Recursos de colección

Archivo Digital UPM (106.784 recursos)

This is an institutional repository providing access to the research output of the institution. Primarily contains thesis.

Materia = Energía Eléctrica

Mostrando recursos 1 - 20 de 183

  1. Viabilidad de una planta de biomasa forestal para la producción de energía eléctrica

    Alonso Aguado, Antonio
    Este Proyecto estudia la implantación de una central termoeléctrica para la generación de energía en la provincia de Orense. Se trata de una instalación que hace uso de biomasa forestal con el fin de producir energía eléctrica renovable de una manera responsable. En primer lugar se estudia en profundidad la disponibilidad de la biomasa presente en la región que dará lugar al emplazamiento de la instalación, en pos de una posterior toma de decisión acerca del correcto dimensionamiento de la planta, así como la ubicación óptima de la misma. Se ha logrado dar una alternativa a la dependencia energética a...

  2. Energía fotovoltaica: Trazador de curvas V-1 para seguimiento de módulos solares

    García de la Cruz, Pablo
    Definición, construcción y puesta en marcha de un trazador de Curvas I-V en placas fotovoltaicas con fines docentes, comparándolo con otros métodos de medida. Para lo cual se han realizado diferentes ensayos: Barrido de Curva V-I módulo KC50 Barrido de Curva V-I módulo KC85GX-2P Barrido de Curva V-I con sombreado de células Barrido de Curva V-I con conexión en serie y en paralelo Barrido de Curva V-I sin diodos “by-pass” Barrido de Curva V-I con conexión en serie y en paralelo sin diodos “by-pass” Abstract Definition, construction and startup of a tracer IV curves in photovoltaic panels for teaching purposes,...

  3. Pre-diseño de una instalación mixta fotovoltaica-térmica para una vivienda

    Gaspar Novillo, Gonzalo
    El objetivo del presente proyecto es realizar el pre-diseño de una instalación solar mixta fotovoltaica-térmica para satisfacer la demanda eléctrica para iluminación y para parte de las necesidades de energía térmica para agua caliente de una vivienda. El proyecto define las condiciones técnicas de la instalación a partir de la radiación solar registrada en la localización elegida. Además de incluir el estudio económico y los planos correspondientes que indican la viabilidad del mismo. Como puntos a destacar en el proyecto, se puede tomar los datos obtenidos de generación eléctrica y térmica, la viabilidad técnica y económica y el análisis de...

  4. New method for analytical photovoltaic parameter extraction

    Cubas Cano, Javier; Pindado Carrion, Santiago; Farrahi, Assal
    Correct modeling of the equivalent circuits regarding solar cell and panels is today an essential tool for power optimization. However, the parameter extraction of those circuits is still a quite difficult task that normally requires both experimental data and calculation procedures, generally not available to the normal user. This paper presents a new analytical method that easily calculates the equivalent circuit parameters from the data that manufacturers usually provide. The analytical approximation is based on a new methodology, since methods developed until now to obtain the aforementioned equivalent circuit parameters from manufacturer's data have always been numerical or heuristic. Results...

  5. Explicit expressions for solar panel equivalent circuit parameters based on analytical formulation and the Lambert W - Function

    Cubas Cano, Javier; Pindado Carrion, Santiago; Manuel Navío, Carlos de
    Due to the high dependence of photovoltaic energy efficiency on environmental conditions (temperature, irradiation...), it is quite important to perform some analysis focusing on the characteristics of photovoltaic devices in order to optimize energy production, even for small-scale users. The use of equivalent circuits is the preferred option to analyze solar cells/panels performance. However, the aforementioned small-scale users rarely have the equipment or expertise to perform large testing/calculation campaigns, the only information available for them being the manufacturer datasheet. The solution to this problem is the development of new and simple methods to define equivalent circuits able to reproduce the...

  6. A cyber-physical approach to combined HW-SW monitoring for improving energy efficiency in data centers

    Pagán Ortiz, Josué; Zapater Sancho, Marina; Cubo, Oscar; Arroba García, Patricia; Martín Ayuso, Vicente; Moya Fernández, José Manuel
    High-Performance Computing, Cloud computing and next-generation applications such e-Health or Smart Cities have dramatically increased the computational demand of Data Centers. The huge energy consumption, increasing levels of CO2 and the economic costs of these facilities represent a challenge for industry and researchers alike. Recent research trends propose the usage of holistic optimization techniques to jointly minimize Data Center computational and cooling costs from a multilevel perspective. This paper presents an analysis on the parameters needed to integrate the Data Center in a holistic optimization framework and leverages the usage of Cyber-Physical systems to gather workload, server and environmental data...

  7. Leakage and temperature aware server control for improving energy efficiency in data centers

    Zapater Sancho, Marina; Ayala Rodrigo, José Luis; Moya Fernández, José Manuel; Vaidyanathan, Kalyan; Gross, Kenny; Coskun, Ayse K.
    Reducing the energy consumption for computation and cooling in servers is a major challenge considering the data center energy costs today. To ensure energy-efficient operation of servers in data centers, the relationship among computa- tional power, temperature, leakage, and cooling power needs to be analyzed. By means of an innovative setup that enables monitoring and controlling the computing and cooling power consumption separately on a commercial enterprise server, this paper studies temperature-leakage-energy tradeoffs, obtaining an empirical model for the leakage component. Using this model, we design a controller that continuously seeks and settles at the optimal fan speed to minimize...

  8. On the leakage-power modeling for optimal server operation

    Arroba García, Patricia; Zapater Sancho, Marina; Ayala, José L.; Moya Fernández, José Manuel; Olcoz, Katzalin; Hermida, Román
    Leakage power consumption is a com- ponent of the total power consumption in data cen- ters that is not traditionally considered in the set- point temperature of the room. However, the effect of this power component, increased with temperature, can determine the savings associated with the careful management of the cooling system, as well as the re- liability of the system. The work presented in this paper detects the need of addressing leakage power in order to achieve substantial savings in the energy consumption of servers. In particular, our work shows that, by a careful detection and management of two...

  9. Middleware architectures for the Smart Grid : survey and challenges in the foreseeable future

    Martínez Ortega, José Fernán; Rodríguez Molina, Jesús; Castillejo Parrilla, Pedro; Diego Martínez, Rubén de
    The traditional power grid is just a one-way supplier that gets no feedback data about the energy delivered, what tariffs could be the most suitable ones for customers, the shifting daily needs of electricity in a facility, etc. Therefore, it is only natural that efforts are being invested in improving power grid behavior and turning it into a Smart Grid. However, to this end, several components have to be either upgraded or created from scratch. Among the new components required, middleware appears as a critical one, for it will abstract all the diversity of the used devices for power transmission...

  10. Explicit Expressions for Solar Panel Equivalent Circuit Parameters Based on Analytical Formulation and the Lambert W-Function

    Cubas Cano, Javier; Pindado Carrion, Santiago; Manuel Navío, Carlos de
    Due to the high dependence of photovoltaic energy efficiency on environmental conditions (temperature, irradiation...), it is quite important to perform some analysis focusing on the characteristics of photovoltaic devices in order to optimize energy production, even for small-scale users. The use of equivalent circuits is the preferred option to analyze solar cells/panels performance. However, the aforementioned small-scale users rarely have the equipment or expertise to perform large testing/calculation campaigns, the only information available for them being the manufacturer datasheet. The solution to this problem is the development of new and simple methods to define equivalent circuits able to reproduce the...

  11. Mapping energy efficiency barriers

    Martín Rubio, Irene; Florence Sandoval, Antonio; Gonzalez Sanchez, Elena
    In the E2KW Conference we present the research we are following in collaboration with ANESE (Asociación de Empresas de Servicios Energéticos) to check the interaction among barriers that previous studies have identified. We focus our research question in the information problems that include a number of specific problems such as lack of information, asymmetric information and the well-documented principle-agent problem. Asymmetric information problems occur when one party involved in a transaction has more information that the other, which may lead to suboptimal energy decisions. The fact that energy efficiency cannot be observed (ie. it is ?invisible?) further intensifies this asymmetric...

  12. El papel de la hidroelectricidad en el contexto de las energías renovables en España

    Wilhelmi Ayza, José-Román
    En el artículo se discute el papel de la energía hidroeléctrica en el marco del sistema eléctrico español, donde existe una elevada penetración de energías no gestionables con una tendencia clara a aumentar en los próximos años. El desarrollo de nuevas centrales hidroeléctricas se basará probablemente en centrales reversibles. La energía hidroeléctrica es una tecnología madura y eficiente para el almacenamiento de energía a gran escala y contribuye por tanto de manera decisiva a la integración de fuentes renovables no gestionables. Los beneficios obtenidos con la operación punta-valle pueden ser insuficientes para compensar el coste de una nueva central. Sin embargo, los ingresos obtenidos pueden incrementarse sustancialmente mediante su participación...

  13. GeoProcesamiento integrado con ArcObjects para generar afecciones por infraestructuras eléctricas de alta tensión.

    Gutierrez Corea, Federico Vladimir; Manso Callejo, Miguel Ángel; Moreno Marimbaldo, Francisco Javier
    El presente trabajo muestra el caso de estudio de las afecciones y la Relaciones de Bienes y Derechos (RBD) afectados por nuevas infraestructuras eléctricas de transporte (obras lineales) en España. El reto consiste en ayudar al cumplimiento de los objetivos de la planificación, definida por el MITYC (revisada para 2020), para construir nuevos circuitos y subestaciones. Se ha desarrollado un Software con ArcObjects que integra/automatiza las distintas etapas del flujo de trabajo asociado: (a) Codificación de parcelas, (b) GeoProcesamiento de afecciones, (c) Generación de Informe de parcelas afectadas y propietarios, (d) Almacenamiento y publicación en internet de las afecciones mediante...

  14. A comparative study of Monte Carlo-coupled depletion codes applied to a Sodium Fast Reactor design loaded with minor actinides

    Ochoa Valero, Raquel; Vázquez Antolín, Miriam; Álvarez Velarde, F.; Martín Fuertes, Francisco; García Herranz, Nuria; Cuervo Gómez, Diana
    inor actinides (MAs) transmutation is a main design objective of advanced nuclear systems such as generation IV Sodium Fast Reactors (SFRs). In advanced fuel cycles, MA contents in final high level waste packages are main contributors to short term heat production as well as to long-term radiotoxicity. Therefore, MA transmutation would have an impact on repository designs and would reduce the environment burden of nuclear energy. In order to predict such consequences Monte Carlo (MC) transport codes are used in reactor design tasks and they are important complements and references for routinely used deterministic computational tools. In this paper two...

  15. Analysis of a Spanish energy scenario with Generation IV nuclear reactors

    Ochoa Valero, Raquel; Jiménez Varas, Gonzalo; Perez Martin, Sara
    The advantages of fast-spectrum reactors consist not only of an efficient use of fuel through the breeding of fissile material and the use of natural or depleted uranium, but also of the potential reduction of the amount of actinides such as americium and neptunium contained in the irradiated fuel. The first aspect means a guaranteed future nuclear fuel supply. The second fact is key for high-level radioactive waste management, because these elements are the main responsible for the radioactivity of the irradiated fuel in the long term. The present study aims to analyze the hypothetical deployment of a Gen-IV Sodium...

  16. Validation of a CFD wake model based on the actuator disk technique and the thrust coefficient. Preliminary results

    Cabezón Martínez, Daniel; Sanz Rodrigo, Javier; Martí Pérez, Ignacio; Crespo Martínez, Antonio
    A simplified CFD wake model based on the actuator-disk concept is used to simulate the wind turbine, represented by an actuator disk upon which a distribution of forces, defined as axial momentum sources, are applied on the incoming flow. The rotor is supposed to be uniformly loaded, with the exerted forces as a function of the incident wind speed, the thrust coefficient and the rotor diameter. The model is validated through experimental measurements downwind of a wind turbine in terms of wind speed deficit. Validation on turbulence intensity will also be made in the near future.

  17. CFD modelling of the interaction between the Surface Boundary Layer and rotor wake. Comparison of results obtained with different turbulence models and mesh strategies

    Cabezón Martínez, Daniel; Sanz Rodrigo, Javier; Martí Pérez, Ignacio; Crespo Martínez, Antonio
    A simplified CFD wake model based on the actuator disk concept is used to simulate the wind turbine, represented by a disk upon which a distribution of forces, defined as axial momentum sources, are applied on the incoming non-uniform flow. The rotor is supposed to be uniformly loaded, with the exerted forces function of the incident wind speed, the thrust coefficient and the rotor diameter. The model is tested under different parameterizations of turbulence models and validated through experimental measurements downwind of a wind turbine in terms of wind speed deficit and turbulence intensity.

  18. Análisis del funcionamiento de un generador fotovoltaico de silicio cristalino de 7 kW tras 16 años de operación en Madrid

    Moreton Villagra, Rodrigo; Lorenzo Pigueiras, Eduardo; Zilles, Roberto; Gómez Rodríguez, Trinidad; Martínez de Olcoz Pena, Ainhoa
    Este artículo presenta la degradación observada en un generador de x-Si 7 kW de potencia tras 16 años de exposición en la terraza del Instituto de Energía Solar de la Universidad Politécnica de Madrid. La caída de la potencia pico ha sido del 9% durante dicho periodo o, lo que es equivalente, una degradación anual del 0,56%; mientras que la desviación típica se ha mantenido básicamente constante. Los principales defectos visuales observados han sido delaminaciones en la superficie PET/PVF de la cara posterior de los módulos y roturas en las cajas de conexión y en la unión entre marco y...

  19. Modelling wake effects using two CFD techniques

    Cabezón Martínez, Daniel; Ferrer, E.
    Comparativa de dos técnica de simulación de rotor: BEM (Blade Element Momentum) y MRF (Moving Reference Frame) para el perfil S809 de NREL

  20. Sensitivity analysis on turbulence models for the ABL in complex terrain

    Cabezón Martínez, Daniel; Sanz Rodrigo, Javier; Van Beeck, J.
    Análisis de sensibilidad de modelos de turbulencia para un modelo CFD de viento aplicados a un emplazamiento en terreno complejo. Validación con datos de viento y turbulencia registrados a 3 alturas en 3 torres de medida.

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