Читать книгу Wind Power Basics - Dan Chiras - Страница 31

To understand how important it is to mount a wind turbine on a tall tower, consider a simple mathematical equation. It’s called the power equation and is used to calculate the power available from the wind. This equation shows us that three factors influence the output of a wind energy system: (1) air density, (2) swept area, and (3) wind speed — all explained shortly.

The power equation is: P = ½ d x A x V³.

P stands for the power available in the wind (not the power a wind generator will extract — that’s influenced by efficiency and other factors). Density of the air is d. Swept area is A. Wind speed is V.