Experimental comparison of heat transfer coefficient and pressure drop of graphene oxide, titanium oxide and aluminum oxide on the radiator of a car

In this research, the effect of using three Nano fluids contains graphene oxide (GO), titanium oxide (TiO۲) and aluminum oxide (Al۲ O۳) was analyzed on the heat transfer of the car radiator by experiment in physical conditions on the car engine. Distilled water and ethylene glycol (۶۰:۴۰) as the base fluid was companied with three nanoparticles contain graphene oxide, titanium oxide and aluminum oxide that each one separately with ۰.۱, ۰.۲ and ۰.۳ weight percent and flow rates of ۱۰, ۲۰, ۳۲ and ۴۰ liters per minute were used at normal engine temperature. After the temperature of the radiator cooling fluid reached ۹۰ degrees Celsius and the fan was turned on for one minute, the results showed that increasing the weight percentage of nanoparticles to the base fluid increases the displacement heat transfer coefficient and most increase in the coefficient of heat transfer at ۰.۳ weight percent to an approximate value of ۵.۲% in aluminum oxide, ۱۱.۹% for titanium oxide and ۲۸.۷% for graphene oxide compared to the base fluid was received. With the increase in weight percentage, the pressure drop and Nusselt number increased.  The highest percentage increase in the radiator pressure drop for all three Nano fluids with ۰.۳ weight percentage and ۲.۲% for   aluminum oxide, ۳.۵% for Titanium oxide and ۵.۲۴% for graphene oxide were received.

کلیدواژه ها:

Heat transfer coefficient ، Car radiator ، Graphene oxide ، Nanofluid