Examinando por Autor "Rus-Casas, Catalina"
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Ítem Analysis of Different Scenarios to Include PV Rooftop Systems with Battery Energy Storage Systems in Olive Mills(MDPI, 2023-12-27) Sánchez-Jiménez, Jose Luis; Muñoz-Rodríguez, Francisco José; Jiménez-Castillo, Gabino; Martinez-Calahorro, Antonio Javier; Rus-Casas, CatalinaThe industrial sector is not the one with the highest energy consumption but, together with, it represents the most, together with the transport sector, the most polluting ones. Photovoltaic Rooftop systems and battery energy storage systems are very strong candidates to include renewable energy, allowing greater grid autonomy and greenhouse gas mitigation. Therefore, this paper aims to outline it will be provided a methodology based on monitored data to analyze the potential of photovoltaic Rooftops with battery energy storage systems regarding self-consumption and self-sufficiency indices in the industrial sector. Direct self-consumption and self-sufficiency indices, either with or without storage, will be analyzed. In addition, the iso self-consumption and iso self-sufficiency curves are used, which allow us to evaluate the matching between the generation and consumption profiles considering either direct self-consumption or the use of batteries. In this sense, a large, medium, and small olive mill were selected in order to cover the entire spectrum of these industries. Olive mills are suitable candidates for the incorporation of photovoltaic systems since generation profiles match the consumption profiles. However, the size of these systems is highly dependent on the period of consumption to be faced. Regarding batteries, both during the harvest and off-harvest periods, the impact on self-sufficiency becomes significant, reaching increases of up to 10%, depending on the battery capacity used.Ítem Assessment of Single-Axis Solar Tracking System Efficiency in Equatorial Regions: A Case Study of Manta, Ecuador(MDPI, 2024-08-09) Ponce-Jara, Marcos A.; Pazmino, Ivan; Moreira-Espinoza, Ángelo; Gunsha-Morales, Alfonso; Rus-Casas, CatalinaEcuador is grappling with a severe energy crisis, marked by frequent power outages. A recent study explored solar energy efficiency in the coastal city of Manta using an IoT real-time monitoring system to compare static photovoltaic (PV) systems with two single-axis solar tracking systems: one based on astronomical programming and the other using light-dependent resistor (LDR) sensors. Results showed that both tracking systems outperformed the static PV system, with net gains of 31.8% and 37.0%, respectively. The astronomical-programming-based system had a slight edge, operating its stepper motor intermittently for two minutes per hour, while the LDR system required continuous motor energization. The single-axis tracker using astronomical programming demonstrated notable advantages in energy efficiency and complexity, making it suitable for equatorial regions like Manta. The study also suggested potential further gains by adjusting solar positioning at shorter intervals, such as every 15 or 30 min. These findings enhance our understanding of solar tracking performance in equatorial environments, offering valuable insights for optimizing solar energy systems in regions with high solar radiation. By emphasizing customized solar tracking mechanisms, this research presents promising solutions to Ecuador’s energy crisis and advances sustainable energy practices.Ítem CACESOL: Characterization of photovoltaic solar cells and modules. Experimental measurement of the V-I curves(Journal Science IES, 2016-06-27) Amate-Marchal, M.; Castro-Valderas, J.; Bueno-Rodríguez, R.; Pérez-Jiménez, F. J.; Gómez-Macías, A.; Medina-Rincón, A.; Aguilar-Peña, Juan Domingo; Rus-Casas, Catalina; Muñoz-Rodríguez, Francisco JoséLa obtención y translación a condiciones estándar de medida (CEM) de las curvas características V-I tomadas a sol real de una célula y módulo fotovoltaico, probablemente sea una de las prácticas imprescindibles en cualquier trabajo de investigación relacionado con la tecnología fotovoltaica. Este trabajo trata de obtener los distintos parámetros de las curvas de funcionamiento de la célula y módulo fotovoltaico, para diferentes condiciones de iluminación (irradiancia), pasar a valores en condiciones estándar de medida y comparar con las proporcionadas en las hojas de características por el fabricantede dispositivos fotovoltaicos (FV). Se demuestra la dependencia de la corriente con la irradiancia recibida sobre la célula solar. Nuestro estudio se realizó en el laboratorio (indoor) y en condiciones a sol real (outdoor) con un mini módulo de silicio monocristalino (CS20M20 de 2,36v, 1.21A, 2.2Wp), y módulo de silicio policristalino (Shell RSM 100S de 100Wp). Los parámetros a medir son: la temperatura de la célula (Tc), temperatura ambiente (Ta), irradiancia (G), la corriente en cortocircuito (ISC), tensión en circuito abierto (VOC). Para la obtención de la curva VI en interior se utilizaron distintos valores de resistencias eléctricas para la medida de la tensión en extremos del módulo y la corriente del circuito. La instrumentación utilizada para la medida de los distintos parámetros fue, termómetro de temperatura de superficie y temperatura ambiente, voltímetro DC, pinza amperimétrica y medidor de irradiancia. Una vez realizadas las distintas medidas, se han hecho los cálculos necesarios para mostrar el comportamiento de los módulos ensayados.Ítem Modelling of Electric Power Generation Plant Based on Gas Turbines with Agricultural Biomass Fuel(MDPI, 2023-04-24) Rico-Riveros, Luis Fernando; Trujillo-Rodríguez, César Leonardo; Díaz-Aldana, Nelson Leonardo; Rus-Casas, CatalinaTo ensure the survival of society, an enormous amount of energy is required to sustain the economic and social development of communities. In addition, there is a pressing need to achieve significant reductions in climate change and the associated costs of implementing systems based on traditional energy sources, as well as addressing the issue of providing electricity to isolated areas. In rural environments, there is an alternative energy source with enormous potential, agricultural biomass, which can produce electrical and thermal energy and can progressively help to reduce dependence on fossil fuels. The purpose of this work is to present a dynamic simulation model of a power generation plant that uses the Joule Brayton thermodynamic cycle, based on a gas turbine which is fueled by residual agricultural biomass; the cycle converts mechanical energy to electrical energy. The problem is approached through the characterization of the biomass, mathematical models of the plant components, and simulation of the system behavior in different scenarios. The simulations are processed in Matlab/Simulink, which allows the model to be verified, validating the equilibrium relationship between generation and load demand.Ítem Objetos de aprendizaje multimedia en asignaturas de grado en ingeniería: Videocast, Screencast(XVII Congreso Internacional EDUTEC, 2014-11-12) Aguilar-Peña, Juan Domingo; Rus-Casas, Catalina; Peña-Hita, María de los ÁngelesEn esta comunicación presentamos varios videopodcasts elaborados en la Escuela Politécnica Superior de la Universidad de Jaén, dentro de proyectos de innovación docente (videos didácticos, sobre temas específicos concretos, tanto de teoría como de prácticas, grabaciones de clase on line, grabaciones de seminarios con Adobe Connect, screencast sobre algunos programas informáticos…) que servirán como complemento para asignaturas del Grado en Ingeniería Electrónica Industrial, que se imparten en la Universidad de Jaén. La idea es contribuir a la incorporación de una nueva cultura docente que suponga cambios metodológicos, el desarrollo de competencias y la introducción de las TIC, de acuerdo con las directrices del EEES, potenciando el trabajo autónomo del alumno y ayudando a la comprensión de algunos conceptos relacionados con la electrónica. Se comenta la importancia de este recurso didáctico, el videocast, en la docencia universitaria y, a su vez el proceso y materiales necesarios para su elaboración.Ítem Optimizing Energy Management and Sizing of Photovoltaic Batteries for a Household in Granada, Spain: A Novel Approach Considering Time Resolution(MDPI, 2024-10-11) Rus-Casas, Catalina; Gilabert-Torres, Carlos; Fernández-Carrasco, Juan IgnacioAs residential adoption of renewable energy sources increases, optimizing rooftop photovoltaic systems (RTPVs) with Battery Energy Storage Systems (BESSs) is key for enhancing self-sufficiency and reducing dependence on the grid. This study introduces a novel methodology for sizing Home Energy Management Systems (HEMS), with the objective of minimizing the cost of imported energy while accounting for battery degradation. The battery model integrated nonlinear degradation effects and was evaluated in a real case study, considering different temporal data resolutions and various energy management strategies. For BESS capacities ranging from 1 to 5 kWh, the economic analysis demonstrated cost-effectiveness, with a Net Present Value (NPV) ranging from 54.53 € to 181.40 € and discounted payback periods (DPBs) between 6 and 10 years. The proposed HEMS extended battery lifespan by 22.47% and improved profitability by 21.29% compared to the current HEMS when applied to a 10 kWh BESS. Sensitivity analysis indicated that using a 5 min resolution could reduce NPV by up to 184.68% and increase DPB by up to 43.12% compared to a 60 min resolution for batteries between 1 and 5 kWh. This underscores the critical impact of temporal resolution on BESS sizing and highlights the need to balance accuracy with computational efficiency.Ítem Recursos que fomentan un entorno personal de aprendizaje (PLE)(Magisterio (https://www.magisterio.com.co/), 2016-04) Aguilar-Peña, Juan Domingo; Rus-Casas, Catalina; Jiménez-Torres, Miriam; Muñoz-Rodríguez, Francisco JoséEl presente artículo presenta una serie de recursos educativos desarrollados en el marco de distintas convocatorias de proyectos de innovación docente. Ellos contribuyen a una nueva estrategia docente centrada en la innovación, el desarrollo de competencias y la introducción efectiva de las TIC en la Educación Superior; además, potencian el trabajo autónomo del estudiante y el cómo debe aprender a lo largo de sus estudios. Se expone cómo se aumentan las posibilidades formativas, en los estudiantes de ingeniería, con la creación de un “Entorno Personal de Aprendizaje” basado en los recursos educativos.Ítem Robust Nonsingular Terminal Sliding Mode Control of a Buck Converter Feeding a Constant Power Load(MDPI, 2023-02-01) Louassaa, Khalil; Aissa, Chouder; Rus-Casas, CatalinaIn recent years, DC microgrid systems feeding constant power loads (CPLs) have been given a particular focus due to their effect on the overall system stability caused by their electrical characteristics behaving as negative incremental impedance. To address this issue, this paper investigates the stabilization of a DC bus voltage in a DC microgrid (MG) feeding a CPL. The output voltage of the main DC bus is stabilized by using a robust nonsingular terminal sliding mode controller that is characterized by the elimination of the singularity problem that arises from the conventional terminal sliding mode controller. The CPL is emulated by a boost converter where its output voltage is tightly regulated. The system is investigated in terms of voltage following and disturbance rejection. The robustness and effectiveness of the proposed control strategy are assessed against input voltage fluctuations and power demand variations. The proposed controller is validated through simulations and an experimental setup.Ítem Rooftop photovoltaic systems. New parameters for the performance analysis from monitored data based on IEC 61724(Elsevier, 2023-06-13) Muñoz-Rodríguez, Francisco Jose; Snytko, Anastasiia; de la Casa Hernandez, Jesús; Rus-Casas, Catalina; Jiménez-Castillo, GabinoRooftops Photovoltaic systems present a feasible choice to mitigate the adverse effects of electricity costs and climate crisis. Different parameters have been defined to analyse this type of systems from monitored data. However, they only focus on the matching capability between the load and AC generation profiles together with the utility grid usage. Therefore, they do not consider the performance of the PV generator and the rest of components of the photovoltaic system. Moreover, although IEC-61724 standard defines common criteria to assess the performance of photovoltaic systems, this standard does not consider calculated parameters and yields adapted to the idiosyncrasy of Rooftops Photovoltaic systems. Thus, in this paper it will be provided new calculated parameters and yields (i.e. a self-consumption yield and a to grid yield) and performance ratios (i.e. self-consumption Performance Ratio together with a to grid Performance Ratio) which combine selfconsumption with system performance providing a proper analysis from monitored data. Moreover, they may facilitate comparisons between installations with different array power. These new parameters may not only help to ensure that design objectives have been achieved but they may better assess the potential of this technology which are key issues for the deployment of this type of facilities.