TY - JOUR
TI - Experimental and analytical investigation on the emission and combustion characteristics of CI engine fueled with tamanu oil methyl esters
AU - Perumal Navaneetha Krishnan
AU - Durairaj Vasudevan
JN - Thermal Science
PY - 2016
VL - 20
IS - 14
SP - 1099
EP - 1109
PT - Article
AB - The emission and combustion characteristics of a four stroke multi fuel  single cylinder variable compression ratio engine fueled with tamanu oil  methyl ester and its blends 10%, 20%, 40%, and 60% with diesel (on volume  basis) are examined and compared with standard diesel. Biodiesel produced  from tamanu oil by trans-esterification process has been used in this study.  The experiment has been conducted at a constant engine speed of 1500 rpm with  50% load and at compression ratios of 16:1, 17:1, 18:1, 19:1, and 20:1. With  different blend and for selected compression ratio the exhaust gas emissions  such as CO, HC, NOx, CO2, and the combustion characteristics are measured.  The variation of the emission parameters for different compression ratios and  for different blends is given, and optimum compression ratio which gives best  performance has been identified. The results indicate higher rate of pressure  rise and minimum heat release rate at higher compression ratio for tamanu oil  methyl ester when compared with standard diesel. The blend B40 for tamanu oil  methyl ester is found to give minimum emission at 50% load. The blend when  used as fuel results in reduction of polluting gases like HC, CO, and  increase in NOx emissions. The previously mentioned emission parameters have  been validated with the aid of artificial neural network. A separate model is  developed for emission characteristics in which compression ratio, blend  percentage and load percentage were used as the input parameter whereas CO,  CO2, HC, and NOx were used as the output parameter. This study shows that  there is a good correlation between the artificial neural network predicted  values and the experimental data for different emission parameters.