Gurusamy Manikandaraja, Subramaniyan Malarmannan, Ponnusamy Chandrasekaran
Department of Mechanical Engineering, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Chennai, Tamil Nadu, 603203, India.
Environ Sci Pollut Res Int. 2024 Jun 19. doi: 10.1007/s11356-024-33970-y.
This article compares the influence of blending the low-viscous oxygenated camphor oil with hydrocarbon diesel fuel and high-viscous oxygenated Karanja oil. The experiment is conducted in a four-stroke one-cylinder naturally aspirated Kirloskar compression ignition (CI) engine coupled with an eddy current dynamometer. The three types of fuel blends are prepared by blending the camphor oil with Karanja oil on the volume ratio of 30:70 (C30K70), 50:50 (C50K50), and 70:30 (C70K30), and the other three types of fuels are prepared by blending the camphor oil with diesel on the volume ratio of 30:70 (C30D70), 50:50 (C50D50), and 70:30 (C70D30). The experimental efficiency results show higher thermal efficiency of 31.86% and 30.84% for C70D30 and C70K30 at rated operating conditions. The brake-specific energy consumptions of C70D30 and C70K30 were found to be 11.29 and 11.67 MJ/kWh, respectively, at rated operating conditions. The lowest CO, CO, HC, and smoke emissions are found for C70D30 at rated operating conditions, which are 96.58%, 6.15%, 34.20%, and 7.59% lower than diesel. However, the NO emissions were found to be 27.62% higher for C70D30 than diesel at full load. The rate of pressure rise, net heat release rate, and cyclic variations were found to increase with increase in proportion of the camphor oil. The P-v diagram also confirms the lower heat addition period for the C70D30 and C70K30 with an increase in brake thermal efficiency. The actual compression ratio and the actual cutoff ratio are found to have a reasonable correlation with the thermal efficiency of the engine. The exergy efficiency of C30K70 is found higher which is 2.11% higher than diesel fuel at rated power. Second-order polynomial equations were obtained for the engine characteristics using the curve fitting method, and the characteristic equations confirmed the confidence level of 95%.
本文比较了将低粘度氧化樟油与烃类柴油以及高粘度氧化卡兰加油混合的影响。实验在一台四冲程单缸自然吸气基尔洛斯科压缩点火（CI）发动机上进行，该发动机与一台涡流测功机相连。三种燃料混合物是通过将樟油与卡兰加油按体积比30:70（C30K70）、50:50（C50K50）和70:30（C70K30）混合制备而成，另外三种燃料是通过将樟油与柴油按体积比30:70（C30D70）、50:50（C50D50）和70:30（C70D30）混合制备而成。实验效率结果表明，在额定运行条件下，C70D30和C70K30的热效率较高，分别为31.86%和30.84%。在额定运行条件下，C70D30和C70K30的制动比能量消耗分别为11.29和11.67兆焦/千瓦时。在额定运行条件下，C70D30的一氧化碳、碳氢化合物和烟雾排放最低，分别比柴油低96.58%、6.15%、34.20%和7.59%。然而，在满负荷时，C70D30的氮氧化物排放比柴油高27.62%。发现压力上升率、净热释放率和循环变化随着樟油比例的增加而增加。P-v图也证实了C70D30和C70K30的热添加期较短，同时制动热效率有所提高。发现实际压缩比和实际截止比与发动机的热效率有合理的相关性。发现C30K70的（火用）效率较高，在额定功率下比柴油燃料高2.11%。使用曲线拟合方法获得了发动机特性的二阶多项式方程，特性方程的置信水平为95%。
