Experimental evaluation on the convective heat transfer enhancement of Alumina/DI water nanofluid in a shell-tube heat exchanger

Publish Year: 1395
نوع سند: مقاله کنفرانسی
زبان: English
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CHCONF02_083

تاریخ نمایه سازی: 9 مرداد 1395

Abstract:

This article reports an experimental study on the forced convective heat transfer and flow characteristics of a nanofluid consisting of deionized water and different volume concentration of γ-Al2O3 nanofluid (0.025, 0.05 and 0.1) flowing inside a horizontal shell and tube heat exchanger counter flow under transient and turbulent flow conditions are investigated. First, alumina nanoplate with the hydrothermal method was synthesized and then Analysis of the pattern of X-ray diffraction (XRD) and scanning electron microscope (SEM) on them were conducted. The γ-Al2O3/water nanofluid was produced by the tow-step synthesis method with cationic chitosan dispersant served as the experimental sample, and was dispersed into different volume concentrations. Particle size distributions for a range of nanofluids are measured by dynamic light scattering (DLS).The results indicate that the convective heat transfer coefficient of nanofluid is slightly higher than that of the base fluid at same mass flow rate and at same inlet temperature. The heat transfer coefficient increases by increasing the volume concentration of nanoparticles in nanofluid, also the heat transfer coefficient of the nanofluid increases with an incease in the mass flow rate.

Authors

saman Delavarizadeh

Student M.Sc of Chem. Eng., Faculity of Engineering Tehran North Branch, Azad University, Tehran

Ali Morad Rashidi

Associated Professor,Nanotechnology Research Center,Research Institute of Petroleum Industry, Tehran

Mohammad Samipourgiri

assistant professor, Faculity of Engineering Tehran North Branch, Islamic Azad University, Tehran

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