Making liquid nitrogen from scratch (an absurd amount)

Summary by Krater

The creator attempts to build a DIY liquid nitrogen generator from scratch using a second-hand cryocooler, a used nitrogen generator tube, and a dewar, ultimately successfully producing liquid nitrogen at a rate of 0.58 liters per hour.

From the video

Answers: How do you build a DIY liquid nitrogen generator?

• Liquid nitrogen generator building
• Gifford-McMahon cryocooler operation
• Membrane nitrogen generation
• Cryocooler compressor setup
• Liquid nitrogen condensation testing

What it concludes

• A used Sumitomo RDK-408L3 cryocooler can successfully reach temperatures cold enough to liquefy air and nitrogen.
• A makeshift liquid nitrogen generator built from used and surplus parts can produce approximately 0.58 liters of liquid nitrogen per hour.
• The DIY liquid nitrogen generator achieved a production rate of about 14 liters per day, coming close to commercial systems.
• The vacuum-insulated dewar successfully held vacuum pressure and stored liquid nitrogen without boiling off immediately.