García Ruiz, Ignacio

Profile Picture

Email Address

person.page.identifierURI

https://academica-e.unavarra.es/handle/2454/49106

Birth Date

Job Title

Last Name

García Ruiz

First Name

Ignacio

person.page.departamento

Ingeniería

person.page.instituteName

ISC. Institute of Smart Cities

ORCID

0000-0001-6274-8055

person.page.observainves

88813

person.page.upna

810945

Name

Filters

2020 - 20213
Reset filters

Settings

Has files: true × Subject: CIE standard sky ×

Search Results

Now showing 1 - 3 of 3
  • Thumbnail Image
    PublicationOpen Access
    Analytical expressions for estimating sky diffuse irradiance and illuminance on tilted planes for the CIE standard general skies
    (Elsevier, 2021) Torres Escribano, José Luis; García Ruiz, Ignacio; Ingeniaritza; Institute of Smart Cities - ISC; Ingeniería
    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 the parallelism in the angular distribution of sky diffuse radiance and luminance, these expressions can also be used to calculate the diffuse sky irradiance on an inclined plane. The proposed analytical expressions are obtained by adjusting the results of a numerical calculation whose methodology is described in detail in the paper. The use of these analytical expressions significantly reduces the calculation time. It is verified that the relative root-mean-square errors obtained with the analytical expressions are small compared with the use of numerical calculation, ranging from 0.03% to 4.09%, and with a tendency to increase with clear skies and high solar zenith angles.
  • Thumbnail Image
    PublicationOpen Access
    The sky characterization according to the CIE Standard General Sky: comparative analysis of three classification methods
    (Elsevier, 2020) García Ruiz, Ignacio; Blas Corral, María Ángeles de; Torres Escribano, José Luis; Ingeniaritza; Institute of Smart Cities - ISC; Ingeniería
    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 according to that standard. Precisely, the use of different procedures for the classification of the skies of a certain place according to the ISO/CIE standard can lead to obtain different frequencies of sky types. The existing uncertainties in the characterization of the sky condition according to the CIE Standard General Sky as a consequence of the classification procedure used are analyzed in this study. For this, three different classification procedures are used to characterize the sky radiance and luminance distribution measurements made by means of a sky-scanner in Pamplona (Spain) from 2007 to 2013. That is, (1) a method focused on determining the relative gradation and indicatrix functions, (2) a method based on the comparison of measured and standard luminances normalized against the horizontal diffuse illuminance, and (3) a new high-spatial-resolution approach that compares measured and standard luminances relative to zenith. In general terms, it is concluded that there is some uncertainty in the classification depending on the procedure used to characterize the sky.
  • Thumbnail Image
    PublicationOpen Access
    Daylight modeling in complex environments considering the angular distribution of sky luminance
    (2021) García Ruiz, Ignacio; Torres Escribano, José Luis; Ingeniería; Ingeniaritza
    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 or illumination. For this reason, four partial objectives have been set: 1. Modeling of irradiance and illuminance sources considering the effects of the complex environment. 2. Modeling of luminous efficacy. 3. Modeling of typical daylighting conditions. 4. Development of an imaging system for fast and high spatial resolution measurement of luminance distribution in complex environments.The research carried out in order to achieve the aforementioned partial objectives have resulted in seven articles. These papers describe in detail the theoretical basis of the issues addressed, the experimental data acquisition systems used, the quality control procedures applied, the obtained results and the conclusions, which will be summarized as a whole as the relevant contributions of this thesis.