EFFECT OF COMPRESSION RATIO AND INJECTION PRESSURE ON EXERGY ANALYSIS OF CI ENGINE FUELED WITH WCSFO BIODIESEL BLEND
Keywords:
Biodiesel (WCSFO), Diesel Fuel, Blended Fuel, Exergy Analysis, Compression Ratio, Injection PressureAbstract
Exergy analysis method has been widely used in the design, simulation and performance assessment of
various types of engine for identifying losses and efficiencies. In this study, the second law of thermodynamics is
employed to analyze the quality of energy in a single cylinder, 4-stroke, water cooled, and variable compression ratio
(VCR) engine running with WCSFO biodiesel blend (B20). Exergy analysis includes finding of various availability such
as input availability, brake power availability, cooling water availability and exhaust gas availability. From exergy
analysis components of major exergy destruction can be found out. In this research energy analysis was carried out for
B10 to B50 WCSFO biodiesel blends.B20 biodiesel blend gave better performance among all blend hence exergy
analysis is carried out for this blend to check the effect of compression ratio (CR) and injection pressure (IP) on the
exergy efficiency. All possible combination of compression ratio (16,17,18) and injection pressure (180 and 200 bar)
were set on the engine. It was found that engine gives higher exergy efficiency at combination CR 16 and IP 180 bar at
low and medium load and highest value was found at CR 17 and IP 180 bar at higher load condition. Also it was noticed
that exhaust gas contains higher availability than cooling water.
