Analyzing the thermal performance of radiator using nanoparticles of Al2SiO5 immersed nanofluids.

This paper compares the thermal behavior of Ethylene Glycol (EG) and nano particles of Al₂SiO₅ immersed water based cutting fluid as coolants experimentally for the application of radiator used in automobile. In this regard, forced convective heat transfer coefficient has been equated for base fluid i.e. EG and water-based nanoparticles (NPs) of Al₂SiO₅ immersed nanofluids (NFs). For NFs, nano particles of Al₂SiO₅ have been mixed at concentration of 0.1%, 0.2%, 0.3% and 0.4% considering the vol% /vol%. The base fluid has been prepared by mixing the 40% EG and 60% pure water based on vol% / vol%. To have a laminar flow, all the experiments have been performed for Reynolds number ranging from 500 to 1500. For all experimental trials, the NFs were allowed to flow across the tubes of radiator made in elliptical cross section. Besides, the air is allowed to pass at constant speed in the direction of perpendicular to the flow of coolant at the passage between the tube bundles. The obtained experimental results suggest that the increment in flow rate can enhance the heat transfer. However, negligible impact has been observed for the change in inlet temperature of radiator. The increment in heat transfer upto 47% has been observed when NPs having low concentration has been immersed in base fluid. To compare the heat transfer, a non-dimensional coefficient of heat transfer i.e. Nusselt Number (Nu) has been calculated. [ABSTRACT FROM AUTHOR]