pvlib.temperature.GenericLinearModel.use_sapm#
- GenericLinearModel.use_sapm(a, b, wind_fit_low=1.4, wind_fit_high=5.4)[source]#
Use the SAPM model parameters to set the generic_model equivalents.
In the SAPM the heat transfer coefficient increases exponentially with windspeed, whereas in the other models the increase is linear. This function equates the generic linear model to SAPM at two specified winds speeds, thereby defining a linear approximation for the exponential behavior.
- Parameters
a (float) – See
pvlib.temperature.sapm_module()for details.b (float) – See
pvlib.temperature.sapm_module()for details.wind_fit_low (float, optional) – First wind speed value at which the generic linear model must be equal to the SAPM model. [m/s]
wind_fit_high (float, optional) – Second wind speed value at which the generic linear model must be equal to the SAPM model. [m/s]
Notes
The two default wind speed values are based on measurements at 10 m height. Both the SAPM model and the conversion functions can work with wind speed data at different heights as long as the same height is used consistently throughout.