Best practices for turbine specs

Generic

Turbine type

This is the name for your turbine type. Throughout the simulation setup, this name will serve as the reference for selecting your specific turbine model.

Reference density

Enter the manufacturer's reference density. Power curves are adjusted in-simulation to the current site conditions.

Reference Turbulence Intensity

If available, enter the manufacturer's reference turbulence intensity to enhance the accuracy; if not, a default value of 0.08 is recommended.

The manufacturer of the turbine provides the power curve based on specified reference turbulence intensity (Ti) and reference air density. In Whiffle LES, the power curve is adjusted according to actual atmospheric conditions, using the reference Ti and reference air density. Incorrect references can lead to a shift in the power curve, causing a bias in recorded power output. This bias, depicted in the figure below, can be positive or negative depending on whether the references are over or under specified. The magnitude of the bias can vary by several percentage points depending on the accuracy of the references.

Power & Thrust

Reference wind speed [m/s]

Please ensure that all values are unique and arranged in ascending order.

Power [kW]

Ensure that the power specification includes at least one value below the rated power indicated in the previous step.