Swept area

The G-3120 has a blade diameter of 19.20 metres. This means it has a swept area, or capture area of 289.53 square metres. This is all important when comparing wind turbines, since it directly relates to the amount of passing wind energy the turbine blades can intercept.

G-3120 power output curve

The graph below shows the power produced (in watts) for the G-3120 at different wind speeds, based on data supplied by the manufacturer.

The green line shows the actual output that the wind turbine achieves at the given wind speed, according to the manufacturers.The dashed line in the graph shows the theoretical maximum energy that this turbine could extract from the wind, according to Betz's Law (59.3%). At a typical wind speed of 5 m/s, the G-3120 is extracting 7500 Watts of power from the wind, which is an efficiency of 33.7%.

How efficient is the G-3120?

Wind turbines can only convert some of the energy in the wind into electricity. The graph here shows how efficient the turbine is across the range of wind speeds you might get.

The orange line in the above graph shows the efficiency ranging from 0 to 1. The grey line is the previously mentioned maximum efficiency - The Betz Limit. If this limit is exceeded, the manufacturer's claims are not to be trusted!

While these graphs give an indication of the instantaneous power and efficiencies you might expect from the G-3120 turbine, working out annual power production is more complex.

Read more about the Power Predictor

19.20 metres

35000

Turbine and controls for five years.

240 Volt AC

Endurance Wind Power

Inaudible at 200 metres

USA

Induction

11

Disc brake