Investigating the Effects of Using Biodiesel Extracted from Persian lilac Seeds on the Performance of a Diesel Engine

The gradual depletion of fossil fuels and the increase on their cost have made the researchers to look for renewable sources of energy. Biodiesel fuel has attracted many researchers due to its low environmental pollution and being a renewable fuel. In this research, biodiesel was prepared by transesrtification of Persian lilac seed oil. The prepared fuel was mixed with regular petro diesel in 0, 10, 20, 30 and 100% proportions (biodiesel/diesel). The moisture was tested using a diesel engine operating at 1300 to 1800 rpm with a variable load of 200, 250 and 300 Nm. The test results indicated that with increase in proportion of biodiesel/diesel the break specific fuel consumption (bsfc) increased and the break mean effective pressure (bmep) decreased. When pure biodiesel was used as fuel, in comparison with pure diesel fuel, bsfc increased up to 68.9% and bmep decreased up to 13.4%. The best performance for the blended fuel was achieved when using B10 or B20. With theseblends, the increase in bsfcwas 4.9 and 6.8%, respectively and thedecrease in bmep was3.6 and 4.3%, respectively.