Wind turbines with 80 m diameter rotors will be ideally spaced at distances of
10×80 m = 800 m downwind and 3×80 m = 240 m crosswind. Thus each turbine, which produces an average of 650 kWe, will require a land area of
This gives a generating capacity of
At 10% land usage this will provide a national average of
If each person requires an average of 1.5 kW then each km2 can supply
The following geographical information is obtained from the web for the relevant countries
The population density Spain and Denmark are well within the wind energy capabilities.
Germany is borderline and India's population density exceeds the limits.