Size of 60 kWhr Capacitor

[Thinker]

If you want to see a really big battery look up the Saft website. They have
installed a UPS in Fairbanks, Alaska that can supply a load of 40Mw for 15
minutes.





"CWatters" <colin.watters@pandora.be> wrote in message
news:HsZib.77964$ZV1.4218985@phobos.telenet-ops.be...

Using 18 x GP3300 NiMH cells you can make a battery which holds 132,000
Joules and weighs just over 1Kg. (1.1Kg to be precise). 132,000J is about
as
much energy as is released by 30 grams (one ounce) of TNT when it
explodes.



"Bob Myers" <nospamplease@addressinvalid.com> wrote in message
news:3f8c204a$1@usenet01.boi.hp.com...

"Watson A.Name - Watt Sun" <alondra101@hotmail.com> wrote in message
Just some ballpark calculations.

How about several thousand farads.
http://www.maxwell.com/ultracapacitors/products/large_cell.html
note last paragraph: http://www.maxwell.com/ultracapacitors/
FAQ: http://www.maxwell.com/ultracapacitors/support/faq.html

Right - and note that the basic "cell" is still going to be 10F at
TWO AND A HALF VOLTS, in a package of 24 x 33 x 4.5 mm
(or about 0.22 cubic inches).

E = 0.5CV^2 = (0.5)(10)(2.5)^2 = 31.25 J

A basic carbon-zinc "AA" cell provides over 5,000 J and is
about half a cubic inch - so this "ultracap" has not quite
1/80 the energy density of this very old, practically obsolete
dry cell technology.


Bob M.