alt.energy.renewable

The air that is compressed and put into the storage tank that, I assume,
is mounted in the vehicle, from where does this air come?

Is the air modified in any fashion before it is put in the tank?
Is there any water vapor in the air?

What is the volume of the expansion space at TDC (Top Dead Center)?
What is the volume of the expansion space at BDC (Bottom Dead Center)?

What is the temperature of the air at TDC?
What is the temperature of the air at BDC?

David Williams wrote:

>-> Yes, but the thread is about a tiny commuter car that has very little spa
>-> to spare. Plus, you ignored the "throttling losses" which occur when you al
>-> the stored gasses to expand without allowing them to do useful work.
>
>It's not necessary to do that. The high-pressure air can be put, still
>at high pressure, into the cylinder when its piston is at the top of
>its stroke, and then allowed to expand, driving the piston downward.
>This can be done at every stroke of the piston, or every-other stroke,
>or 217 times in every 1000 strokes, or whatever. The frequency at which
>air is put into the cylinder determines the power, without any
>"throttling loss".
>
>I've seen old gasoline-powered "stationary engines", intended for use
>on farms, that did much the same thing. Instead of firing at every
>stroke, they fired only once every few seconds, with a deafening bang.
>When more power was needed, they fired more often.
>
> dow
>
>