How does a Vortex Tube make cold and hot air?
A. Fluid (air) that rotates around an axis (like a tornado), is called a vortex. A Vortex Tube creates cold air and hot air by forcing a simple heat exchange. Compressed air enters a chamber in the Tube and is forced to spin in a tight, high speed circular path(1,000,000 RPM). A percentage of the high speed air exits as hot air out the hot exhaust of the Tube, but the remainder of the (now slower) air stream is forced to counterflow back up through the center of the high speed air stream-giving up heat-and exiting as cold air.
