Experimental Investigation of Performance Characteristics of Compression Ignition Engine Fuelled with Punnai Oil Methyl Ester Blended Diesel

  • Mathan Raj Vijayaragavan Department of Mechanical Engineering, SRM University, Chennai, India
  • Ganapathy Subramanian
  • Lalgudi Ramachandran
  • Manikandaraja Gurusamy
  • Rahul Kumar Tiwari
  • Sanat Kumar
Keywords: biodiesel, compression ignition engine, Punnai oil biodiesel, performance


Biodiesel is a renewable substitute to conventional diesel and offers cleaner performance. This
paper deals with performance characteristics of four stroke, water cooled Compression Ignition (CI) engine
fuelled with four different oils: diesel, diesel-punnai oil biodiesel 10% (B10), diesel-punnai oil biodiesel
20% (B20) and diesel-punnai oil biodiesel 30% (B30). The present research, experiments were conducted
to study the effect of viscosity, cetane number, flash point, calorific value and density on performance
characteristics of diesel, Punnai oil biodiesel and its different blends (B10, B20, B30). The experimental
results of this study showed that the diesel has 2.6% and 4.6% higher brake specific fuel consumption
(BSFC) as compared to B10 and B20, respectively at full load, whereas BSFC of diesel was same as B30
at higher load. Volumetric efficiency and mechanical efficiency of B10 was 1.2% and 7.5% higher as
compared to diesel at full load condition. Brake Thermal Efficiency (BTE) and indicated thermal efficiency
of B20 was 8.12% and 7% higher as compared to diesel at full load. From this study, it is concluded that
Punnai oil biodiesel could be used as a viable alternative fuel in a single cylinder, four stroke, water cooled
direct injection diesel engine.