There are a pair of varied turbines [geographically separated] that are a different 'spin' from the horizontal axis propellers commonly seen.
I'll hope for photo weather, and add them to this post soon.
I'd describe each as turbine, [vice propeller], one is vertical, one is horizontal. Vertical example is something like that leading this thread.
Horizontal version has vanes or 'scoops' that introduce airflow to entire 180 degrees windward, then push backside of fins, while free to rotate about it's post to seek and align with incoming breeze.
If possible, contact with engineers of those buildings might relate the performance of the units...