EFFECT OF COMPRESSION RATIO ON PERFORMANCE AND EMISSION ANALYSIS OF DIESEL-ACETYLENE FUELLED SINGLE CYLINDER C.I. ENGINE

Interest in alternative fuels is increasing tremendously due to the concern over the supply, rising prices of the conventional fossil fuels and also the emissions produced by them. In this regard, there are two imperative issues that need to be solved. One is to reduce the dependence on conventional fossil fuels for sustainable future and the other is to regulate the emissions for environmental protection. Acetylene is one such kind of alternative fuel having remarkable combustion properties. 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, 23° before top dead centre and 210 bar, respectively. The effect on performance and emissions were reported. Acetylene Gas was inducted at three different flow rates of 60 LPH, 120 LPH and 180 LPH respectively at 20 CR. Experimental results showed that highest BTE of 25.09% and lowest BSEC were obtained at the flow rate of 120 LPH for dual fuel mode compared to the diesel mode. 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