García Ruiz, Ignacio

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

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García Ruiz

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Ignacio

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Ingeniería

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ISC. Institute of Smart Cities

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0000-0001-6274-8055

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88813

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810945

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2020 - 20243
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Now showing 1 - 3 of 3
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    PublicationOpen Access
    Proposal and evaluation of typical illuminance year (TIY) generation procedures from illuminance or irradiance data for daylight assessment in the long term
    (Elsevier, 2020) García Ruiz, Ignacio; Blas Corral, María Ángeles de; Torres Escribano, José Luis; Ingeniaritza; Institute of Smart Cities - ISC; Ingeniería; Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa
    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 reference year (TRY) becomes a good option in these cases. This paper proposes and evaluates a procedure for the generation of a typical illuminance year (TIY) considering illuminance as the only variable for selecting the typical periods that make up the reference year. Two versions of TIY are presented, one composed of 12 typical months selected from the series of observations and another composed of 365 typical days. Each of these versions is used to obtain a global illuminance TIY (TGIY) and a diffuse illuminance TIY (TDIY) from a 27-year dataset corresponding to the Vaulx-en-Velin station (France). Furthermore, 12 luminous efficacy models have been evaluated in order to obtain a TIY from a TRY generated from irradiance data when no illuminance data are available. Thus, a global luminous efficacy model and a diffuse model are selected after benchmarking different models, considering both their original coefficients and those adjusted to local conditions. The results reveal that the monthly version of the TGIY and the daily version of the TDIY show the best overall fit to the long-term dataset. TIYs obtained from illuminance data are also observed to be statistically indistinguishable from those obtained after applying a luminous efficacy model to an irradiance-based TRY.
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    PublicationOpen Access
    Two new models of direct luminous efficacy under clear sky conditions for daylighting in Burgos, Spain
    (Elsevier, 2024-09-01) Dieste-Velasco, María Isabel; García Ruiz, Ignacio; González Peña, David; Alonso-Tristán, Cristina; Ingeniería; Ingeniaritza; Institute of Smart Cities - ISC
    The use of daylight in buildings contributes to energy savings while significantly improving visual comfort and well-being. It is therefore very important to be able to quantify illuminance to take advantage of daylight. Although several models have been proposed in recent years to determine global and diffuse illuminance, the same may not be said of direct solar illuminance, which situates this study in an area of noteworthy scientific and technological interest. Two luminous efficacy models for clear sky conditions are proposed and the results of benchmarking with previous models from the literature are presented. Data collected in Burgos (Spain) were analyzed. Specifically, eight previous models for the prediction of direct illuminance were compared with our two new models. The two new models predicted illuminance more accurately than most of the classic models. Specifically, running the models on the training data yielded Root Mean Square Error (RMSE) values of 2.58 % and 2.76 % for the first and the second model, respectively. Likewise, the test data yielded RMSE values of 3.31 % and 3.49 %, and the Mean Bias Error values with the training data were 0.06 % and 0.11 %, respectively. The models achieved high accuracy levels with both the training and the test data sets.
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    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.