On 17/02/13 13:57, polygonum wrote:
On 17/02/2013 13:49, The Natural Philosopher wrote:
On 17/02/13 11:26, Brian Gaff wrote:
I think the answer has to be 'very large'

Brian

work on a tank of fuel being a couple of hundred kwh in electrical
terms. 200kwh in 1/60th of an hours is 12MW.

So about 13,000 amps at 240V..

Of course the supercap is only enough to get you five miles.. so
probably about 130 amps

realistically it should be possible to supply those sorts of peak loads
at 'filling stations' but it wont be easy..or cheap.


But if the recharge station itself has mega-super-caps that it charges
up relatively slowly, then the delivery of power to the charging station
might be very achievable.

(Can't help thinking that filling stations canopies represent a huge
area desperate to be populated by solar cells. Though being built
next-door to nuclear power stations would be more likely to fulfill the
electricity requirement.)

Actually the way I would do it is big **** off mechanical converters
containing loads of rotational energy.

I flew once in a research plane of Decca's. Massive rotary inverters
powering the kit 'why do you not use transistorised inverters?' 'Well we
tried. And when they pulled the gear up, it all stopped for 15 seconds'

:-)

Supercaps are nowhere near good enough yet. And the thing that makes em
so fast charging - very low resistance - also makes them bloody
dangerous. Imaging a screwdriver through a supercap with a few kwh of
energy in it. You are talking serious amounts of TNT equivalent.at least
a kg.

Blow your bloody doors off!



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diminishing number of producers.