Diffuse irradiance on tilted planes in urban environments: evaluation of models modified with sky and circumsolar view factors
| Autor: | Marian de Blas, C. Sáenz, J.L. Torres, B. Hernández, Ignacio López García |
|---|---|
| Přispěvatelé: | Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa. ISC - Institute of Smart Cities, Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa. InaMat - Institute for Advanced Materials, Universidad Pública de Navarra. Departamento de Ingeniería, Universidad Pública de Navarra. Departamento de Ciencias, Nafarroako Unibertsitate Publikoa. Ingeniaritza Saila, Nafarroako Unibertsitate Publikoa. Zientziak Saila |
| Rok vydání: | 2021 |
| Předmět: |
Canyon
Diffuse solar irradiance geography Scanner geography.geographical_feature_category Renewable Energy Sustainability and the Environment Plane (geometry) media_common.quotation_subject Tilted planes Irradiance Urban canyon Urban environments View factor Diffuse irradiance Angular distribution Sky Geology media_common Remote sensing |
| Zdroj: | Academica-e. Repositorio Institucional de la Universidad Pública de Navarra instname |
| ISSN: | 2017-8697 |
| Popis: | Numerous studies have analyzed existing irradiance models for estimating sky diffuse irradiance on tilted planes. However, few have evaluated the suitability of these models for estimating irradiance in obstructed environments, specifically considering the effects of obstacles. In this study, three irradiance models —one of them with five variants— for estimating diffuse irradiance on tilted planes located in urban environments were evaluated. All models have been adapted to consider the effect of an urban canyon on the diffuse irradiance received on a tilted plane through the sky view factor and the circumsolar view factor. All the models were evaluated against the diffuse irradiance values obtained by the ISO 15469:2004(E)/CIE S 011/E:2003 angular distribution model. Therefore, it was necessary to determine the standard sky type corresponding to each record of the measurements performed by a sky scanner at the radiometric station of UPNA (Spain). A total of 4,864 scenarios were considered to occur from the combination of different orientations and inclinations of the plane, and different orientations and aspect ratios of the urban canyon. The results revealed that the Perez model considering a 35° half-angle circumsolar region has the best performance, followed by the Perez model considering a 45° half-angle circumsolar region. This work was performed in the framework of the IRILURREFLEX project (ENE2017-86974-R), financed by the Spanish State Research Agency (Agencia Estatal de Investigación, AEI) and the European Regional Development Fund (Fondo Europeo de Desarrollo Regional, FEDER). |
| Databáze: | OpenAIRE |
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