making liquid nitrogen from air

imsmooth

Has anyone done this as a DIY project? I want to use a refrigerator compressor with counter-current coils.

0xDEADBEEF

The foreign wikipedia claims that the Linde method uses a pressure of 200bar. I doubt, that your refrigerator compressor can produce that.

RocketSci5KN

It's infinitely easier to just buy it from a commerical vendor - it's really cheap. Any DIY attempt would likely also make LOX, which could be very dangerous.

pa5tabear

what are counter-current coils? what would they do?

i know that compressing a gas will cause it to liquefy, depending on temperature, but i don't know how electrical/magnetic fields come into play.

chill_factor

he means a countercurrent heat exchanger i.e. you have 2 plug flow reactors one in another, and on the outside one the fluid flows 1 way, the inside one you have the fluid flows another way.