Ninety-eight Vestas V27 turbines in the Tehachapi area of California had a capacity factor of 25% and 24% in the years they were studied even although there were reduced winds at the time, according to a newly-released study by the Electric Power Research Institute. The 225 kW turbines on Zond's Victory Garden Phase IV, a 22 MW project, had a projected annual net energy production of 54.26 million kWh, an annual average capacity factor of 28% and 97% average wind turbine availability. EPRI analysed data from 1991 and 1992 and found that production and availability were consistent with expectations, based on several years of wind speeds from an unusually extensive meteorological data set.
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Senior Renewable Energy Analyst (WindGEMINI Product Lead) DNV GL Bristol (City Centre), City of Bristol