pvl_haydavies1980

Determine diffuse irradiance from the sky on a tilted surface using Hay & Davies' 1980 model.

Contents

Syntax

SkyDiffuse = pvl_haydavies1980(SurfTilt, SurfAz, DHI, DNI, HExtra, SunZen, SunAz)

Description

Hay and Davies' 1980 model determines the sky diffuse irradiance on a tilted surface using the surface tilt angle, surface azimuth angle, diffuse horizontal irradiance, direct normal 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_haydavies1980(SurfTilt, SurfAz, DHI, DNI, HExtra, SunZen, SunAz)
ans =

   68.4462

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] Hay, J.E., Davies, J.A., 1980. Calculations of the solar radiation incident on an inclined surface. In: Hay, J.E., Won, T.K. (Eds.), Proc. of First Canadian Solar Radiation Data Workshop, 59. Ministry of Supply and Services, Canada.

See Also

pvl_perez, pvl_reindl1990, pvl_kingdiffuse, pvl_klucher1979, pvl_grounddiffuse, pvl_ephemeris

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