Question

Wind power plants are required to have a large rotor size for large power output due to???​

Answer 1

Explanation:

low power density of air stream

Answer 2

Wind power plants are required to have a large rotor size for large power output due to increase in surface area.

Explanation:

• The rotor diameter of a typical turbine with a 600 kW electrical generator will be around 44 metres (144 ft.).
• When you double the rotor diameter, you obtain a four-fold increase in surface area (two squared).
• This also implies that the rotor produces four times the amount of electricity. To turn at all, a larger generator, of course, needs greater power (i.e. strong winds).
• So, if you build a wind turbine in a low-wind location, you'll get the most output out of it by employing a tiny generator for a given rotor size or for given generator larger rotor size.