Estudo do desempenho de um motogerador a partir da combustão de diferentes misturas de gasolina-etanol

• Autor(a) principal: Viola, Matheus [UNESP]
• Data de Publicação: 2017
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/203694; http://www.athena.biblioteca.unesp.br/exlibris/bd/capelo/2019-10-22/000919398.pdf
• topic: Etanol; Gasolina; Planejamento experimental; Ethanol

Currently, not only in Brazil, but also all over the world, one of the most discussed topics in the energy field is related to the availability of energy resources and its use in existing machines. Based on this, there is a need to optimize the performance of current engines, considering the possible blends between fossil and renewable fuels. These different blends have influence on the operating parameters of an engine (power, voltage, current) as well as exhaust gases emitted (CO, CO2, NOx). Thus, in this undergraduate thesis, it is proposed to study the performance of a power generator and also to evaluate the emissions generated during the combustion of different gasoline-ethanol blends for different loads applied. The tests were performed on a power generator coupled to an internal combustion engine (Otto cycle). The experimental workbench was instrumented in order to measure the values of voltage, current, power and the emissions generated during the combustion. The statistical methodology called Response Surface Methodology (RSM) was applied with 3 replicates at the center point, 4 axial points and 22 combinations, totalizing 11 trials that were randomly performed, varying the percentage of ethanol and also the applied load. Based on the measurements, the response surfaces were obtained, and the statistical significance was determined by the analysis of variance (ANOVA). It was observed that the increase in the ethanol percentage in the blend had a small influence on the operating parameters of the power generator, but it was observed that the variations in the percentages of each one of the fuels had a big influence on the exhaust gases like CO2, NOx and O2