Energía y Ambiente (ITBA-KIT)
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Browsing Energía y Ambiente (ITBA-KIT) by Subject "ALMACENAMIENTO DE ENERGIA"
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tesis de maestría.listelement.badge Development of a cell formation system(2017) Kull, Tobías; Hiller, Marc; Baena, Manuel"The aim of this work was to develop a cell formation system for cycling and formation of lithium ion cells. The uniqueness of this system is the possibility of energy recuperation from the discharg-ing process of the cell. Therefore, the hardware of an existing prototype was revised, and the cor-responding firmware was developed. For the safe operation of the cell formation system, a battery management system was designed, and a high-level system control was realized in MATLAB. Together with an intermediate electrical storage, a cell formation unit for the formation and cycling of a lithium ion cell was commissioned. Subsequently, the system was characterized regarding the charging and discharging behavior and the efficiency in charging and discharging mode. Conclud-ing, an economic evaluation was performed. The results suggest further development of the cell formation unit, as cost effectiveness is given depending on the choice of the intermediate electrical storage."tesis de maestría.listelement.badge Experimental determination of single bubble behavior in a high-pressure optical alkaline electrolyzer(2017) Estruga, Pablo José María; Jordan, Thomas"The participation of renewable energy in the energetic matrix is increasing continuously and the electrical energy storage technologies will be crucial in the future energy sector scenario. With this technologies, it is possible to regulate the fluctuating electrical energy generation that renewable energy sources present. Under the “Power to gas” concept, hydrogen can be generated with the surplus of those sources (e.g. solar and wind power). Thus, it is essential to increase the efficiency of the storage technologies. The generation of hydrogen by means of high pressure electrolysis is presented as a possible solution. This master thesis was done within the cooperation program between the Institute of Nuclear and Energy Technologies (IKET) and the Instituto Tecnológico de Buenos Aires (ITBA). Experiments were performed with an alkaline high-pressure experimental electrolyzer, where pressure was rise up to 180bar. It was studied the case of single bubbles behavior, focusing on the typical diameters and rise velocities of hydrogen and oxygen bubbles. The obtained results were compared with a bubbles swarm behavior, where clear differences were observed. To achieve the single bubble generation, a new electrode was design and an electrical pulsed signals was applied as power supply."tesis de maestría.listelement.badge Experimental set-up for bubble behaviour in a high pressure alkaline electrolyte(2016) Frey, Félix; Jordan, Thomas; Orbaiz, Pedro"The increase in the proportion of renewable energy in the energy matrix and associated unpredictable electricity surpluses, the need for efficient forms of energy storage raises. Due to high energy density and transportability, hydrogen plays an important role as energy storage. After the production of hydrogen by electrolysis a significant percentage of the stored energy is used for the compression of the hydrogen gas. Higher efficiencies are reached by high pressure electrolysis, because subsequently compression of the hydrogen gas is not necessary. In the course of a cooperation between the Institute of Nuclear and Energy Technologies (IKET) and the Instituto Tecnológico de Buenos Aires (ITBA), a high pressure elec-trolyser Experiment has been developed at ITBA. The particularity about this device besides the high working pressure, are glass windows in the taps in order to be able to analyse the behaviour of the gas bubbles. Experiments for the investigation of the bubble behaviour have been performed at IKET. This master thesis describes the development of the project, from the design and construction of the electrolyser at ITBA, to the execution of first series of experiments at IKET. First conclusions about the bubble behaviour are presented".tesis de maestría.listelement.badge A robust optimization-based model predictive control of the energy management within grid-connected microgrids(2018) Roussineau, Eduardo Esteban; Otto, Philip"This master thesis presents an operational strategy for a microgrid-connected wayside energy storage device within a light rail application. This strategy is based on a mixedinteger linear program optimization formulated over a rolling horizon framework; the optimization takes into account forecasted values for renewable energy generation and electricity usage within the microgrid, as well as the prices for energy exchange with the main distribution grid. Robust optimization theory is used to create a robust counterpart formulation of the optimization problem so that the uncertainties present in forecasted values are handled."tesis de maestría.listelement.badge Use of energy surplus from local renewable sources, to produce electrolytic hydrogen for electricity generation at isolated places in Argentina(2018-09-17) Oettinger, Sebastián Federico; De Bernardez, Leopoldo"The aim of this project is to study the use of energy surplus from local renewable sources at isolated places in Argentina, to produce electrolytical hydrogen as clean fuel for electricity generation. Furthermore, the hydrogen production is seen as a storage technology to attenuate intermittent power supplies to microgrids. Significant knowledge, concerning Hydrogen production, storage and combustión, is available in Argentina at lab-prototype stage. Although experimental research is still required, this work is an approach to the utilization of the existing technology. Mostly, micro-grids depend on expensive energy generation, as gas turbines or diesel engines that have to work out of their optimal operating point. As case study, it is considered the city of Río Grande, placed at the province of Tierra del Fuego in Argentina, because it is not connected to the national grid and shows excellent wind conditions. Together with Río Grande, there are other micro-grids in the region, which could benefit from the incorporation of energy storage technologies and rely on renewable energy. The analysis of Río Grande’s energy situation, as well as the potential use of wind energy and Hydrogen storage, have shown synergies to reduce energy costs and emissions. Although a general solution was not reached, a scenario is shown in which the hydrogen production and the storage capacity are optimal to offer insight into the problematic and serve as reference for further investigations."