Curiosity of Wind Efficiency

An engineer who is also an environmental activist sought to pursue better renewable and clean sources for the sake of achieving his aim. However, before he does so, he needs to know the required number of wind turbines to ensure that the city still receives the same amount of energy.

A conventional power station generates about $8.5MW$ of electrical power to illuminate the bustling city. Given that the wind turbines have an efficiency of $45$ %, what would be the minimum number of wind turbines required to replace a single power station?

Details :

1. You may want to refer to the previous question in the set, Beauty of the natural wind #MajesticWind for the calculated power of the wind.

2. Assume that the efficiency of the conventional power station is $100$ %.