2.5MW wind turbine with ducted fan system design

[JaredJames]

If the fan provides 750kW of energy, even if we ignore the resistance, the wind turbine could only produce 750kW of energy (that would be 100% efficient and that is not possible). Why can you not grasp this?

 

[BigApple2625]

Modern technology and mechanical improvments are available now that weren't around before. computer vs abacus