pvlib.clearsky.simplified_solis

pvlib.clearsky.simplified_solis(apparent_elevation, aod700=0.1, precipitable_water=1.0, pressure=101325.0, dni_extra=1364.0)

Calculate the clear sky GHI, DNI, and DHI according to the simplified Solis model [R21].

Reference [R21] describes the accuracy of the model as being 15, 20, and 18 W/m^2 for the beam, global, and diffuse components. Reference [R22] provides comparisons with other clear sky models.

Parameters:

apparent_elevation: numeric

The apparent elevation of the sun above the horizon (deg).

aod700: numeric

The aerosol optical depth at 700 nm (unitless). Algorithm derived for values between 0 and 0.45.

precipitable_water: numeric

The precipitable water of the atmosphere (cm). Algorithm derived for values between 0.2 and 10 cm. Values less than 0.2 will be assumed to be equal to 0.2.

pressure: numeric

The atmospheric pressure (Pascals). Algorithm derived for altitudes between sea level and 7000 m, or 101325 and 41000 Pascals.

dni_extra: numeric

Extraterrestrial irradiance. The units of dni_extra determine the units of the output.

Returns:

clearsky : DataFrame (if Series input) or OrderedDict of arrays

DataFrame/OrderedDict contains the columns/keys 'dhi', 'dni', 'ghi'.

References

[R21]

(1, 2, 3) P. Ineichen, “A broadband simplified version of the Solis clear sky model,” Solar Energy, 82, 758-762 (2008).

[R22]

(1, 2) P. Ineichen, “Validation of models that estimate the clear sky global and beam solar irradiance,” Solar Energy, 132, 332-344 (2016).