This is doable, and it's done in the natural gas turbine world (look up combined cycle turbine, essentially you hook up a lower-power steam turbine to the exhau

This is doable, and it's done in the natural gas turbine world (look up combined cycle turbine, essentially you hook up a lower-power steam turbine to the exhaust of a natural gas turbine). The main problem is that turbines are expensive and lossy, and when the main turbine is already going off of a relatively small amount of wind energy, the amount of energy you could produce from its' output is probably very small.