Mark Wilson) writes:
- |>In <olsen.32.724613003@vetmed.cvm.uiuc.edu> olsen@
- |vetmed.cvm.uiuc.edu (Aart_Olsen) writes:>
- |>|In article <BzEsw7.57B@cs.uiuc.edu> morrison@cs.uiuc.edu
- |(Vance Morrison)
- |writes:>
-
- |>|>1) Slow down the rate of energy dumping. ...
- |>
- |>|This is what laboratory ultracentrifuges do. Usually the rotor housing
- |>|is contained in a thick bronze casing which "slowly" absorbs the kinetic
- |>|energy. I once heard an ultracentrifuge blow, and it sounded like a freight
- |>|train for maybe five minutes. Lab centrifuges contain a surprising
- |>|amount of energy--even though they have relatively small rotors and big
- |>|motors they take quite a while to get up to speed because so much has to
- |>|be pumped into them.
- |>
- |>Do you happen to know how much one of the little beasties weighs.
- |>
-
- |Ultracentrifuge rotors weigh about 2-4 Kg. They are maybe 15 cm diameter,
- |spin at 60-80KRPM. I think the best of them these days develop 800 kilo-
- |gravities at the tube ends (the tubes fit in the rotor). They are the best
- |technology around, by the way; they are about as massive and rotate as fast
- |as current metallurgy reliably allows.
-
- Very usefull information, thanks. Do you know how much the containment
- weighs. The reason I am asking is somebody wants to put this thing in
- a car so it will have to be light.
-
- I don't have the equations handy, but from the size and speed of the rotor,
- it doesn't sound like this thing has a fraction of the energy we have
- been talking about in a flywheel battery.
-
- --
- 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
-