A GIS-based methodology for assigning experimental measurements of angular distribution of sky radiance and luminance to selected sky sectors
Fecha
2019Versión
Acceso abierto / Sarbide irekia
Tipo
Artículo / Artikulua
Versión
Versión aceptada / Onetsi den bertsioa
Identificador del proyecto
Impacto
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10.1016/j.renene.2018.08.095
Resumen
Mathematical models for the estimation of the angular distribution of diffuse radiance/luminance in the
sky describe the anisotropic character of diffuse solar radiation and daylight in the sky vault. In most of
these models the radiance/luminance of a sky point is determined by the product of the indicatrix
function and the gradation function. When developing and/or calibrating these models, ...
[++]
Mathematical models for the estimation of the angular distribution of diffuse radiance/luminance in the
sky describe the anisotropic character of diffuse solar radiation and daylight in the sky vault. In most of
these models the radiance/luminance of a sky point is determined by the product of the indicatrix
function and the gradation function. When developing and/or calibrating these models, it is typical to
consider separately the dispersion effects in the direction of the sun's rays and the gradation from the
zenith towards the horizon. To do this, the sky is divided into a number of concentric spherical zones
around the sun and a number of concentric spherical zones around the zenith. The intersection between
both sets of zones delimits a series of sky elements. Unfortunately, these sky elements do not correspond
to the 145 patches of sky vault recommended by the International Commission on Illumination (CIE),
which are routinely scanned by the existing commercial sky scanners. The identification of the sky elements, geometrically different from those observed by commercial sky scanners, and the assignation of
the radiance/luminance values registered by such sky scanners are not analytically trivial tasks. A GISbased methodology is presented in this work to undertake these goals. [--]
Materias
Angular distribution models,
Sky radiance/luminance,
GIS
Editor
Elsevier
Publicado en
Renewable Energy 130, (2019), 1207-1215
Departamento
Universidad Pública de Navarra. Departamento de Ingeniería /
Nafarroako Unibertsitate Publikoa. Ingeniaritza Saila /
Universidad Pública de Navarra/Nafarroako Unibertsitate Publikoa. Institute of Smart Cities - ISC
Versión del editor
Entidades Financiadoras
This work was performed in the framework of Project IRILURREFLEX (ENE2017-86974-R), financed by the Spanish State Research Agency (Agencia Estatal de Investigación, AEI) and European Regional Development Fund (Fondo Europeo de Desarrollo Regional, FEDER). They also thank the Public University of Navarre for awarding Ignacio García Ruiz a Doctoral Fellowship.