I want one of those soooo bad     send me your discarded ones
AGSC


On 2006-Aug 06, at 10:24hrs AM, Tony Smith wrote:

>> For me in 2002, the idea was to build a house in the
> western desert of
>> the US, self-sufficient, with wind generator and batteries
> for light
>> storage, and use compressed air for long-term storage. For
> safety, the
>> compressed air tanks had to be buried deeply underground.
> The reason
>> is that in the US Western desert, wind speeds are high for several
>> months of the year, then low for several months, and excess
> wind power
>> would run compressors to store excess power. I think it is feasible
>> for a house, but NOT feasible for a vehicle, because
>> (1) an accident could result in a disastrous explosion, and
>> (2) extra weight would be needed to make the tanks strong enough to
>> withstand 2000psi+..
>
>
> Compressed air has a lot of power but not much energy, high
> volts but low amps, you might say.
>
> Can you claim the fishing method as environmentally friendly?
>
> They is/was a company making flywheels to store energy for
> houses, you dug a hole & dropped it in there.  They were
> targetting them at businesses to use as back up power,
> replacing petrol generators & UPS batteries.
>
> Fairly safe, if the flywheel exploded, well, it's in a hole
> in the ground.
> They were in a low pressure (maybe a vacuum) container with
> magnetic bearing, so 'self discharge' was low.  Not a bad
> idea if you can get it to work.  Would last a long time too,
> not much to wear out.
>
> Tony


Interesting, Google found not only people selling them, but people  
buying
them.  Doesn't seem to be the 'hole in the ground' ones.

http://www.pentadyne.com/spec_vssdc_plus.htm, claims 60kW load for 45
seconds.  That should power your house for, oh, 20 minutes or more.   
Big &
heavy too.  Lasts over 20 years.  99.8% efficency?

http://www.powerware.com/UPS/PF2_Flywheel_specs.asp, lots of  
versions.  I
wonder if they just change the flywheel mass...

Wonder what they cost?  Anyone got one in the basement?

Tony

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