DIY Liquid Nitrogen Generator(benkrasnow.blogspot.com)

70 pointsby Mark_Bقبل 16 سنة12 comments

benkrasnow.blogspot.com

http://benkrasnow.blogspot.com/2008/08/diy-liquid-nitrogen-generator.html

12 comments

arsقبل 16 سنة

Just be careful about doing this without the nitrogen separation membrane. Because liquid nitrogen boils before the liquid oxygen (or alternately it's easier to condense liquid oxygen), you will end up with a container full of liquid oxygen.

Now, while that can be fun to play with, it's pretty dangerous if you are not expecting it.

bh42قبل 16 سنة

Now, while that can be fun to play with, it's pretty dangerous if you are not expecting it.

That's kind of an understatement when it comes to liquid oxygen.

lutormقبل 16 سنة

I was going to say: why would you want to separate out the O2. Many more interesting things that can be done with liquid O2 than N2... ;-)

olefooقبل 16 سنة

"Information regarding these membrane units is easy to find on the internet, but good luck buying one! They are nearly all produced for huge industrial installations, and those manufacturers will not even return phone calls from interested hobbyists."

I look forward to seeing the equivalent of sparkfun for homebrew cryogenics.

sbierwagenقبل 16 سنة

Interesting, though, for DIY, I was expecting him to do it the way Linde did, back in 1894, that being:

  Compress some dry air.
  This will heat it up, so cool it down.
  Return it to atmospheric pressure.

While expanding, it, of course, gets even colder still, and condenses. Liquid nitrogen is old tech, older than you might think.

surlyadopterقبل 16 سنة

Very cool. I love seeing people cobble together high tech/complex equipment in their garage.

This could come in handy for the insane overclocking crowd and the arguably insaner DIYBio crowd. The advantages of being able to store cell/other cultures in LN should not be underestimated. Countdown to Homeland Security/FBI overreaction in 3, 2...

Jun8قبل 16 سنة

What would you do with the liquid Nitrogen you generate? What is the hello world app of cryogenics?

cpercivaقبل 16 سنة

What is the hello world app of cryogenics?

Making ice cream.

pbhjpbhjقبل 16 سنة

I thought it was desiccating flowers.

jgammanقبل 16 سنة

safety tip for storage is a pressure relief valve on the tank and beware of suffocation risks during/if a LN2 spill, gas volume of N2 may displace enough air for asphyxiation to occur - good labs have O2 sensors in their LN2 storage areas. never transport a thermos of LN2 in your car or a lift etc

tjmaxalقبل 16 سنة

seems like he got very lucky/spent a very long time searching ebay to find the right parts to make this work. I don't think you would easily be able to replicate this.

surlyadopterقبل 16 سنة

Very true, but just remember "what the eye of man can conceive, a cheap factory in Shenzhen can achieve".