What are you cooling? Hydrocarbon extraction? Ethanol?
Are you keeping it pressurized? How do you avoid dry ice build up?
I’ve seen talk of PRV’s freezing up and causing problems…
My Airgas guy wants me to use CO2 for cooling ethanol so I don’t freeze it, which seems like a valid concern.
He agrees that we can probably make direct LiqN2 injection work.
I could also direct inject LiqCO2, but then I’m getting into a different solvent system, and would need to retool.