thomas malloy wrote:
Robin van Spaandonk wrote:
In reply to Terry Blanton's message of Wed, 2 May 2007 20:29:15 -0400:
http://www.zenncars.com/home/EEStor%20equity%20investment%20April%2030%202007%20FINAL%202.pdf
[snip]
Inc. The negotiated investment terms also grant ZENN an additional
investment option of up to US $5 million on the same terms,
It isn't permittivity that's the likely problem, it's the breakdown
voltage.
I Searched under EEstor and found an interesting discussion of the
technology. The proposed capacitor would store several KW hrs worth of
energy, it would be stored at 3.5 KV. Someone calculated that the
energy in the charged capacitor would be equivalent to 100 sticks of
dynamite. The BaTi dielectric is brittle, and it was noted that this
sort of device does not fail gracefully, which is a euphemism for
destructive failure.
Given the energies involved, and the mechanical forces which I would
assume would be generated in charging the capacitor, I would assume it
would be a matter of time before it rapidly disassembles itself, and
the car.
--- http://USFamily.Net/dialup.html - $8.25/mo! --
http://www.usfamily.net/dsl.html - $19.99/mo! ---
But the structure is vitrified ceramic not the dielectric. Its a very
hard brick with no voids, the dielectrics break down does not matter.
Its also in a solid box that negates any easy penetration. I've
corresponded with Dick Weir the principle of EEstor. Its wrapped up very
well and the switching means that if one cap goes its isolated to that
cap. If a fuel tank has the same energy does they mean its as dangerous
as dynamite? No because the reaction has other variables: flame speed
and oxygen supply in the case of fuels. In the case of EEstor caps its
the fracture resistance of the ceramic, the percentage of the caps
broken in a breach and whether there is a earth available and the
temperature of any arc relative to thermal properties of adjacent
materials.
