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DIALNET OAI Articles (611.005 recursos)

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Tecnologías

Mostrando recursos 1 - 20 de 18.432

  1. Potencial fotovoltaico en techumbre de edificios industriales de alta demanda energética, en zonas ecuatoriales.

    Marín López, Diego Sebastian; Zalamea, Esteban Felipe; Barragán Escandón, Antonio
    Industrial and residential buildings account for 60% of greenhouse gas emissions worldwide, and more specifically, they consume 62% of the electricity in Cuenca, Ecuador. The sun provides equatorial Andean countries with a consistent and relatively stable energy source throughout the year. Industrial plants have suitable surface areas on which to install solar photovoltaic (PV) panels. Using a volumetric survey of a high-consumption industrial plant, a roof intervention is proposed to achieve maximum usage of crystalline silicon solar panels. Aspects of indoor ventilation and natural lighting are also considered. Through a BIM (Building Information Modelling) software model and simulations using SAM@,...

  2. Nivel de eficiencia del usuario (neu) vs. consumo eléctrico en 14 edificios residenciales en altura en San Juan, Argentina.

    Alonso Frank, Alción; Kuchen, Ernesto
    The residential building sector accounts for 44% of local electricity consumption and is the user responsible for this consumption, especially through the use of energy-intensive systems such as individual air-conditioning systems. This work is based on the hypothesis that their behaviour, in relation to the use of passive or active adaptation strategies to satisfy their condition of comfort, has an impact on building energy efficiency. The objective is to know the correlation between the User Efficiency Level (UEL index) and the Energy Consumption of the building. For this purpose, fieldwork is carried out in 14 residential buildings located in San...

  3. Aspectos cuantitativos y cualitativos de la luz solar en recintos urbanos de alta densidad edilicia en climas soleados (período invernal)

    Córica, Lorena; Ruiz, María Angélica
    The city of Mendoza, located in the central-western region of the Argentine Republic, has a semi-arid climate and therefore high levels of solar radiation throughout the year. However, these effects are mitigated by the building density and foliation periods of urban trees. Hence, the objective of this research was to carry out a qualitative and quantitative study of daylight conditions during winter. Natural light was examined through two cases that are characteristic of the city, using a combination of in situ measurement techniques and subjective assessments of the spaces by users. The results on visual comfort in outdoor spaces show...

  4. Caracterización y diagnóstico de metodologías internacionales y normas iram para la evaluación ambiental edilicia de la vivienda: Análisis dirigido a la contextualización regional para zonas áridas de Argentina.

    Alvarez, Analia Alejandra; Buigues Nollens, Arturo F.
    This article has as aims determine the feasibility of contextualization of Environmental Assessment Methodologies (MEAs) of greater relevance at the international level that are applicable to the assessment of housing, compared to the current development of the Argentine IRAM regulations on sustainability. To do this, BREEAM, LEED, CASBEE and VERDE are analyzed on the one hand, and on the other, contextualized MEAs developed in Jordan and Korea. The theoretical study of the aforementioned MEAs is used as a research technique, through which these tools are characterized and diagnosed. As a result, we obtain the operational framework in which their developments...

  5. Reflectancia de las envolventes verticales y su influencia sobre disponibilidad de luz natural en el cañón urbano de la ciudad de Concepción

    Venegas, Andrés; Piderit Moreno, María Beatriz
    The objective of this study is to evaluate the influence a vertical envelope ́s material has on the availability of natural light in urban settings representative of the city of Concepción, in order to know the potential of these materials to provide natural light. The methodology was based on the selection of case studies from the historic Concepción downtown to build simplified models according to their height/width ratio (H/W). In each case, façade materials with greater presence in the urban canyon were chosen to calculate their reflectance and use in the simulated settings. The results show that the availability of...

  6. Efecto de la ventilación natural en el consumo energético de un edificio bioclimático. Análisis y estudio mediante energy plus

    Mercado, María Victoria; Barea Paci, Gustavo Javier; Esteves, Alfredo; Filippín, Celina
    Passive cooling through natural ventilation has a great potential for single-family homes and temperate continents such as the city of Mendoza, located in the central west of the Argentine Republic. This strategy seeks to end the risks of overheating and reduces the energy consumption of mechanical conditioning equipment. This study aims to evaluate the influence on energy consumption, in two ventilation scenarios (day and night) for two constructive resolutions (light and mass). For this, a computational model of a single-family house, modeled and adjusted in the Energy Plus v8.6 program was used. For the ventilation model, “Airflow Network” (AIRNET algorithm)...

  7. Módulos elásticos equivalentes para predicción de deformaciones en articulaciones

    Marinelli, Franco; Weiss, Brenda; Berli, Marcelo E.; Di Paolo, José
    En el estudio de la mecánica de contacto de las articulaciones humanas, la deformación de las superficies en contacto es fundamental porque posibilita un canal por el que fluye el lubricante reduciendo el desgaste. Para determinar la validez de las predicciones de los desplazamientos de estas superficies a partir de distintos métodos, estos se aplican al estudio del contacto seco y estático de articulaciones de rodilla y de cadera, sanas y protésicas. Aplicando una carga hertziana, se evaluaron tres módulos elásticos equivalentes en un modelo simplificado de columna: el correspondiente a un sólido de pequeño espesor, el correspondiente a un...

  8. Predicción de la reducción del impacto térmico en un edificio con doble pared

    Berli, Marcelo Eduardo; Brondino, Agustín; Di Paolo, José
    At Santa Fe de la Vera Cruz city, Argentina, a building that includes elements of sustainable architecture, energy efficiency and comfort based on the use of natural resources is built. Particularly, a double facade design on the front walls is meant to achieve an air chamber that prevents heat transfer from the outside to the inside in summer and vice versa in winter. In This work, a numerical study is presented for the evaluation of the thermal performance of a cavity (air chamber) interposed in a double facade of the building for different climatic conditions, considering two air chambers alternatives: connected...

  9. Sistema de acceso usando una tarjeta RFiD y verificación de rostro

    Vega Luna, José Ignacio; Sánchez Rangel, Francisco Javier; Salgado Guzmán, Gerardo; Lagos Acosta, Mario Alberto
    En este trabajo se presenta el desarrollo de un prototipo de sistema de acceso a un centro de datos usando como identificación una tarjeta de radio frecuencia o RFiD y verificación del rostro del usuario. El sistema se compone de tres módulos de entrada y un módulo central. El objetivo fue diseñar un sistema para transmitir, desde cada módulo de entrada al módulo central, el identificador único universal de la tarjeta RFiD o UUID y la imagen del rostro del usuario para consultar en una base de datos MySQL y en un directorio de fotografías si el usuario puede acceder...

  10. Estudio técnico del uso de energía solar y biogás en vehículos eléctricos en Ilhabela-Brasil

    Pereira Micena, Raul; Llerena P., Omar R.; de Queiróz Lamas, Wendell; Silveira, José Luz
    Actualmente, los sistemas híbridos de generación de energía se han mostrado como una excelente oportunidad para la generación de electricidad. En este trabajo se presenta el estudio de uno de estos sistemas considerando dos fuentes de energía disponibles (solar -- biogás) en la isla Ilhabela en el estado de San Pablo -- Brasil, con miras a dotar de energía a vehículos eléctricos. Este estudio se basa primeramente en el cálculo de la demanda de energía de los vehículos eléctricos en esta isla. Luego se determina la capacidad de producción de biogás en Ilhabela. Posteriormente se efectúa un análisis energético de...

  11. Métodos multicriterio aplicados en la selección de un material para discos de freno

    Martínez Gómez, Javier; Chérrez Troya, Mario; Llanes Cedeño, Edilberto Antonio; Peralta Zurita, Diana
    The selection of material for an automotive com-ponent is a complex process, because it involves an exploration of the main criteria according to the properties required by the component to be designed. The use of multi-criteria methods (MCDM) allows the development of a fast and efficient selection methodology, based on the analysis of the properties and the optimization indexes of the criteria to assign importance to each alternative in the selection of the best option for the manufacture of a brake disc. This study uses five candidate materials for the desired application. The MCDM methods used are multidisc-ciplinary optimization and...

  12. Consumo sustentable de agua en viviendas de la ciudad de Cuenca

    Ortiz, Jessica Mariela; Molina Castro, Eduardo Xavier; Quesada Molina, Juan Felipe; Calle Pesántez, Andrea Estefanía; Orellana Valdez, Diana
    El presente estudio propone y sustenta la aplicación de cuatro criterios para la gestión sustentable de agua potable al interior de la vivienda en la ciudad de Cuenca, Ecuador. Los criterios determinados son el control del consumo de agua, el control de fugas, el uso de dispositivos ahorradores y los sistemas de reutilización de agua. Se definen tres niveles de valoración para cada criterio: estándar, mejores prácticas y superiores prácticas. Para el desarrollo de la investigación se aplican encuestas a la población que permiten sondear la existencia y la predisposición de incorporar prácticas de ahorro de agua potable en las...

  13. Detección de peatones en la noche usando Faster R-CNN e imágenes infrarrojas

    Galarza Bravo, Michelle Alejandra; Flores, Marco
    In this paper we present a system for pedestrian detection at nighttime conditions for vehicular safety applications. For this purpose, we analyze the Faster R-CNN performance for infrared images. So that we note that Faster R-CNN has problems to detect small scale pedestrians. For this reason, we present a new Faster R-CNN architecture focused on multi-scale detection, through two ROI’s generators for large size and small size pedestrians, RPNCD and RPNLD respectively. This architecture has been compared with the best Faster R-CNN baseline models, VGG-16 and Resnet 101, which present the best results. The experimental results have been development on...

  14. Estudio cinemático y dinámico del sistema de suspensión de un monoplaza de competencia eléctrico Formula Student

    Arévalo Melgar, Christian Geovnny; Medina, Ayrton; Valladolid, Juan
    The level of competitiveness generated by the Formula Student, has generated a series of studies and technological advances in order to improve the performance of the single seaters so that they develop successfully in the aspect of the demands of the competition. This document details the study of the suspension system of a Formula Student electric competition single seater. This study involves an analysis of the kinematics and dynamics of the suspension system in which an analytical determination of movement, loads and vibrations is carried out by means of simulation software and mathematical calculations. The aim of the study is...

  15. Implementación de un algoritmo para la detección de señales de tránsito del Ecuador: Pare, Ceda el paso y Velocidad

    Flores Calero, Marco Javier; Conlago, Cristian; Yunda, Jhonny; Aldás Sánchez, Milton Rodrigo; Flores Vázquez, Carlos Alberto
    This paper presents a prototype for a traffic sign detection system (TSDS) on-board a moving vehicle. Therefore, a new approach to the development of an TSDS is presented, using the following innovations: i) an efficient method of color segmentation for the generation of regions of interest (ROIs) based on k-NN with Km-means , ii) a new version of the HOG descriptor for feature extraction and iii) SVM training for stage multi-classification. The proposed approach has been specialized and tested on a subset of regulatory Ecuadorian signs (Stop, Give-way and Speed). Many experiments have been carried out in real driving conditions,...

  16. Diseño de una red neuronal para la predicción del coeficiente de pérdidas primarias en régimen de flujo turbulento

    Solórzano Castillo, Byron Agustin; Moreno Moreno, José Andrés; Castillo Calderón, Jairo Dario
    La presente investigación está orientada al diseño de una red neuronal para la predicción del factor de fricción en régimen de flujo turbulento, siendo este indispensable para el cálculo de pérdidas primarias en conductos cerrados o tuberías. Se utiliza Neural Networks Toolbox de MATLAB® para diseñar la red neuronal artificial (RNA), con retropropagación, cuya base de datos comprende 724 puntos obtenidos del diagrama de Moody. Las variables de entrada de la RNA son el número de Reynolds y la rugosidad relativa de la tubería; la variable de salida es el coeficiente de fricción. Utilizando el algoritmo de entrenamiento de Levenberg-Marquardt...

  17. Determinación de las áreas de transferencia de calor en un reactor tambor rotatorio

    Benítez Cortés, Isnel; García Rodríguez, Agustín; Ramos Sánchez, Luis Beltrán; Prieto Montenegro, Fernando
    This work presents a methodology to obtain the heat transfer areas of a rotary drum reactor in the presence of baffles therein are determined. Different solids flow are evaluated between 3.4 and 7.6 g / s, and two rotational speeds, and 14,7 and 11.6 mpr. Since imaging of the rotary drum reactor profile, a mathematical procedure to study the influence of these variables on the value of gas transfer areas and solid-wall heat-wall is proposed. The results show that, in the case of solid contact - wall, increasing the inflow of solids to the reactor, the angle increases, there is...

  18. Analisis de la implementacion de un parque fotovoltaico en la Universidad Central de las Villas

    Gallego Landera, Yandi; Arias García, Rodolfo Manuel; Sosa Plasencia, Roberto; Casas Fernández, Leonardo
    Renewable energy sources are the alternative of the future because their environmental impact is minimal compared to the current energies. The photovoltaic sector is now at the forefront of renewable energies. This work will analyze in more detail the feasibility of the location in the Central University "Marta Abreu" of Las Villas (UCLV) of a photovoltaic solar park of 1 MW; which will generate in a year, which will save the country on money, fuel, CO2 emissions to the atmosphere and the alternative for the future of photovoltaic solar energy in Cuba: the solar tracking system. Also analyzed are the...

  19. Sistema de calentamiento por inducción aplicado a la cocción

    Rodríguez Domínguez, Yandry; Gutiérrez Menéndez, Armando Manuel; Fernández Correa, Alexander
    In the present work the design and implementation of a half bridge inverter is realized, so that it is used in applications of heating by electromagnetic induction. The control stage of the power converter is based on a general purpose PIC microcontroller. We study the physical principles of electromagnetic induction and the characteristics of the materials used for these purposes. The method used in vessel identification and electric charge modeling is explained. A block diagram of power and control is proposed to achieve induction heating in ferromagnetic containers. A program is presented in MATLAB to be used as a user...

  20. Evaluación de los riesgos del proceso de generación de energía en una central termoeléctrica

    Carter Carrión, Rafael; Rabassa Olazabal, Glenia; Prieto Montenegro, Fernando; Benítez Cortés, Isnel
    This work was developed in the Central Electric 10 of Octubre, Nuevitas; in order to assess the risks affecting the power factor available. From a historical series of reports faults for 11 months, in each of the threads generation, risk levels and the priority number of these were determined and a quantitative assessment of the potential effect of each risk it was held at the available power factor. The results show that at central, the main risks obtained were concentrated in the leaks in the economizers, the failure load and vibration up in turbines, which are presented in the three...

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