STATITIONARY ENGINE PERFORMANCE USING MIXTURE OF SOYBEAN AND CASTOR BEAN BIODIESEL TO DIESEL OIL

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.

摘要：柴油发动机中替代燃料的应用一直是研究的热点，旨在探索新型燃料以拓展能源结构。本研究旨在评估在柴油（S500）中添加大豆和蓖麻籽生物柴油混合物（比例为25%和40%）的固定式发动机性能，包括扭矩、观察到的有效功率和比油耗。所分析的五种大豆（S）和蓖麻籽（C）生物柴油混合物分别为：S100C0、S75C25、S50C50、S25C75和S0C100，它们以B25和B40的比例添加到柴油中，总计十种处理方法，外加柴油S500的控制组（B7）。固定式发动机在3000、2700、2400、2100、1800和1500转每分钟的转速下进行测试。大豆和蓖麻籽生物柴油混合物以及商业柴油（B7）的发动机性能相似。在2700转每分钟时，B40 S100C0和B40 S75C25在观察到的有效功率和扭矩方面表现出更好的性能。使用B7柴油获得了最高的有效最大功率（3000转每分钟）。在较低的转速下，生物柴油混合物与B7柴油的观察性能相似，此外，相较于商业柴油，它们在扭矩和油耗性能上更为优越。