RESUMOPropôs-se, com este trabalho, avaliar o desempenho dinâmico de um trator agrícola funcionando com biodiesel destilado (50% etílico + 50% metílico) em função das proporções de biodiesel e diesel de petróleo (0 e 100%, 5 e 95%, 15 e 85%, 25 e 75%, 50 e 50%, 75 e 25% e 100 e 0%) respectivamente. O experimento foi realizado na área do Departamento de Engenharia Rural da Universidade Estadual Paulista -UNESP, Campus de Jaboticabal, SP, localizado na latitude 21º 14' 28" S e longitude 48º 17'12" W. Utilizou-se um trator 4 x 2 TDA com potência de 73,6 kW (100 cv) no motor e um trator de lastro. O biodiesel utilizado foi produzido à base de óleo residual de fritura de alimentos, o delineamento experimental foi inteiramente casualizado (DIC), com 7 tratamentos e 5 repetições, totalizando 35 observações, e os resultados evidenciaram que a mistura biodiesel e diesel de petróleo influenciou significativamente as variáveis consumo horário volumétrico, consumo horário mássico, consumo de combustível por área trabalhada e consumo específico. Quando o trator operou com 100% de biodiesel (B100) o consumo específico aumentou em média 18% em relação ao diesel (B0).Palavras-chave: biocombustível, mistura de combustíveis, consumo de combustível Dynamic performance of an agricultural tractor utilizing distilled biodiesel from spent oil ABSTRACTThe objective of this study was to evaluate the dynamic performance of an agricultural tractor utilizing distilled biodiesel (50% ethylic + 50% methylic) as a function of the proportion of biodiesel and diesel of petroleum (0 and 100%, 5 and 95%, 15 and 85%, 25 and 75%, 50 and 50%, 75 and 25% and 100 and 0%), respectively. This research was done in the area of the Department of Rural Engineering of the Paulista State University (UNESP), Jaboticabal Campus, SP, located in the latitude 21º 14' 28" S and longitude 48º 17'12" W. A tractor 4 x 2 FWA was used, with a 73.6 kW (100 HP) motor and a ballast tractor. The biodiesel used was produced from spent oil from food frying. The experimental design was entirely randomized, with 7 treatments and 5 repetitions, totaling 35 observations. The results showed that the biodiesel and diesel blend significantly influenced the hourly volumetric consumption, hourly mass consumption, fuel consumption per worked area and specific fuel consumption variables. When the tractor operated with 100% of biodiesel (B100) the specific fuel consumption increased 18% on average in relation to diesel (B0).
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