Efficiencies

Here you define fixed energy efficiencies and their uncertainties to consider additional effects on the overall net energy and its uncertainty.

Note: The term 'efficiency' is used to define effects on the energy yield instead of the terms "loss" or "gain". For example, a reduction of the energy yield due to grid curtailment losses of 10% needs to be defined as an efficiency of 90%.

Calculated efficiencies

The mean values of those efficiencies are calculated by WindFarmer: Analyst as part of the energy calculation, if the 'Calculate Efficiencies' checkbox was checked. The standard deviation represents the uncertainty of that mean and needs to be specified by the user. Truncation values only need to be added when efficiencies' probability distributions should be limited to a specific range.

Fixed efficiencies

A default list of efficiencies is provided. You can add and remove items from the list and define your own categories. Some general default assumptions and guidance notes are provided for efficiencies and uncertainties (specified as standard deviation) but the user should specify site-specific values.