Investigation of the effect of AL2O3 nanofluid in M13NI engine cooling system

In this study, AL2O3+H2O nanofluid was used in a laboratory setting to test the thermal performance of the M13NI engine. AL2O3 nanoparticles were employed in this experiment along with base fluids made of water and ethylene glycol. We employed 20 nm nanoparticles with volume fractions of 1 to 2%. The outcomes demonstrated that the AL2O3 nanofluid made in the first 22 days was stable after being added SDBS sulphate. Additionally, the zeta potential, which was calculated to be 37.7 mv, shows the stability of the nanofluid. The heat transmission and pressure drop rose as the volume fraction of nanoparticles increased, while the merit parameter fell (ratio of heat transfer to pump power). At 1150 RPM and 1% volume fraction of nanoparticles in the water-based fluid, it was found that the heat dissipated increased by 7.2 and 13.1% in comparison to the mixture of water+ethylene glycol and pure water, respectively. When the volume proportion of nanoparticles in the base fluid increases, the radiator's outlet temperature decreases, resulting in a greater difference between the inlet and outlet temperatures and a faster rate of heat transfer. By utilizing nanofluid, it is possible to lower the radiator's size and the volume of the cooling system, so reducing the volume of circulating water and the engine's wasted power.