Question about liquid nitrogen

[Mykodacon]

If it were placed in a sealed copper tube, and neoprene was placed all around it except for the part that is touching the cpu - why wouldn't it work if an aparatus was made that would hold it into place?

Does it "evaporate" through the tubing somehow or just turn into a gas? I know nothing about it and am just curious.

Mike

[Thaddy]

First of all, I'm no expert, so take my advice for what it is - my best guess/knowledge.

That having been said - the thing is with LN2 is that it has an extremely low boiling point. Therefore, unless you can keep it a) under very high pressure (such as the pressure kept in those cylidrical containers) or b) at a very low temperature (something like -190C), it will invariably turn to vapour, and you have to let it out or face an explosion ;).

I have actually been thinking about this myself, and was about to post about it - how much would a system to turn LN2 vapour back into liquid cost? How much space would it take up? I talked to a refrigerator mechanic about it in passing, and he implied that it's both expensive and space-consuming, but maybe I just incorrectly inferred that.

Bowman? Gary? Anyone?

[berkut]

These canisters arent high pressure, the LN2 inside is @ -196C as a liquid (otherwise it would be imposible to take out of that bottle)

Its almost imposible to make such a thing in home, it would consume 10kw of electricity at least (a phase change unit) but you could do a knother thing: buy a stirling cycle engine and liquify LN2 yourself (at a very small rate cause these engines dont pump to much heat @ -200C) for your exsperiments

[Thaddy]

I just did a search and apparently these stirling cycle engines cost tens of thousands of dollars, USD. :eek: :slobber:

[berkut]

there are friges with stirling cycle engines.... read an art @ procooling.com