Abstract: Demand for higher fuel economy and lower exhaust emission of combustion ignition engine need to be achieved either by reducing exergy loss or blending diesel with bio-fuel to reduce pollutant emission from transportation sector and meet satisfactory engine performance which is major technical challenge since the world is confronted with energy scarcity. Computational model of TDC was investigated to get energy and exergy distribution for different trendsetting internal combustion engine. The result indicated that the 50% heat release point (CA50) considerably affect fuel efficiency and ringing intensity. Heat transfer loss of CDC depends on temperature gradient, in case of homogeneous charge compression ignition (HCCI) and reactivity controlled compression ignition (RCCI) it depends on heat transfer area. Exergy destruction is related to different factor, temperature inside cylinder, air fuel ratio, chemical reaction rate, combustion duration and temperature. Considering these factor conventional diesel combustion (CDC) engine shows high exergy destruction compared to HCCI and RCCI. Overall change in exergy distribution obtained from second law of thermodynamic for three different combustion strategy are consistent with those obtained from first law of thermodynamic. HCCI shows the highest energy and exergy efficiency and CDC performs the worst.
Keywords: HCCI Homogeneous Charge Combustion Ignition, RCCI Reactivity Controlled Combustion, Ignition, CDC Conventional Diesel Combustion.