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- Xref: sparky sci.electronics:21464 sci.energy:6406 rec.autos.tech:17108
- Path: sparky!uunet!contex!marvin.contex.com!frank
- From: frank@marvin.contex.com (Frank Perdicaro)
- Newsgroups: sci.electronics,sci.energy,rec.autos.tech
- Subject: Re: Flywheel batteries as EV power source
- Message-ID: <3220@contex.contex.com>
- Date: 23 Dec 92 15:44:34 GMT
- References: <1goebdINNik@gap.caltech.edu> <3204@contex.contex.com> <72055@cup.portal.com>
- Sender: news@contex.contex.com
- Followup-To: sci.electronics
- Organization: Xyvision Design Systems
- Lines: 58
-
- In article <72055@cup.portal.com> lordSnooty@cup.portal.com (Andrew - Palfreyman) writes:
- >Frank E Perdicaro writes:
- >: As an interesting side light, the largest forging ever made is
- >: the largest flywheel ever that stores energy at MIT for the
- >: ALCATORC-MOD fusion reactor. It takes like 500 hp all night to spin it up,
- >: and 3 seconds to stop when the switch is flipped.
- >:
- >: Yeah, megajoules, many of them. If there was a quake when the thing
- >: was spinning, it would remove a large section of Cambridge.
- >:
- >: Its surface speed is just below the speed of sound, and it weighs like
- >: a very large steam locomotive ; and its right next to the FISSION
- >: reactor..... they know there is no way to stop it if there is a quake,
- >: so its just in a simple flimsy building.
- >
- >I have a problem with this; if v^2 ~= 1e5 (m/s)^2 and you've pumped in
- >about 3MJ, the mass must be about 60Kg for a disc shape. Perhaps the speed
- >is not nearly so high - this is hardly a locomotive weight!
- >(Hint: use Disc Energy = 0.5m(r*w)^2 and 1hp = 764W).
- >
-
- Why would v be 1e5? I thought the speed of sound in air was about
- 250 m/s, about 2.5e2.
-
- Perhaps I got the spinup time wrong. The thing is designed to spin
- just below the speed of sound, and is a piece of Inconel something
- like 6 feet thick and a dozen feet across. It is connected to "line"
- generator -- 13,600 VAC 3p.
-
- The flywheel weighs more than the generator.
-
- When the magnet is fired, the repulsion between the poles is enough to
- bend a forged, 1 meter thick, 3 meter diameter piece of stainless
- steel about 3 mm in something like a micro second. And fuse a volume
- of hydrogen. Use that as a energy reference.
-
- An interesting automotive aspect of this project is the plasma
- production. How do you make an arc several feet long in hydrogen?
- With the worlds largest set of points! The ballast resistor consists
- of 1 meter by 2 meter sheets of 1/2" stainless sawn zig-zag, connected
- by fiberglass rails. The stack of these sheets is about 20 feet long.
- The inductor is common 10" high pressure water pipe wrapped with something
- like 20-O copper cable. The capacitor(condensor)/switch(points) setup is
- about the size of my house. The ballast resistor gains 100 Kelvins in a
- millisecond.
-
- Once the hydrogen is plasma, the switch is flipped, and something like
- 300,000,000 amps at 0.5 vdc goes to the magnet.
-
- As we ( the American taxpayer ) have paid for all this, it is open to
- the public by appointement. The gallery with photos of much that I
- have described is amost alwyas open. There are some flywheel experts
- around that can definitly settle this question.
- --
- Frank E Perdicaro, Systems Admin, etc. Xyvision Color Systems
- Legalize guns, drugs and cash...today. 101 Edgewater Drive
- inhouse: frank@marvin, x5572 Wakefield MA
- outhouse: frank@contex.com, 617-245-4100x5572 018801285
-