pvl_klucher1979

Determine sky diffuse irradiance on a tilted surface using Klucher's 1979 model.

Contents

Syntax

SkyDiffuse = pvl_klucher1979(SurfTilt, SurfAz, DHI, GHI, SunZen, SunAz)

Description

Klucher's 1979 model determines the sky diffuse irradiance on a tilted surface using the surface tilt angle, surface azimuth angle, diffuse horizontal irradiance, direct normal irradiance, global horizontal irradiance, extraterrestrial irradiance, sun zenith angle, and sun azimuth angle.

Inputs

Outputs

Example

SurfTilt = 30;
SurfAz = 180;
DHI = 47;
%DNI = 969;
GHI = 473;
%HExtra = pvl_extraradiation(60);
SunZen = 60;
SunAz = 161;
pvl_klucher1979(SurfTilt, SurfAz, DHI, GHI, SunZen, SunAz)
ans =

   64.9622

References

[1] Loutzenhiser P.G. et al., 2007. Empirical validation of models to compute solar irradiance on inclined surfaces for building energy simulation, Solar Energy vol. 81. pp. 254-267.

[2] Klucher, T.M., 1979. Evaluation of models to predict insolation on tilted surfaces. Solar Energy 23 (2), 111–114.

See Also

pvl_perez, pvl_reindl1990, pvl_kingdiffuse, pvl_haydavies1980, pvl_grounddiffuse, pvl_ephemeris

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