Experimental Investigation of Heat Transfer Enhancement using MgO-Water Nanofluid in Tube

Abstract

Experimental and numerical investigation has been carried out to find out the effect of MgO-water nanofluid of different diameter nanoparticles at various concentrations on heat transfer. For this purpose nanofluid containing MgO nanoparticles of different sizes (7nm, 40nm, 60nm and 100) are suspended in to base fluid (water) at various concentrations (0.005%, 0.01%, 0.05% and 0.1%).Thermo physical properties of nanofluid are measured experimentally because tradition correlation underestimates the thermo physical parameters. Addition of nanoparticles increases heat transfer rate but this is up to certain limit further addition of nanoparticles in nanofluid affect heat transfer rate. Optimized volume fraction is 0.01%. Nanofluid with 0.01% volume fraction and smaller particles diameter gives highest Nusselt number.