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- Newsgroups: sci.energy
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- From: morrow@cns.ucalgary.ca (Bill Morrow)
- Subject: Re: Flywheel batteries as EV power source
- Sender: news@acs.ucalgary.ca (USENET News System)
- Message-ID: <92Dec24.183312.17315@acs.ucalgary.ca>
- Date: Thu, 24 Dec 92 18:33:12 GMT
- References: <1992Dec16.192456.6261@news.cs.brandeis.edu> <72182@cup.portal.com> <51695@seismo.CSS.GOV>
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- Organization: University of Calgary
- Lines: 27
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- In article <51695@seismo.CSS.GOV>, stead@skadi.CSS.GOV (Richard Stead) writes:
- > Stop and go driving will require MORE energy, not less.
- >
- > That's right - why do you think city mpg are less than highway? I mean, for
- > city dirving, since the velocities are lower, you fight less air resistance -
- > in you naive system, city driving would have better mpg.
- >
-
- City driving mpg figures would be higher, if we didn't sit in traffic jams and
- at red lights with the engine doing nothing useful. Calculate mpg
- subtracting out the gallons consumed when not moving. Depending on where you
- drive, I'm sure that *effective* city mpg is considerably higher.
- The obvious advantage of the EV is that the drive motor consumes nothing
- while in gridlock. The not so obvious disadvantages as that we can't use
- the waste heat to warm up the passenger compartment, on a day like today.
-
- On the ball-of-fluff-at-plasma-temperatures front, has anyone any useful
- information on the many small flywheel scenario described in the last IEEE
- Spectrum issue? If I remember right, one reason for going this route was that
- if one of these micro-flywheels failed, it wouldn't make the whole "battery"
- go ka-BOOM. Also, I believe there were advantages in the design of magnetic
- bearings and such for tiny flywheels. How much energy in a fly-wheel 1cm
- across spinning at 1Mrpm :) ?
- __________________________________________________________
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- Clinical Neurosciences fax: (403) 283-4740
- University of Calgary e-mail: morrow@cns.ucalgary.ca
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