Experimental Investigation on Forced Convective Heat Transfer Coefficient of a Nano fluid

Nano fluids are used in broad range of engineering applications due to their improved thermo-physical properties such as thermal conductivity, thermal diffusivity, viscosity and convective heat transfer coefficient. In this paper Al(2)O(3)Nano fluid has been prepared by using sonicator and the size of nanoparticle is 28 nm diameters. The property changes of Nano fluids depend on the volumetric fraction of nanoparticles, shape and size of the nanomaterial. This paper presents an experimental investigation on forced convective heat transfer coefficient of a Nano fluid flowing in a single pass and multi tubes counter flow shell and tube heat exchanger under turbulent flow condition. In this we are taking different volume concentrations (0.1%, 0.2%, 0.3% and 0.4%). The results observed the heat transfer performance and characteristics of an Al(2)0(3)/water Nano fluid estimated. Heat transfer coefficient for forced convection is higher than the water at the same flow velocity and inlet temperatures of both hot and cold fluid conditions. The other properties of the Nano fluid such as its thermal conductivity, specific heat, density, and viscosity, tube diameter also calculated. (C) 2017 Elsevier Ltd. All rights reserved.