Abstract
In this present work aims at evaluate the performance and emission characteristics of a diesel engine fueled with annona-ethanol blend as a fuel. A single cylinder water-cooled four stroke diesel engine was used. The ethanol is blended with Annona Methyl Ester (AME) in the proportions of 60-40, 55-45, 50-50, 45-55. The performance and emission characteristics of annona-ethanol blends are evaluated by operating the engine at different load conditions. The performance parameters such as Brake Specific Fuel Consumption (BSFC), Brake Thermal Efficiency (BTE) and Exhaust Gas Temperature (EGT) were evaluated. Further, the exhaust emissions such as oxides of nitrogen (NOx) unburned hydrocarbon (HC), carbon monoxide (CO) and smoke were measure. It is found that annona-ethanol blend (A-E-50-50) showed slight increase in brake thermal efficiency with the reduction of exhaust gas temperature. Further, it is found that the slight reduction in NOx emission and smoke emission. It is also found that reduction in HC and CO emission was achieved. Hence, it is concluded that A-E 50-50 can be used as alternate fuel for DI diesel engine without any major modification.
Highlights
Diesel engines are commonly used as prime movers in the transportation, industrial and agricultural sectors because of their high brake thermal efficiency and reliability
It is observed that Brake Specific Fuel Consumption (BSFC) of diesel is minimum compared with other proportions of Annona Methyl Ester-Ethanol blends at all loads
BSFC is 0.297 kg/ kW-hr for Annona-Ethanol (A50-E50) and 0.287 kg/kW-hr for diesel fuel at maximum load. This is due to complete combustion and excess oxygen, high specific gravity, high viscosity and lower calorific value of biodiesel when compared to diesel. This is due to the lower calorific value of annona methyl ester-ethanol compared with that of neat diesel fuel
Summary
Diesel engines are commonly used as prime movers in the transportation, industrial and agricultural sectors because of their high brake thermal efficiency and reliability. The increasing industrialization and motorization of the world has led to a steep rise in the demand of petroleum based fuels. Petroleum based fuels are obtained from limited reserves. These finite reserves are highly concentrated in certain regions of the world. Those countries not having these resources are facing energy/foreign exchange crisis, mainly due to the import of crude petroleum. It is necessary to look for alternative fuels which can be produced from resources available locally within the country such as alcohol, biodiesel, vegetable oils etc. Ethanol is an attractive alternative fuel because it is a renewable bio-based resource and it is oxygenated, thereby providing the potential to reduce particulate emissions in compression ignition engines
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