Power coefficient measurement on a 12 kW straight bladed vertical axis wind turbine

A 12 kW vertical axis H-rotor type wind turbine has been designed and constructed at Uppsala University. A measurement campaign has been performed to collect data to calculate the power coefficient using the method of bins. The measurement was performed at different constant rotational speeds on the turbine during varying wind speeds to observe the power coefficients dependence on tip speed ratio. The power coefficient peaked at 0.29 for a tip speed ratio equal to 3.3.

► 12 kW H-rotor type wind turbine, passive stall regulation, PM-generator. ► Experimental measurement of power coefficient as function of tip speed ratio. ► Using international standard IEC 61400-12-1. ► Maximum power coefficient is 0.29 at tip speed ratio 3.3.