THE ALTERNATIVE FUELS FOR FOUR STROKE COMPRESSION IGNITION ENGINES: PERFORMANCE ANALYSIS

In this experimental study, the Diesel fuel blends with different percentages of Ethanol and  Methanol  with  a  constant  percentage  (5%)  of  n-Butanol were  used.  These  percentages  were 5%,  10%  and  15%  for  Ethanol  and  Methanol.  The  Diesel  fuel  blends  were  designated  as Z5E5D90,  Z5E10D85,  Z5E15D80  and  Z5M5D90,  Z5M10D85,  Z5M15D80.  The  experiments were carried out on a three cylinder, four stroke, direct fuel injection compression ignition engine on different engine speeds at constant load, while engine performance and exhaust gas emissions of  Carbon  Monoxide  (CO)  and  Hydrocarbons  (HC)  were  also  examined.  The  engine  speed  was varied from 800 rpm to 1800 rpm with an increment of 200 rpm.  During the experimentation the times for consumption of 50 ml of fuel were recorded. The values of Brake Power, Brake Specific Fuel  Consumption  and  Brake  Thermal  Efficiency  were  calculated  by  using  the  formulas.  The experimental  outcomes  were  analyzed,  and  showed  an  increase  in  Brake  Specific  Fuel Consumption  and  decrease  in  Brake  Thermal  Efficiency  and  exhaust  gas  emissions  of  Carbon Monoxide (CO) and Hydrocarbons (HC) with the use of different Diesel fuel blends.