I'm interested in channeling air into an underground condenser to generate water. Which of these approaches would be most appropriate, and is there a better approach I haven't considered?
A: A wind-powered turbine, which mechanically drives a fan. I would most likely use a HAWT, with a gear to change the spin direction from horizontal to vertical. HAWTs seem to be the most efficient tested wind power system, although there are pure-vertical alternatives, which would eliminate some moving parts. However, the efficiency claims I've read refer to electricity-generation, where shaft work is the desired output, rather than air flow.
B: A funnel-type intake that faces into the wind, or is omni-directional. It would channel air downwards into the system without moving parts, other than its wind-orientation. This seems like it would avoid efficiency losses in A caused by converting moving air to shaft work, then back to moving air. However, the wind may be largely diverted around the intake, since it would act as a blockage.
C: Use a static airfoil, or other surface to direct air into the system, without acting as a blockage.