>Our friend James Hartman posted this URL back in 1997 showing how you
>can build one of these for yourself in the 'Centripete' form...possibly
>a peltier junction cooling device would keep the water chilled as it was
>spun around so you could leave it on a countertop or a desk;
> http://www.bahnhof.se/~grappo/metaphysics/Centripete.html
FWIW, this looks to me to be very similar to a Ranque-Hilsch
vortex tube, turned upside down and using water instead of
compressed air.
If it works in anything like the same way it should be possible to
get a temperature differential between the two outlets, as well.
Cheers all,
Alan