Listar por autor UPNA "García Ruiz, Ignacio"
Mostrando ítems 1-20 de 21
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Analytical expressions for estimating sky diffuse irradiance and illuminance on tilted planes for the CIE standard general skies
This work proposes a set of analytical expressions for the calculation of the relationship between sky diffuse illuminance on a tilted plane and horizontal plane corresponding to the 15 ISO/CIE standard sky types. Given ... -
Assessment of the adequacy of EN ISO 15927-4 reference years for photovoltaic systems
The long-term performance prediction of photovoltaic systems requires representative meteorological data from a particular location. Among the numerous proposals in the field of solar energy, most of them include procedures ... -
Calculation of intercepted photosynthetically active radiation (IPAR) for traditional crops in Castilla y León, Spain
Agriculture is one of the most important economic activities in the Castilla y León region (Spain), approximately one-third of the land area is destined for this use. The role of agriculture in rural areas is essential ... -
Daylight modeling in complex environments considering the angular distribution of sky luminance
The general objective of this thesis is the modeling of daylight in complex environments, such as cities. This requires precise knowledge, both geometric and photometric, of the environment and of the sources of radiation ... -
Diffuse irradiance on tilted planes in urban environments: evaluation of models modified with sky and circumsolar view factors
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, ... -
Estimation of the solar thermal power generation potential in Pamplona (northern Spain)
In this work, an analysis of the potential of the city of Pamplona to produce solar thermal energy was carried out, according to the solar radiation received. As a result, for each residential, industrial, or service ... -
Evaluación comparativa de 19 modelos de estimación de irradiancia difusa sobre planos inclinados dependiendo del tipo de cielo estándar ISO/CIE
En este trabajo se han evaluado 19 modelos de estimación de irradiancia difusa sobre el plano inclinado, que incluyen tanto modelos isotrópicos o pseudoisotrópicos como modelos anisotrópicos. Dicha evaluación se ha llevado ... -
Evaluación de la aplicabilidad del año de referencia UNE-EN ISO 15927 ainstalaciones fotovoltaicas
(Fundación General de la Universidad Politécnica de Madrid, 2014) Contribución a congreso / Biltzarrerako ekarpenaEl desarrollo y expansión de las tecnologías de aprovechamiento de la energía solar hace necesario disponer de datos meteorológicos representativos de un determinado lugar que permitan predecir el comportamiento energético ... -
Evaluation of two procedures for selecting the CIE standard sky type using high dynamic range images
The characterization of sky conditions according to the CIE Standard General Sky classification requires knowledge of diffuse luminance angular distribution in the sky vault. This variable is usually measured by sky scanners. ... -
Generation of the site-adapted clearest-sky year of direct normal irradiance for solar concentrating technologies
Concentrating photovoltaic and thermoelectric solar facilities base their operation on collecting the direct component of solar radiation. Given that the direct beam that reaches the Earth's surface varies greatly in ... -
A GIS-based methodology for assigning experimental measurements of angular distribution of sky radiance and luminance to selected sky sectors
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 ... -
Luminance calibration of a full sky HDR imaging system using sky scanner measurements
A full sky High Dynamic Range imaging system, based on a Single-Lens Reflex camera with a fisheye lens, has been constructed and calibrated with a sky scanner luminance meter. The method considers the geometrical, spectral, ... -
Monthly intercepted photosynthetically active radiation estimation based on the Beer-Lambert's law across the cereal crops of Castilla y León (Spain)
Agriculture is by far the most important economic activity in the Spanish autonomous region of Castilla y León. Numerous factors influence crop development but one of the most related variables to the photosynthetic process ... -
Photovoltaic prediction software: evaluation with real data from Northern Spain
Prediction of energy production is crucial for the design and installation of PV plants. In this study, five free and commercial software tools to predict photovoltaic energy production are evaluated: RETScreen, Solar ... -
Proposal and evaluation of typical illuminance year (TIY) generation procedures from illuminance or irradiance data for daylight assessment in the long term
When assessing the long-term daylight availability or the performance of natural lighting systems in a given location, it is necessary to have representative data of local daylight conditions. The use of a daylight test ... -
A review of the application of near-infrared spectroscopy for the analysis of potatoes
Potato (Solanum tuberosum L.) is one of the most important crops in the world being considered as a staple food in many developing countries. The potato industry like other vegetable and fruit industries is subject to the ... -
The sky characterization according to the CIE Standard General Sky: comparative analysis of three classification methods
Since the publication of the standard sky luminance distributions (SSLD) that was consolidated in the ISO 15469:2004(E)/CIE S 011/E:2003, numerous procedures have emerged for the characterization of the sky condition ... -
Solar ultraviolet irradiance characterization under all sky conditions in Burgos, Spain
Solar Ultraviolet Radiation (UVR), which is identified as a major environmental health hazard, is responsible for a variety of photochemical reactions with direct effects on urban and aquatic ecosystems, human health, plant ... -
Temporal downscaling of test reference years: effects on the long-term evaluation of photovoltaic systems
Representative meteorological data from a given location are necessary to assess the long-term performance of photovoltaic (PV) systems. Test reference years (TRYs) or typical meteorological years (TMYs) are widely used ... -
Ultraviolet erythemal irradiance (UVER) under different sky conditions in Burgos, Spain: multilinear regression and artificial neural network models
Different strategies for modeling Global Horizontal UltraViolet Erythemal irradiance (GHUVE) based on meteorological parameters measured in Burgos (Spain) have been developed. The experimental campaign ran from September ...