Análise de desempenho de um grupo motor-gerador ciclo diesel abastecido com diesel S10, diesel S500 e misturas com biodiesel e etanol

Abstract

The electric power generation by decentralized systems represents an important instrument for universalizing the access to electricity, especially in isolated locations. To achieve this goal, electric energy generation system development using renewable fuels represents an attractive alternative due to economic and environmental aspects. The present work focuses on the performance analysis of a diesel engine-generator group, 13.2 kW nominal power at 3600 rpm, originally designed to operate with commercial diesel, when fueled with different types of fuels. The test conditions were based on the ABNT NBR ISO 1585 standard consisting on evaluation of S10 and S500 diesel oils with different diesel/biodiesel/ethanol ternary blends, submitted to different power applied to the generator, varying between 25%, 50% and 75% of the nominal power. Parameters such as lubricating oil temperature, rotation, power, torque and fuel consumption between the different blends were analyzed, specifying their specific consumption. The results showed that 2% of anhydrous ethanol is the maximum percentage of addition in the mixtureThe mixtures with 30% of biodiesel and 2% of ethanol presented the highest similarity with the commercial diesel without compromising performance. No variations were found in the comparative variables studied between the S10 and S500 diesel, and the use of the S10 option should be prioritized due to the lowest sulfur content.