• Akhil P A
• Dr. G Venugopal

In an IC engine, major part of the heat energy produced is lost as waste heat. Exhaust heat recovery to improve the performance of IC engines and use of alternative fuel as substitute for conventional fossil fuel have become the topic of interest to many researchers. The aforesaid topics were addressed independently and separately by several researchers. In the present work, preheating of fuel and inlet air, simultaneously, on the performance of CI engine powered by coconut testa biodiesel is studied. Preheating of fuel and inlet air is done by utilizing waste heat that is being dissipated from the engine. A finned tube cross flow heat exchanger fixed to the engine exhaust pipe is usedto extract waste heat from exhaust gas for preheating of fuel and inlet air.The results of the study reveal that for fixed injection timing thermal efficiency of the engine increases with increase in temperature of the fuel and oxidizer admitted to the engine until a limiting value is reached, thereafter, the thermal efficiency decreases due to undesirable conditions. The emission of CO and unburnt HC was found to decrease with increase in inlet temperature of fuel and oxidizer. At the opposite, slight increase in emission of CO2and NOx was observed with increase in inlet temperature of fuel and oxidizer.

Alternative fuel, Coconut testa biodiesel, Cross flow heat exchanger, Exhaust heat recovery, Preheating

"EXPERIMENTAL STUDY ON THE EFFECT OF FUEL AND INLET AIR PREHEATING ON THE PERFORMANCE OF A BIODIESEL POWERED CI ENGINE", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 8, page no.369-376, August-2018, Available :http://www.jetir.org/papers/JETIRA006067.pdf

"EXPERIMENTAL STUDY ON THE EFFECT OF FUEL AND INLET AIR PREHEATING ON THE PERFORMANCE OF A BIODIESEL POWERED CI ENGINE", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 8, page no. pp369-376, August-2018, Available at : http://www.jetir.org/papers/JETIRA006067.pdf