TITLE:
Distribution of Solar Irradiance on Inclined Surfaces Due to the Plane of the Ground
AUTHORS:
Teolan Tomson, Henrik Voll
KEYWORDS:
Solar Irradiance, Hanging Down Façade, Ground Influence
JOURNAL NAME:
Journal of Power and Energy Engineering,
Vol.2 No.7,
July
11,
2014
ABSTRACT: Measurements of
solar radiation are ordinarily made on horizontal planes recording global, diffuse
and reflected components. The beam component and distribution of the global
radiation on tilted planes can be calculated via the said components, as the
position of the Sun in the sky’s sphere is known. Another ordinary procedure is
measuring beam and diffuse components and calculating global radiation. These
measurements require stationary equipment and in such a way it is difficult to
study the influence of different grounds on the distribution of radiation on the
inclined surfaces due to the ground. This distribution has some importance in
civil engineering, but it is not popular in the field of solar radiation
investigations. Present paper shows how this distribution can be calculated
measuring only global irradiance on the horizontal and vertical planes. Such an
approach, which is valid in clear-sky and overcast conditions, allows the use
of a portable measuring device and studies of different grounds. The
coincidence of the calculated values with the actual is good, except for
snow-cover and discrete cloud, which do not correspond to the isotropic sky and
ground models.