Energía y Ambiente (ITBA-KIT)
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Browsing Energía y Ambiente (ITBA-KIT) by Subject "ANALISIS ECONOMICO"
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tesis de maestría.listelement.badge Feasibility study of hydrogen fueled internal combustion hybrid bus operating under real traffic urban conditions in Buenos Aires, Argentina(2018-12-18) Britz, Sven; Orbaiz, Pedro"This thesis evaluates the technical, economic and environmental performance of a hydrogen fueled hybrid bus, which uses an internal combustion engine as a power unit. Results are compared to those of a conventional diesel bus and to those of two commercially available hydrogen fuel cell buses. The performance of the different vehicles, under real driving conditions, is evaluated using validated models of these on the Autonomie simulation platform. On the other hand, the life-cycle GHG emissions of the buses are estimated with hydrogen being produced from different primary sources. Whilst the first scenario assumes that hydrogen is produced from natural gas via steam methane reforming, the other three assumes electrolytic production using different electricity production mixes. Finally the total cost of ownership of each hybrid bus is calculated and compared to that of the conventional bus. Results show that all hydrogen buses have a considerable lower energy consumption than that of the conventional vehicle. This is manly due to the use of the hybrid powertrain architecture. When comparing the different hydrogen buses, as expected, the fuel cell vehicles result in a higher efficiency than the internal combustion engine vehicles, but in a considerable higher cost, making the use of internal combustion engines a more cost effective way to reduce GHG emissions. The life cycle emission analysis shows that the environmental performance of all hydrogen vehicles is highly dependent on the carbon intensity of the hydrogen production. Overall, whilst fuel cells are more efficient than ICEs, the considerable lower cost of ICEs makes the H2ICE hybrid bus a more cost effective way of reducing GHG emissions."tesis de maestría.listelement.badge Price-based charging scheduling optimization for battery electric vehicles(2019) Richards, Juan Jeremías; Ried, Sabrina; Ensslen, Axel"The high emissions of greenhouse gases and the impact generated on the environment by human behavior during the last few years has led many governments to decide to promote the use of electric cars for passenger transport, as well as the replacement of conventional energy sources by renewable ones. These radical changes have a high impact on the installed energy infrastructure, especially if electric vehicles are charged in an uncontrolled mode because this could generate peaks of consumption saturating the electricity grid, as they require a high-power load. However, if the same vehicles could be charged in a controlled manner this would bring several advantages, such as shifting load to times when there is less consumption thus decreasing the power required during consuming peaks, or charging them during times when the price of electricity is low, thus generating savings in energy costs. In this master's thesis, a model was developed to find a schedule for charging electric vehicles that reduce these costs, later analyzing the economic benefits that this entails."tesis de maestría.listelement.badge Techno-economic evaluation of an intermediate pyrolysis integrated system as a process step to produce power, heat and energy carriers(2019) Laurens, Santiago; Zimmer, Tobias"The growing concern about the increase in greenhouse gases and the consequences of these reached the point of having to resort to new and innovative technologies. In order to ensure the sustainable development of these technologies, a technical and economic prefeasibility study is necessary to guarantee the successful development of these alternatives. The aim of this work is to provide a complete technical-economic evaluation of an integrated system of intermediate pyrolysis as a previous step of the process to produce energy, heat and energy carriers."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."