Ghobadian - Assistant professore mechanical Engineering
Rahimi - ME Mechanical engineering Tahran, Iran
Khatamifar

Biofuels are than substitute to fossil fuels. These fuels are less polluting in comparison to fossil fuels and can be produces from agricultural material residues. Considering the laboratory condition and fuel stability limits to be used, the suitable blending proportion of ethanol and diesel was determined to be 12 to 88. for maintaining the fuel stability at temperature lower than 15 C, the sunflower methy1 ester was added to the mixture. The engine performance at full load and no load conditions using base diesel fuel and fuel blend including net diesel, ethanol and sunflower methy1 ester blend was investigated considering fuel consumption , power and torque. The maximum power and torque product using diesel fuel was 17.3kW and 67.7 Nm at 3600 and 2800 rpm respectively. Adding 3% thanol and 20 sunflower methy1 ester, reduced maximum power and torque by 2.3 and 2.6% respectively and increased an average 2.2% bsfc for various speed range. Adding 6% thanol and 4% sunflower me thy1 ester, reduced maximum power and torque by 4.5 and 5.1 respectively and increased an average 5.5% bsfc for various speed range. Adding 9% ethanol and ethanol and 6% sunflower methyl 1 ester , reduced maximum power and torque by 6.4 and 3.8% respectively and increased an average 8.3% bsfc for various speed range. Adding 12% ethanol and 8% sunflower methy1 ester, reduced maximum power and torque by 8.1 and 6.5 % respectively and increased the average 12.1% bscf for various speed range.

Biethanol , Ediesel , Diesohol , Dulfuel , Biofuel , Biodiesel