Research of the efficiency of use of second-generation biodiesel and diesel blends in compression ignition engines assessing exhaust gas recirculation
Santrauka
The article presents the research of energy indicators of compression ignition engines fuelled on different conventional diesel and second - generation biodiesel blends with bio diesel volume concentration of 0%, 30%, 50%, 70% and 100%. NESTE biodiesel NExBTL (BTL – Biomass to Liquid) was used for the research. Tests of physico - chemical properties of these fuel blends were carried out. In the course of the engine bench testing, exhaust gas recirculation (EGR) of the engine was changed from 0 to 0.3 – 0.35. Hourly and brake specific fuel consumption of fuel mass and fuel volume was determined by increasing second - generation biodiesel concentration in the fuel blend and changing EGR. NExBTL biodiesel was calculated to have a trend of improving the engine efficiency coefficient. Low EGR (up to 0.05) has a low impact on engine efficiency, but when increasing EGR, adverse effect on engine efficiency increases more intensively.