Doing it right now. Have an automobil airconditioning compressor connected to the turbine. When the batteries are charged, system simply engages the electric clutch and it starts compressing the air. Now that I have my HPA tank back, I can compress to 4500 PSI, All of this then goes to a tesla turbine, we ran a test on it yesterday that put out 150psi, was running 4 3/4 hp induction motors. We only had about 250 PSI of air through the whole system, so it only lasted about 5 minutes at that pressure. Started losing speed at about 130psi. If I lightended the load, would be able to run at lower regulator pressures. 1500watts for about 20 minutes off that tank. Can't wait 'till she's charged all the way.
BTW, for presure control, just wire in a presure switch (Very expensive at HPA pressures) and have that connect the alternator to a regular dump load and shut down the compressor.
Note, HPA is nothing to play with. If anything goes wrong with it, your going to want your will filled out. I'm a certified airsmith, and I walk on egg shells with it. Don't try to fill just any tank to anything more than 125psi, also, if your using an a/c compressor, make sure you cool off the air charge before it hits the tank. An HPA tank MUST be kept below 150 deg F. to maintain it's rating. Also in most states you MUST have a boiler operators license for anything over 5 gal and 125-150 PSI.
But it does work, and work well.