Experimental analysis of the effect of using aluminum oxide nanofluid in improving the heat transfer of XU7 engine radiator

In this research, an experimental analysis of the effect of using aluminum oxide nanofluid (Al2O3) in improving the heat transfer of the engine radiator (XU7) with complete cooling system equipment was done. Tests in three pure water conditions; water and ethylene glycol (60:40) and finally with aluminum oxide nanofluid (Al2O3) with volume fractions of 1% and 2% and flow rates of 10, 21, and 32 liters per minute, in two slow and fast cycles. The cooling fan is done. The results showed that increasing the volume fraction of nanoparticles to the base fluid increases the heat transfer coefficient up to a flow rate of 21 liters per minute, and after that this coefficient decreases. By adding 2 percent by volume of nanoparticles to the base fluid at high fan speed, for flow rates of 10, 21, and 32 Lit/min, respectively, we see an approximate increase of 3%, 20%, and 16% in the displacement heat transfer coefficient compared to the base fluid. The pressure drop of the radiator with a volume fraction of 1 and 2% compared to the base fluid at a constant flow rate of 30 liters per minute was calculated as 22% and 40.8%, respectively.