Hi.

The hydraulic fluid from a pump outlet can compress air to easily 2000psi if fed to an air containing vessel.

Is there such animal in the industry ?

 

-Yes, it is easier to just use an air compressor method-

A lot of the air would dissolve in the oil. Also, unless you carefully dried the air first you would get a lot of water into the oil. Neither of those is a good thing.

How do you replenish the compressed air that you use?

 

 

I guess you could reroute the liquid back to the pump suction to drain it, open another valve to admit new intake air, and you end up with a batching process that approximates to a reciprocating compressor with a liquid piston.

 

Sounds fairly inefficient.

 

Even for an air compressor.

Edited October 21, 20169 yr by sethoflagos

.....actually, the concept may not be that inefficient.

 

See Van de Ven JD, Li PY, Liquid piston gas compression, Appl Energy (2009), doi:10.1016/ j.apenergy.2008.12.001

You could use a hydraulic motor to drive an ordinary compressor.