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'[OT] Flywheel power, was Path to freedom'
2006\08\06@122443 by Tony Smith

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{Quote hidden}

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

2006\08\06@151321 by Gus S Calabrese

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


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

{Quote hidden}

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

2006\08\06@172953 by William Chops Westfield

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On Aug 6, 2006, at 9:24 AM, Tony Smith wrote:
>
> 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.

Rough calculations say that's equivalent to less than a gallon
of gasoline.  Chemical energy is VERY dense, especially if you
get half (more than half, actually) of your reactants from the air.
Presumably that's why batteries win out over competitors (likewise,
compare even the most spectacular supercaps to batteries...)

BillW

2006\08\07@015628 by Tony Smith

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> > 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.
>
> Rough calculations say that's equivalent to less than a
> gallon of gasoline.  Chemical energy is VERY dense,
> especially if you get half (more than half, actually) of your
> reactants from the air.
> Presumably that's why batteries win out over competitors
> (likewise, compare even the most spectacular supercaps to
> batteries...)
>
> BillW


Looks like the market for these flywheels is to power your business between
the time the electricity cuts out until the generators cut in.

The figures they are quoting (200KW/10sec etc) sound like that.

Tony

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