The close loop arrangement is for:
- Keep the same gas isolated and eventualy pressurise the system
- Increase the velocity of the air using only one fan, the air comes back to its inlet
- Decrease the fan Amperage once the flow gets going (mixed flow fan are at 3300 W)
- Be able to control...
I have a test application that required a high velocity (subsonic) air trough a restriction in a close loop system. I would like to know which circulating fan would be suitable (axial, centrifugal, mixed flow, turbo) since the fan will have a backpressure from the close loop arrangement...
Smallest, affordable, safe helicopter on the market: Mosquito
http://www.innovator.mosquito.net.nz/mbbs2/boxx/modules/mosquitohelicopters/contact-dealers-air.asp?dealerID=7