pvlib.irradiance.king

pvlib.irradiance.king(surface_tilt, dhi, ghi, solar_zenith)

Determine diffuse irradiance from the sky on a tilted surface using the King model.

King’s model determines the diffuse irradiance from the sky (ground reflected irradiance is not included in this algorithm) on a tilted surface using the surface tilt angle, diffuse horizontal irradiance, global horizontal irradiance, and sun zenith angle. Note that this model is not well documented and has not been published in any fashion (as of January 2012).

Parameters:

• surface_tilt (numeric) – Panel tilt from the horizontal. See surface_tilt. [°]

• dhi (numeric) – Diffuse horizontal irradiance. See dhi. [Wm⁻²]

• ghi (numeric) – Global horizontal irradiance. See ghi. [Wm⁻²]

• solar_zenith (numeric) – Solar apparent (refraction-corrected) zenith angles. [°]

Returns:

poa_sky_diffuse (numeric) – The diffuse component of the solar radiation.