• Y.Hari Krishna
• Ravi Kumar
• Y.S.R Prasad Reddy
• R.J.Sri Harsha
• S.N.Lalith Kumar

Internal Combustion Engines (IEC) is one of the most important prime movers used in automobile, manufacturing, aerospace sectors etc. It is a well-known fact that most of the chemical energy obtained by the combustion of fuels are carried out by the exhaust gases. It is known fact that exhaust gas from an IEC carries away about 30 – 40% of heat of combustion. The energy available in this stream of exhaust gases goes as a waste (if not utilized). This paper presents a concept of recovering waste heat energy of exhaust gas of diesel engine by placing a heat exchanger in the exhaust manifold so that energy from the exhaust gases can be used for preheating fuel. A shell and tube heat exchanger is fabricated for diesel engine to recover waste heat from exhaust. Maximum fuel temperature achieved for counter flow arrangements at 50% of full load at 1440 rpm. Effectiveness of heat exchanger is found to be 81%. Waste heat recovered at 50% full load condition is found to be 72%. Turbulence promoters are useful in enhancing the heat transfer and mass flow rates in the given section. As well, Nanofluids are known to effectively improve heat transfer under turbulent flows. Turbulent flow is maintained under varying conditions of 5 – 20 m/s inlet velocity and heat carry away fluid maintained at 6 lts/ min. Enhanced heat transfer rate is observed in DI/ Ag+ NP compared to Cold Water at 50c and DI/ Alum NP nanofluids at 280C employing annular turbulence promoters embedded with inner spleen sections laterally fabricated along the Shell of the Heat Exchanger.

"Forced convective heat transfer using turbulence promoter", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 5, page no.494-501, May-2019, Available :http://www.jetir.org/papers/JETIR1905476.pdf

"Forced convective heat transfer using turbulence promoter", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp494-501, May-2019, Available at : http://www.jetir.org/papers/JETIR1905476.pdf