Prediction of DI-CI Engine Performance and Emission Characteristics of Varying Renewable Diesel Fuels with Experimental Results from Marine Diesel fuel
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- Institutt for marin teknikk 
This paper discusses finding of combustion research carried out using Ricardo hydra research diesel engine with varying renewable fuels. The primary fuel of investigation is rapeseed methyl ester (RME) and marine diesel fuel (MDO) was used as the primary reference fuel (PRF). The results of the PRF have been acquired by experiment and have been used to characterize the heat release rates, brake fuel conversion efficiency (BFCE), brake specific fuel consumption (BSFC), brake fuel energy consumption (BSEC), exhaust temperature; Oxides of nitrogen (NOx), carbon monoxide (CO), carbon dioxide (CO2) and hydrocarbon (HC) emissions have also been studied. Empirical correlations have been developed and used to predict the corresponding results with several blends of renewable fuels. The analysis of the results showed a good correlation between the results of the MDO and the blends of the renewable fuels. The results showed that the difference between mean BSFC of the MDO and the predicted values of the blend of the liquefied petroleum and 10% rapeseed (LGO-10) was only 0.82%. Predicted values for B20, B40 and B100 were 1.65%, 3.33% and 8.53% respectively. At maximum load the predicted lost in power for LGO-10 ranges from 0.88% at maximum speed to 0.85% at low speed. The predicted lost in power for B20, B40 and B100 were 1.61%, 3.21% and 7.86% respectively at maximum speed and 1.71%, 3.13% and 7.86% respectively at low speed range. The mean increase between the measured mean NOx emission from MDO and the LGO-10 was 0.98%, while CO and CO2 emissions fall by 6.35%. There was also a mean reduction of HC emission by 10.59%. Similar changes have been predicted in B20 and B40 emissions.