Can the pressure of liquid air/gas can be increased?

[pranj5]

I want to know whether like liquid water or other liquids available at normal temperature and pressure, can the pressure of liquid air/gas be increased mechanically? If yes, then what kind of machinery can do the job? I am asking the question here not on the theoretical part, but on the practical aspect.

 

[billy_joule]

https://en.m.wikipedia.org/wiki/Liquid_air
https://en.m.wikipedia.org/wiki/Gas_compressor
https://en.m.wikipedia.org/wiki/Cryocooler
http://benkrasnow.blogspot.co.nz/2008/08/diy-liquid-nitrogen-generator.html?m=1

 

[Mech_Engineer]

Options are to increase the mass of fluid within a fixed container, or to decrease the size of a container with a fixed mass of fluid. Either would increase the pressure of the fluid.

Practically speaking, this means you can either:

• Pump the fluid into a fixed volume container, the more fluid you pump in the higher the pressure (requires a high-static-pressure pump). This might be the more common method because it can support continuous flow.
• Compress the fluid in a container which can change size, like for example a piston-cylinder combination.

 

[pranj5]

I can understand the principle. But, problem is what kind of machinery can perform at such low temperature.

 

[Mech_Engineer]

How about a cryogenic pump?

http://www.barber-nichols.com/products/pumps/cryogenic-pumps

 

[russ_watters]

I can understand the principle. But, problem is what kind of machinery can perform at such low temperature.

What low temperature? Liquid water is not a very low temperature.