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Ranque-Hilsch Vortex Cooling Tube

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churchjw

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#1
I saw a cold air gun at a tool show some time back being used to cool plastic chips during cutting. I finally cot around to looking into these things and found a few DIY sites for them. The best one I found was http://ottobelden.blogspot.com/2010/12/another-home-made-ranque-hilsch-vortex.html

So over the Easter break I decided to build one to see how it went and surprise it worked.

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I didn't do pictures during the build since I had no idea if it would work. But I followed the layout from the website so you can see whats inside for there. The shop today was 72 F measured by my multimeter.

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The cold end measured at 11 degrees F. I got it down to 7 degrees at one point.

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The hot end was 97 degrees F and got up to 104 degrees. I have a large compressor and this puts a load on it. About the same as a cool mist system does. I tried the cold gun on the mill and cut some lexan at high rpm. I saw a marked chip improvement while running the cold air.

I think the guy underestimated the cost. All total from Lowes it was about $30.00. I had some of the parts but that was the real cost.

Kind of a cool project. Has anyone else used or made one of these?

Jeff

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pdentrem

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#2
I use one at work from time to time, for cooling on the lathe when working on parts that are hot glued to a face plate. Was always curious on how it worked.
Thanks for the posting.
 

KBeitz

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#3
I bought two real ones for $0.25. They spin the air molecules and separate
the hot one from the cold ones. Cold ones are heaver so the hot ones get spun
to the outside.
 

Bob Korves

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#4
It creates a miniature tornado vortex inside the tube. As the air gets compressed in the vortex, it heats up. The other end of the vortex gets cold (conservation of energy). It also makes plenty of noise while doing so.
https://en.wikipedia.org/wiki/Vortex_tube
 

KBeitz

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#5
I have no sound from mine other than the sound of an air gun.
It sure does us up some air...
 
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