Numerical investigation of thermal performance of water-Ethylene gelicol-Aluminium oxide in diesel engine radiator of automotive

Author

Abstract

In the present paper, the application of nanofluid consisting of mixture of water and ethylene glycol (as anti-freezing material) synthesized with Al2O3 nanoparticles of 28 nm size with volumetric concentrations up 2% has been numerically studied in a radiator of Chevrolet Suburban diesel engine under turbulent flow conditions. The heat transfer relations between nanofluid and airflow in the radiator have been obtained to calculate the heat transfer coefficient, overall heat transfer coefficient and pumping power for Al2O3/EG-water nanofluid circulating through the flat tubes. In the present paper, the effect of automotive speed and Reynolds number of nanofluid in the different concentrations on the performance of automotive radiator is investigated. The results show that the overall heat transfer coefficient of Al2O3/EG-water nanofluid with concentration of 2% in Renf=6000 and speed of 70 km/hr is approximately 10.63% more than that of base fluid (EG-water) for given conditions.

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