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首页> 外文期刊>Clean technologies and environmental policy >Effect of compression ratio on performance, emission and combustion characteristics of diesel-acetylene-fuelled single-cylinder stationary CI engine
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Effect of compression ratio on performance, emission and combustion characteristics of diesel-acetylene-fuelled single-cylinder stationary CI engine

机译：压缩比对柴油-乙炔单缸固定式CI发动机性能，排放和燃烧特性的影响

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摘要

The present investigation aims to depict the effect of compression ratio on performance, emission and combustion characteristics of diesel-acetylene-fuelled stationary compression ignition engine. The optimum values for compression ratio, injection timing and injection pressure for diesel were experimentally found, and baseline data were established as 20, 23A degrees before top dead centre and 210 bar, respectively. In order to investigate the effect of acetylene fuelling, acetylene gas was inducted at four different flow rates of 60, 120, 180 and 240 litres per hour at compression ratio 20. It was observed that the flow rate of 120 litres per hour gave the best performance with highest brake thermal efficiency of 25.09%. In order to find the optimum compression ratio for acetylene fuelling at 120 litres per hour, experimentation was done at different compression ratios of 18, 19, 20, 21 and 22. Experimental results showed that highest brake thermal efficiency of 25.72% was achieved at compression ratio 21 for diesel-acetylene fuelling which was much higher than 23.32% for pure diesel. Carbon monoxide, hydrocarbon and smoke emissions were also measured and found to be lower, while the NOx emissions were higher at optimized values in dual-fuel mode as compared to those for pure diesel. Peak cylinder pressure and net heat release rate were also calculated and found to be higher in dual-fuel mode compared to diesel mode.
机译：本研究旨在描述压缩比对柴油-乙炔燃料固定式压缩点火发动机的性能，排放和燃烧特性的影响。通过实验找到了柴油的压缩比，喷射正时和喷射压力的最佳值，并将基线数据分别确定为上止点之前的20、23A度和210 bar。为了研究乙炔燃料的添加效果，在压缩比为20的情况下，以每小时60、120、180和240升的四种不同流量引入乙炔气体。观察到，每小时120升的流量提供了最佳的流量。性能，最高的刹车热效率为25.09％。为了找到每小时120升乙炔燃料的最佳压缩比，在18、19、20、21和22的不同压缩比下进行了实验。实验结果表明，压缩时可达到25.72％的最高制动热效率。柴油-乙炔燃料的比例为21，远高于纯柴油的23.32％。与纯柴油相比，双燃料模式下的一氧化碳，碳氢化合物和烟气排放量也更低，而在最佳值下的氮氧化物排放量更高。还计算出了峰值气缸压力和净放热率，发现与柴油模式相比，双燃料模式下的峰值压力更高。

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