Teacher :What device can store the wind power generated energy?
Kimura :The wind power generated energy should be stored in windmill itself, I think.
Teacher : Why? ...Kimura san, The wind has died down!Then what device...?
Kimura :Cut off the coupling between the windmill and generator
and set the pitch angle of blades to zero.
Then the windmill can store the momental energy as a large flywheel!.
Teacher :Kimura may persist to interrupt my lesson....!
