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DIY Liquid Nitrogen generator

post #1 of 5
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I have always been intrigued by science demonstrations using liquid nitrogen, and often made trips to a local welding supply store with my stainless steel vacuum flask to purchase liquid nitrogen and satisfy my cryogenic craving at home. After a few fill-ups, I wondered about the possibility of making liquid nitrogen on demand. Some companies have already produced self-contained liquid nitrogen generators that are designed for small laboratories (http://www.elan2.com/). The Elan2 would be ideal for home experimenters, but the cost is over $10,000, so I decided to build a similar device with less total output, lower purity, and at much lower cost. The device that I built cost less than $500 and produces 1 liter of liquid nitrogen per day.


P1040733.jpg
has anyone on this forum tried doing this? I was browsing the net saw this and thought of using this to generate LN for overclocking experiments. I am currently not involved in LN so i really don't know but 1L (a day) doesn't seem like it would be enough.

thoughts?
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post #2 of 5
I'm in the same boat as you, but this sounds interesting! At the very least, it makes for a good read.
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post #3 of 5
very interesting read! this has always been something i thought about... but i am a bit of a science nut... so that might be why
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post #4 of 5
Interesting read for sure... But there is a hitch.

Unless you're paying U$10+ per liter, that machine will take a looooong time to become cost effective. I know LN2 prices vary by region, but the most expensive I've seen is at about $5/Liter and that is in northern Japan; prices are much closer to the $1/Liter mark in the US so it would take about 500 days for this machine to pay for itself (not counting electricity consumption)... And then there is the fact that 1 Liter of LN2 won't even be enough to do the initial pull-down of a good quality pot.
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post #5 of 5
Yeah, I'd rather pay the $40/fill than wait a month between overclocking sessions! If capacity could be to ~40L/week for under $1000, it might be worth it for the ease of use.
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