Very interesting, I worked on turbojet engines years ago and these remind me of the way they operated by compressing (we called them compressor stages) air then expelling it out. No plants needed on your systems is what caught my eye..I just had to understand how you can do that.

I saw this on a web site:
As the impeller rotates, air is captured between each blade on the impeller and is pushed both outward and forward into the channels. The air then returns to the base of the blade. This process is repeated over and over as the impeller spins. It is this regeneration that gives the blower its pressure / vacuum capabilities. In essence, a regenerative blower operates like a staged reciprocal compressor and while each blade to blade regeneration "stage" results in only slight pressure increases, the sum total, from air entry to outlet can yield, in some makes continuous operating pressures up to 9 psig or vacuum to 14" hg with flows in the 200 to 250 scfm range at these points.

source here http://www.pneumaticsonline.com/Arti...enblowers.html