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Make your own liquid nitrogen for under $500

Ben Krasnow built a machine that makes liquid nitrogen for under $500. It's made with many parts he bought off of eBay and can generate a liter a day of the stuff at a cost of $1.15 per liter. Check out the link for more info.

The first video is from this year's Maker Faire and the second shows the effect of liquid oxygen on a BBQ.

DIY liquid nitrogen generator

via adafruit



n2_generator_cryocooler.jpg
16 comments
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May 31, 2010. 8:09 AMmichaelgohjs says:
i love diy.. but this is... too cool..
did you build the whole machine yourself? (assemble from this and that) 
May 31, 2010. 2:29 PMkelseymh says:
Read the article provided.  This posting is just passing on information; user "fungus amungus" did not construct this device, nor make the video.
May 28, 2010. 3:21 PMlemonie says:
I would have liked to know how he produced the LOX - same method?

L
May 29, 2010. 9:24 AMkillerjackalope says:
Surely with some clever equipment you could fractionally distill air in reverse, so fractional condensation? 
May 29, 2010. 9:59 AMlemonie says:
I believe molecular-sieves are used industrially.

L
May 29, 2010. 3:00 AMnutsandbolts_64 says:
 not exactly, he said that he passed air over a tube filled with liquid nitrogen to make liquid oxygen. In comes the LN2 and air, out comes N2 and LOX. A heat exchanger comes to mind.


May 29, 2010. 3:22 AMlemonie says:
Thanks, cold-finger approach.
It'd be liquid air then, same sort of thing.

L
May 29, 2010. 7:03 AMfozzy13 says:
No way! This is so cool, I have been thinking about attempting to build a Liquid Nitrogen generator ever since I read an article about a car being run on it, since it has higher energy density than compressed air..
May 27, 2010. 6:39 PMcdubnbird says:
 maybe this is a dumb question, but what can you do with liquid nitrogen?
May 28, 2010. 4:14 PMbowmaster says:
It's intensely cold, great for freezing stuff.
May 27, 2010. 8:29 PMnutsandbolts_64 says:
 flash freeze your foods, insta-ice cubes, cryogenic storage of humans! (just joking, it would kill you) impress your friends, hardening steel (sudden contraction of the molecules causes the thing to harden, just like water) break locks, and AC unit that runs off liquid nitrogen, insta-shakes, insta-freezer (makes me think of a freeze ray)

lol, in the end of the video, he said to type "DIY liquid nitrogen" and he's the first result. guess what, he is the first result!
May 28, 2010. 5:33 AMKryptonite says:
Or making a levitating miniature train... Damn I gotta make myself one of those: almost zero friction!
May 28, 2010. 6:51 AMnutsandbolts_64 says:
 before that, you need superconductors! And, it could also be used for superconductive wiring, almost zero electrical resistance! 

I thought of another use. Pull out that cryocooler and use it as the AC for your home!  Just stick it up your ventilation system and you'll get a mini-arctic wasteland in your home! (Do not try if you have LCD TV's and screens because the technology won't work. The "L" in "LCD" stands for "Liquid" and so it'll just freeze) 
May 29, 2010. 2:01 AMKryptonite says:
As a joke I've always told my friend that it's the water in the computer screen that makes the strange patterns when you push it: it's just like the surface of water!

Joke's on me now.
May 27, 2010. 12:09 PMkelseymh says:
That's awesome, Ed!  Haven't we had a few questions/forum topics recently on the subject of building an air liquifier?  Hopefully those authors see this topic...

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