The Amazing Vortex Tube!

 

Fancy getting air down to -40ºC without spending a fortune? AND on the other side, hot air, up to 60ºC ?


Then how about getting that from a Gizmo anyone, and I mean ANYONE, can build, with no moving parts, built with plumbing material and a few bits and bobs you can find anywere?

It works... On regular Compressed Air, nothing fancy, you just run it from your Spray Paint Compressor!

Image above taken from the Wikipedia, THIS IMAGE IS THEIRS, not mine.

http://en.wikipedia.org/wiki/Vortex_tube

The explanation for it, you just click on the above link, as you can see on the Wikipedia image above,  compressed air coming in from the top tube swirls around, and hot air comes out toi the right, while the old air goes out the left tube.

Another web page, http://www.visi.com/~darus/hilsch/#fig237

goes on to show the spiral chamber, (not shown on Wikipedia), and also that the hot air tube is 32 times as long as the inner tube's diameter. 

So I came up with this, image below, where you make a Spiral Chamber out of a Brass piece, the spiral is simple enough, a 2 point Spiral, a smaller Hemi-circle, then a larger one, from one of the small one's endpoints.

More on that later, just see what's needed here:

A plumbing material store's T tube fitting where a tube goes in, but not all the way, so the Spiral chamber has it's air intake hole still inside the T fitting, without obstruction.

One side of the chamber is bevelled fits partially inside the hot air tube tube, while the other side will  press the Diaphragm, (a water fosset rubber valve), against the cold air tube.

If the air only gets in the Spiral Camber trough the intake hole, there's no leakage, and the set's all aligned, you'll get...

A 10$ version of the commercial 100$ Vortex Tubes!

Now to the Photos: 

There it is, a Spiral Chamber, a Dremmel worked Brass Washing, and as the note says "Beveled", it means square-beveled to almost the tube's inner diameter, so as to plug, snugly and not loose, into the tube.

I found an expedient way to achieve that is to put the brass washing on a Tube Cutter, image below,


but the piece isn't CUT by the tool's circular blade, it rests on top of the blade, and rolls freely, and  then you fix it  under the working area of a Maxicraft/Dremmel/whatever Drill Stand.

 

 

Here's the Plumbing pieces, I've used 2 tube sizes, one, larger, for the T Fitting, the other, smaller, for the actual tube. 

This way, with size adapters, you have the tube going into a pressurized chamber(the Fitting's interior), and the air getting into the Spiral chamber's hole and out the 2 tubes.

Notice to the left the Spiral Chamber already fitted into the tube, then you glue the Rubber valve onto the said Chamber, and squeeze it  against the other tube. 

 

You can see it above, the Chamber, the Rubber valve, and some duct tape I added to the tube with the Chamber plugged in.

You see, the tube "floats" inside the T Fitting, so the compressed air enters OK.

The final marvel, to the right side I added a smaller T Fitting, with a
conic piece of metal or a faucet to regulate the hot air supply, do it as you like...