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- Path: sparky!uunet!haven.umd.edu!darwin.sura.net!seismo!skadi!stead
- From: stead@skadi.CSS.GOV (Richard Stead)
- Newsgroups: sci.energy
- Subject: Re: Flywheel batteries as EV power source
- Message-ID: <51699@seismo.CSS.GOV>
- Date: 22 Dec 92 23:11:38 GMT
- References: <1992Dec15.194558.2556@adobe.com> <STEINLY.92Dec22144421@topaz.ucsc.edu>
- Sender: usenet@seismo.CSS.GOV
- Lines: 32
- Nntp-Posting-Host: skadi.css.gov
-
- In article <STEINLY.92Dec22144421@topaz.ucsc.edu>, steinly@topaz.ucsc.edu (Steinn Sigurdsson) writes:
- > Now, I've asked this several times before, does anyone know
- > the claimed Q for these beasties? If they're are as good as
- > the best mesoscopic physical systems I know of they should discharge
- > significantly over a weekend - somewhat of a problem for a family
- > commuter car, puts a pretty steep overhead on keeping the tank full.
-
- Awww, let's give that to them. Assume the magnetic suspension is done
- with very efficient room-temperature superconducting magnets, and that
- the vacuum is perfect. Then there are no losses. Any inaccuracies in that,
- and will treat it the same as the gas that manages to escape your tank over
- a weekend. Or maybe the leakage current in the batteries of a standard
- electric car? Anyway, the flywheel will probably lose more, but not so
- much to worry about if they design the vacuum and magntic suspension well
- enough.
-
- (oops, I guess I assumed the flywheel itself is perfectly balanced as well,
- and there is no vibration of the housing when the car is parked.)
-
- Let's say they have a regenerative system, and when the car is parked, they
- just sell the the energy back to the electric company off the flywheel, and
- leave the flywheel parked until enough time before they are ready to use it
- again to allow for full charging. That way we can still give this point
- to them. No biggy since the flywheel can't be built, and would explode
- if it was.
-
-
- --
- Richard Stead
- Center for Seismic Studies
- Arlington, VA
- stead@seismo.css.gov
-