Browse Publications Technical Papers 2008-01-0757
2008-04-14

An Experimental Investigation on Performance and Emission Characteristics of Eucalyptus Oil-Diesel Blends in a D.I. Diesel Engine 2008-01-0757

An experimental investigation was carried out with biomass derived eucalyptus oil with diesel as a fuel for diesel engine. The properties of eucalyptus oil like viscosity, volatility, calorific value, latent heat of vaporization, boiling point are comparable with diesel fuel; hence it has been tried in diesel engine. However, the low cetane number of eucalyptus oil had prevented the use of 100% replacement of diesel in diesel engines. In the present work, it was found that the engine was able to run with eucalyptus oil and diesel blend up to the ratio of 60:40 on volume basis. But due to erratic performance and undesirable noise, the ratio was restricted to 50:50. This has been done to quantify the amount of diesel fuel replacement and to maintain the minimum requirement of cetane number. Smoke, UBHC and CO emissions were decreased with slight increase in NOx for eucalyptus-diesel blends. There was an increase in brake thermal efficiency for all the blends at higher loads without much variation at lower loads. Combustion characteristics like heat release rate and ignition delay were calculated and compared with standard diesel. Combustion characteristics of Eu 20 blend was in close agreement with standard diesel. Based on the performance and combustion analysis Eu 20 blend has been proposed for diesel engine operations.

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