Making liquid nitrogen from scratch (an absurd amount)

EVERYONE WAKE UP NILE RED POSTED HIS YEARLY VIDEO

“Worst financial decision of my life” that’s a high bar for someone who buys at least one giant industrial machine per YouTube video

Barely a minute in, and Nile already states his intentions to turn air into a bomb, truly one of the chemists of all time.

Slowly shifting from a chemistry channel to a buying industrial lab equipment channel and I am thoroughly enjoying it.

“We do not build our own machines because it is cheaper, we do it because we think it will be cheaper”

So cryogenics engineer here. Couple of notes: 1. Safety: The danger in handeling cryogenic fluids lies among others in the chance for frostbite, but particular in its capability to explode or suffocate living beings. If for any reason, the "thermal integrity" is broken (i.e., loss of vacuum seal), it results in rapid vaporization of your cryogenic fluid. If it is a closed vessel, you're waiting for an explosion to happen. For this reason, it is extremely important to place pressure relieve valves/burst disks on every closed volume. Besides the explosion, suffocation is also no joke. If 100L of LN2 evaporates. it fills a room of about 5x5m with a height of 2.4m. While a O2 sensor won't help you in case of an explosion, it will warn you in case of a leak. 2. Construction: That gasket between your flange and the "dewar" is made out of TPU which is unlikely to hold cryogenic temperature. Switch that out for something like a conflat. 3. Dewar: so I'm quite certain that dewar you have is more a cryostat used for experimental physics. I.e., you load it with an experiment which you would like to perform at temperatures of your cryogenic bath (i.e., LHe or LN2 temperatures), you fill it with said cryogen and run the experiments. This I think because its a top loaded tube and its a tube. Tubes are not great at handling high pressures due to the sharp corners at the top and bottom. Dewars should be able to handle high pressures because you usually extract some cryogen by evaporating a bit of liquid which increases the pressure. This pressure increase then pushes out the cryogen through the extraction tube as seen in this video. I would very much advise against pressurizing this vessel because it is not meant for this application. 4. Liquid Helium: So you mention that you want to make LHe with this setup in the future. Be cautious that this requires significantly more energy (read up on Carnot on wiki). Furthermore it requires much better heat management because of this reduced efficiency and poses some additional risks. Besides He3 and He4, all other substances are in the solid state at 4.2K. This means that any foreign substances can clog your system, causing an enclosed volume which in turn is a safety risk. So there's probably much more to talk about, but be aware that because your setup performed safely once, it might not indefinetely. Structural failures can happen over time, i.e., metal fatigue, embrittlement, etc.

I love how many comments on this video are like "I noticed this one thing you didn't do that will probably end up killing you"

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Don't die dude. This gives off some serious Titan submarine vibes

>buy expensive cryocooler and cryocompressor >look inside >refrigeration cycle >plug into water chiller >look inside >refrigeration cycle >room kept cool with AC unit >look inside >refrigeration cycle