EridanMan wrote:

Has anyone ever attempted to install a Hilsch Tube (Vortex Tube) in an
aircraft for environmental controls?

I built one of them in High school as a science fair project. it
worked, but was noisy as hell. Usually, vortex tubes are used for spot
cooling, due to their low efficiency. One big enough to cool a typical
aircraft cabin would be quite large, and as I said, NOISY!

Steve