I meant use the direct mechanical energy.. not generating electricity... (my uses would be SUPER “micro”)but I still may be way off base.
...but I am interested.
The answers are theoretically the same because the turbine harnesses power which we then convert to either electricity with a generator or to moving water with a pump.
Looks like the blades on this are 5" diameter. Calculation of the power in the wind at 20kph (about 12.5mph) for a 5" turbine gives a theoretical power of 59 watts. Efficiency of the turbine reduces that. A really good turbine coefficient would be about .3 or .4 so at 20kph wind speed we might be able to get 17 W of power.
Then attach a pump to that windmill. The pump is also not 100% efficient so you may be able to convert half of that 17W to move water. If my calculations are correct 8 Watts is about enough to lift a bucketful of water 1m every 2 minutes.
So, if you have a constant stiff wind blowing you may be able to light up a small, energy efficient light globe or pump a small amount of water a small distance.
I found a small pressure pump that draws about 30W so that windmill is going to need a very strong wind to run even the smallest pressure pump.