Swept area

The Hannevind 15kW Wind Turbine has a blade diameter of 10.00 metres. This means it has a swept area, or capture area of 78.54 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.

Hannevind 15kW Wind Turbine power output curve

The graph below shows the power produced (in watts) for the Hannevind 15kW Wind Turbine 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 Hannevind 15kW Wind Turbine is extracting 2200 Watts of power from the wind, which is an efficiency of 36.44%.

How efficient is the Hannevind 15kW Wind Turbine?

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 Hannevind 15kW Wind Turbine turbine, working out annual power production is more complex.

Read more about the Power Predictor

The price quoted was 39,000 Euros (£35,100 at 0.9 GBP to 1 Euro), which includes installation, but prices are dependent on currency fluctuations and where the consumer is in relation to the turbine. i.e. more expensive if over 50 meters away.

10.00 metres

15000

400 Volt

Hannevind

Sweden

Permanent magnet

9

Dynamic brake