Abstract
COMPARATIVE STUDY OF A DUAL FUEL SYSTEM SPARK IGNITION ENGINE
*D. J. Enyia and O. Ugbine
ABSTRACT
Considering the importance of alternative fuels in IC engines for the safety of the environment, liquefied natural gas has been extensively employed in SI engines. In this regard, a comprehensive analysis has been made of the engine performance, and emissions rate, using PMS and LPG at different operating conditions for the economic analysis were all made. it was seen that using LPG there was an increase in thermal efficiency of 0.75%, a relative efficiency of 0.67%, and an overall efficiency of 0.76% but a reduction in the mechanical efficiency of 0.83% while in PMS fuel there is an increase in mechanical efficiency 0.88% but a reduction in Thermal efficiency 0.39%, Relative efficiency 0.47%, Overall efficiency 0.57%. The key parameters of the engine performance like brake power, engine efficiency, engine torque, and specific energy consumption were investigated at 80% and engine speed 1590-1650 range of r/min. For the sake of emission tests, speed was varied uniformly by varying load at constant throttle. Furthermore, the engine was run at load and off-load. Although liquefied natural gas shows a decrease in brake and specific energy consumption and emission content performed relatively better in the case of brake power.
[Full Text Article] [Download Certificate]