An idea

[JoT]

Ah ok I see.
Well LN2 will actually boil(which is how it takes so much heat away and is so cold, because it boils much much MUCH lower than water) off more than propane, so it wont last as long as propane.Plus I wouldn't know where to get LN2, but you can get propane everywhere.And it would last quite awhile probably.

Regarding propane:
How long is quite awhile? And there's absolutely no way to reuse it without a compressor or something along those lines?

 

[aenigma]

Regarding propane:
How long is quite awhile? And there's absolutely no way to reuse it without a compressor or something along those lines?

I don't know how long quite awhile is, longer than LN2 though....
I have never done it.

 

[JoT]

I don't know how long quite awhile is, longer than LN2 though....
I have never done it.

oh, sorry, I was under the impression that you had, and maybe were using it right now

 

[aenigma]

oh, sorry, I was under the impression that you had, and maybe were using it right now

Nope i use a phase change system, havent done total loss cooling.