Experimental Study on the Heat Transfer Performance of Al₂O₃ - Ethylene Glycol/Water-Based Nanofluid as Coolant in Vehicle Radiator

In this research, the heat transfer efficiency of the vehicle radiator cooling system was experimentally investigated by mixing at different volume concentrations of an aluminum oxide (Al2O3) nanoparticle (NPs) in the regular coolant i.e. a 1:2 ratio mixture of ethylene glycol and distilled water.The sol-gel process was used to synthesize the NPs and characterized using UV-Vis spectroscopy.TATA TIAGO XZ+ was used for this investigation in an idling condition and remained motionless throughout the test.Inlet air temperature, flow rate, outlet temperature, and surface temperature were all recorded at different concentrations of NPs.Experimental results showed that the overall heat transfer coefficient of the nanofluids was improved by 33.63%, 65.4%, and 83.5% at 0.2%, 0.5%, and 1% concentrations, respectively.Thus, the results displayed that the cooling capacity can be increased with the increment of Al2O3 NPs concentration within a certain range in the normal coolant.