What when you have a necessity for liquid nitrogen, however you don’t want to merely order it from a neighborhood provider? If that’s the case you’ll construct your very personal pulse tube cryocooler, as [Hyperspace Pirate] is within the technique of doing over at YouTube. You’ll be able to catch phase 1 the usage of a linear motor and phase 2 the usage of a reciprocating piston-based model additionally after the wreck. Despite the fact that nonetheless very a lot a work-in-progress, the second one model of the cryocooler controlled to cut back the temperature to a cold -75°C.
The heartbeat tube cryocooler is one of the sorts of methods used for making a cooling impact. Commercially to be had fridges and freezers generally tend to make use of Rankine cycle coolers because of their low price and effectiveness at (fairly) hotter temperatures. For cryogenic temperatures, Stirling engines are often used, even though they in finding some use in refrigeration as smartly. All 3 proportion not unusual parts, however they fluctuate of their potency over a bigger temperature vary.
On this video sequence, the viewer is taken in the course of the physics in the back of those coolers and the bottlenecks which stop them from merely cooling all the way down to 0 Kelvin. In spite of the misleading simplicity of pulse tube cryocoolers — with only a unmarried piston, a regenerator mesh, and a few tubing — making them paintings smartly is an workout in persistence. We’re without a doubt taking a look ahead to the long run movies on this sequence because it develops.