2 Oct
2022
2 Oct
'22
2:38 p.m.
Check out this link for a detailed description of the "Stirling Cycle" in
particular the YouTube video at the bottom of the article is very well done
and shows a small machine in operation:
https://www.stirlingcryogenics.eu/en/the-stirling-cycle
Tom
On Sun, Oct 2, 2022 at 1:41 AM Paul Koning <paulkoning(a)comcast.net> wrote:
On Sep 30, 2022, at 11:19 PM, Tom Hunter
<ccth6600(a)gmail.com> wrote:
https://www.stirlingcryogenics.eu/
These machines are still made and indeed are very cool. ;-)
So to speak!
I didn't see their liquid helium machine. I remember one installed at the
TU Eindhoven physics department; it consisted of a pair of two-stage
Stirling machines (which by themselves will liquify hydrogen or neon, i.e.,
they go down to about 20 K) plus a bunch of auxiliary equipment. The whole
setup took maybe a 15 foot square room.
The website doesn't show any of the compact machines I remember seeing
described. A bunch of those had 400 Hz power, indicating they were meant
for airborne use. One was a little lab bench machine, a box perhaps the
size of an old style desktop PC, lying flat, with a "cold finger" sticking
out of the box.
paul