PERFORMANCE AND EMISSION CHARACTERISTICS OF A FOUR STROKE CI ENGINE BY VARIOUS INJECTION PRESSURES BY USING ALGAE BIODIESEL

Abstract

There is a lot of need to search for an alternative fuels in place of conventional fuels as the reserves of conventional fuels are decreasing due to increase in their consumption in day to day lives and these fossil fuels in near future will become rare due to its indiscriminate extraction as well as utilization. Diesel fueled vehicles are releases number of harmful emissions like CO, UHC, NOX , CO2, sooth and particulate matter etc. in considerable quantities which are very harmful to environment as well as human beings. To provide a healthy environment to our next generations we should reduce the releasing the emissions from automobiles. However, to overcome this problem the bio-fuels are being used in the field of IC engines as alternate fuels. Therefore Algal biodiesel is considered as a promising option as they are clean renewable fuels and best substitute for now day’s conventional fuels in internal combustion engines. The important advantages of using algal biodiesel are its renewability and better quality of exhaust gas emissions. Depending on the species and cultivation conditions, algae can contain extremely high percentage of lipids or carbohydrates that can be easily converted into whole range of biofuels including biodiesel or bio ethanol. The main focus of this work is to replace the conventional fuels with the algal oil which is directly injected into the combustion chamber and also blended with non-renewable fuels at 20% by volume in a single cylinder four stroke water cooled light duty injection CI engine at different injection pressures like 180,190 and 200
bars. The tests were conducted for pure diesel and B20 algae oil in diesel engine at constant speed of 1500 rpm with varying the loads. The performance results at 180 to 190 bars of blend very closer to pure diesel results. The emissions UHC, CO and CO2 are very less at 180 bars than pure diesel. The NOx emissions are lesser at 200 bars compare to pure diesel. The overall performance is good at 180 and 190 bars. But the emissions are decreased when increasing injections pressure.