# Power Calculator

### Result

 Producer Alstom Type ECO122 2700 Capacity 2'700 kW Rotor diameter 122 m Power Production 6'471'249 kWh/year Capacity factor1 27.3% Full load hours2 2'395 h/year Operating hours3 7'364 h/year ### Wind speed distribution

Either you can estimate the Weibull distrubtion for your site with the Weibull calculator or the power calculator approximates a distribution for the mean wind speed that is entered.

Weibull parameters      m/s
mean wind speed      m/s

### Air Density

You can calculate the air density for your site with the air density calculator.

kg/m³

### Power curve

Choose a turbine type from the list or choose "user-defined power curve" and enter your own power curve in the table.

 1 m/s kW 2 m/s kW 3 m/s kW 4 m/s kW 5 m/s kW 6 m/s kW 7 m/s kW 8 m/s kW 9 m/s kW 10 m/s kW 11 m/s kW 12 m/s kW 13 m/s kW 14 m/s kW 15 m/s kW 16 m/s kW 17 m/s kW 18 m/s kW 19 m/s kW 20 m/s kW 21 m/s kW 22 m/s kW 23 m/s kW 24 m/s kW 25 m/s kW 26 m/s kW 27 m/s kW 28 m/s kW 29 m/s kW 30 m/s kW

## Explanations for the power calculator

With the power calculator you can estimate the power production for a site for different turbine types. A turbine availabiliy of 100% is assumed (no losses due to down time, icing, transformer losses, park effects etc.). No guarantees can be given for the obtained results.

1 The capacity factor is the ratio between the annual production and the maximum technically possible production of a wind turbine. It should be noted that wind turbines are not principally designed for an optimal capacity factor, but to generate as much electricity as possible at certain wind speed. Capacity factors of 30-40% are considered very high for coastal areas.

2 The full load hours represent the capacity factor. It is the theoretical number of hours that the wind turbine has to run at full load in order to produce the annual yield (= capacity factor * number of hours in a year [8'760]).

3 Operating hours are the expected number of hours a year the wind turbine produces electricity. A year totals 8'760 hours.