Abstract
ABSTRACT The use of alternative fuels in diesel engines has been the subject of research that seeks new fuels to expand the energy matrix. The aim of this study was to evaluate the performance of the stationary engine with the use of mixtures of biodiesel from soybean and castor bean added to diesel (S500) in two proportions (25% and 40%), evaluating the torque, effective power observed and specific consumption. The five biodiesel mixtures of soybean (S) and castor bean (C) analyzed were: S100C0, S75C25, S50C50, S25C75 and S0C100, which were added to the diesel in proportions B25 and B40, totaling ten treatments, plus the control with diesel S500 (B7). The stationary engine was subjected to the rotations of 3000, 2700, 2400, 2100, 1800 and 1500 rpm. The performance of the engine was similar for all biodiesel mixtures of soybean and castor bean, and commercial diesel (B7). The B40 S100C0 and B40 S75C25 provide better performance in terms of effective power observed and torque at 2700 rpm. The highest effective maximum power (3000 rpm) was obtained with the use of B7 diesel. In the lower rotations, it was possible to identify a similar performance result of the biodiesel mixtures with the B7, in addition to providing better torque and consumption performance compared to the commercial diesel.
Highlights
Most machines, currently used in agriculture, for mobility or power generation, are equipped with diesel cycle engines because of the efficiency they present
Significant differences were observed in the results of effective power observed, specific consumption and torque from the BX/soybean and castor bean biodiesel mixtures (SyCx) mixtures and the operating regimes, as well as for the interaction of these factors with each other
The performance of the engine, from the effective power observed, in relation to the rotations used (Figure 1), indicates an increase in power using the proportions B25 and B40, according to soybean and castor bean biodiesel mixtures (SyCx), similar to that obtained with B7
Summary
Currently used in agriculture, for mobility or power generation, are equipped with diesel cycle engines because of the efficiency they present. The unavailability prediction of long-term of fossil fuels and the emission of pollutants has stimulated research on biofuels (Perin et al, 2015), mainly with respect to environmental, economic, political, cultural and technical aspects for agriculture (Ballesteros et al, 2014). The biodiesel has been used in diesel cycle engine in combination with diesel, with soybean being the main source used for its production, a factor that has stimulated the investigation of the effects of the use of biodiesel from other sources and percentages. Castellanelli et al (2008), for example, found that torque, power and specific consumption were similar between B0 (diesel), B2, B5 and B10, and the best engine performance occurred with B20 and the worst with soybean B100. The biodiesel has been used in diesel cycle engine in combination with diesel, with soybean being the main source used for its production, a factor that has stimulated the investigation of the effects of the use of biodiesel from other sources and percentages. Castellanelli et al (2008), for example, found that torque, power and specific consumption were similar between B0 (diesel), B2, B5 and B10, and the best engine performance occurred with B20 and the worst with soybean B100. Nietiedt et al (2011) identified better potency and consumption with the use of B10 and the worse with B100 compared to B5 and B20
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