Performance Evaluation of Internal Combustion Engine by using MWCNT/Water based Nanofluid as a Coolant

The implications of Internal Combustion (IC) Engines are complex now a day in a fast living technical field. Much work have been done on IC engines to enhance their performances with engine modification, alternate fuels, fuel supply system, combustion system and cooling systems. However every trial has its own merits and demerits. In particular, reaching the limit of conventional coolants. In this investigation, so called novel fluids MWCNT nanofluids at 0.1, 0.3, and 0.5%volume concentration are taken as IC engine coolant to study its performances and compare with the performances of water. The test is performed at five electrical loadings and by keeping flow rate of coolant 300 LPH as constant. It is found that the mechanical efficiency is enhanced by 13 to 24%, the Break thermal efficiency increases by 9-21%, the TFC reduces 9-19%, and the exhaust temperature of the engine decreases by 5-10% at 0.3% vol. concentration of nanofluids. The 0.3% nanofluids found to have better performance while compared with water at the same engine conditions.