🚀 go-pugleaf

In sci.engr, rizzo@cbnewsf.cb.att.com (anthony.r.rizzo) writes:

>I'm sure that it's possible to contain some fluid at 100,000 psi.
>I'm not sure that air is still a gas at 100,000 psi, though.
>I would have to look into the matter.  It's been too long
>since I had thermodynamics.

Actually, I would think that this would be highly desirable! Think of
how an aerosol can works- the vapor pressure of the liquid propellant
maintains a reasonably constant pressure inside the can. Hence a
tank of liquid air would provide not only much more air than
a tank of compressed air, but would also provide pretty much even
pressure to power the hypothetical car.

questions: what pressure would be needed to keep air liquid at room
temp (or for that matter at say 50-60C to account for parking the 
car in the hot sun without the tank doing nasty things)?

   What amount of usable energy could be stored this way, taking the
efficiencies of the system into account?

  How do you keep the liquid air from fractionating, or if it does do so,
how do you deal with the effects of this? Or would you want to do this
with nitrogen rather than air?

I suspect very low energy density and very heavy tanks.

Aynone have some numbers handy?

Stan Bischof
HPSR