Homemade liquid nitrogen generator Joule Thomson throttle (2013)

[mkaic]

The YouTube channel Hyperspace Pirate[0] has been consistently uploading fantastic videos documenting their attempts to make their own homemade liquid nitrogen machine. They don't shy away from including all the technical details, and throw in plenty of hilarious deadpan humor too. Highly recommend them if you're interested in this topic.

[0]https://www.youtube.com/@HyperspacePirate

[tonetegeatinst]

Yep. Been watching for a while.

I really want affordable dip and dots at home, and to do some cryogenic experiments that are only possible using liquid nitrogen or liquid helium.

Also those Dewar's arnt cheap, nor are the pumps

[asdfman123]

Seconded, it's one of my favorite YouTube channels. He's very thorough and the format is entertaining.

[dang]

Related:

Homemade Liquid Nitrogen Generator - https://news.ycombinator.com/item?id=23828316 - July 2020 (67 comments)

[eig]

I fabricobbled a liquid nitrogen generator using a cryocooler at home using the same design as Ben at Applied Science [0]. It works very well, I've used it to make liquid nitrogen ice cream many times. It's just slow so I run it overnight.

Applied Science is fantastic channel if you haven't seen it. He's also on HN.

OP's design is much more impressive and hard to build than using a Stirling cryocooler like I did.

[0] - https://www.youtube.com/watch?v=7PWESWqhD8s

[nullc]

I wonder if in the time since this was written if anyone has found a good source for small turbo expanders.

Liquefied air is a potentially interesting mode of energy storage for islanded solar because it doesn't require high pressure storage (which has safety concerns)-- for that application the round trip efficiency isn't critical as there is nothing else to do with the power... but it can't be a total joke. And the basic JT cycle is really poor. I understand that simply adding an expander and another heat exchange stage can improve it a lot.

[sandworm101]

If you are dealing with liquid nitrogen from air, then you are probably also dealing with liquid oxygen in the mix. I imaging that at power-storage scales the presence of such amounts of liquid oxygen might create safety issues. Separating it out might nullify any energy storage advantages.

[thsksbd]

kids, be sure not to have your cigarette lit whilst separating N2 from air.

[cm2187]

I love how he used that to try to freeze his cat!

[marcosdumay]

The cat was (mildly) amused!

[jvanderbot]

Are those adds from my/our ISP? How does he, someone who seems to write html somewhat poorly, manage to get so many intrusive ads into this post?

[avmich]

The overall quality of this website I'd estimate at least in top 5% of all Web, if not top 1%. The content is superb, the presentation is quite clear.

[DistractionRect]

It's an http page, so your ISP//any hop along the way is free to insert anything they want or completely rewrite the content as they wish.

[NotYourLawyer]

I turned off my adblocker and I see two inline ads, nothing crazy. Not sure what you’re seeing, but I’m quite sure you should install an adblocker.