Experimental Investigation on Performance and Emission Characteristics of Biodiesel Fuelled Compression Ignition Engine with Oxygen Enrichment
Abstract
In order to achieve better performance and to regulate exhaust emissions of Internal Combustion (IC) engines, oxygen-enriched combustion technology is a prominent way to promise the above needs. The research was conducted in a single-cylinder 4stroke diesel engine in which bio-diesel is used as a fuel; prepared from waste cooking oil and for different percentages of oxygen in suction air to analyze the performance characteristics, combustion characteristics and emission parameters of the engine. As waste cooking oil can produce adverse effects in the environment mainly through water and soil pollution, so the utilization of waste cooking oil in a proper way is an essential need, one such way is converting waste cooking oil into biodiesel through transesterification process, which could meet the energy demand of recent decade. For enriching O2 in suction air; modification was done in the intake manifold for supplying O2 from the oxygen cylinder, the concentration of O2 in suction air is measured using an oxygen analyzer. Performance characteristics, combustion characteristics, and emission parameters are analyzed for B100 fuel and various percentages of oxygen by volume in suction air ranging from 21% to 28% and the result shows that specific fuel consumption (SFC) is decreased and brake thermal efficiency (BTE) increases with increasing oxygen concentration. Increasing oxygen concentration in suction air paves way for complete combustion, which results in decreasing HC and CO emission. However, the NOx and CO2 forming tendency of the engine increases with increasing oxygen concentration due to magnified combustion temperature.
