Library Subscription: Guest
Home Archives Officers Future meetings American Society of Thermal and Fluids Engineering
Second Thermal and Fluids Engineering  Conference

ISSN: 2379-1748
ISBN: 978-1-56700-430-4

EXPERIMENTAL INVESTIGATION ON HEAT TRANSFER AND PRESSURE DROP PERFORMANCE OF FLAT TUBE BY USING WATER BASED Al2O3 NANOFLUIDS

Gurpreet Singh
Department of Chemical Engineering Thapar University, PATIALA-147004, Punjab, INDIA

Dasaroju Gangacharyulu
Department of Chemical Engineering Thapar University, PATIALA-147004, Punjab, INDIA

V. K. Bulasara
Department of Chemical Engineering Thapar University, PATIALA-147004, Punjab, INDIA

Abstract

The aim of present study was to investigate the heat transfer and pressure drop characteristics in vertical flat tube with nanofluids experimentally. Aluminum oxide nanoparticles with average size 20 nm were used to prepare the nanofluids of different volume fractions (0.1%, 0.2% 0.3% and 0.4%) without use of any surfactant. Thermophysical properties i.e., thermal conductivity, viscosity, density over a wide range temperatures (30 °C − 65 °C ) were measured experimentally. Thermal conductivity, viscosity and density got enhanced with increase in nanofluids concentrations. The heat transfer coefficient and pressure drop were estimated for different nanofluids inlet temperatures (45 °C − 85 °C) for Reynolds number range, 10000 - 30000 while the air velocity was kept constant at 0.55 m/s. During the experimentation, it was observed that the heat transfer coefficient and pressure drop increased with increasing in Reynolds number and particle volume fraction. It was also observed that heat transfer coefficient increased with increase in fluid inlet temperatures because the viscosity and density of fluid decreased at higher temperature while pressure drop slightly decreases with increase in fluid inlet temperatures. Heat transfer coefficient increased when particle volume fraction was increased from 0.1% to 0.4% and maximum heat transfer coefficient was enhanced by 14% with using 0.4 % v/v concentration of nanofluids at Reynolds number 30000 and inlet temperature 85 °C. Pressure drop ratio was 1.4 for 0.4% v/v concentrations of Al2O3 nanoparticles.

Purchase $20.00 Check subscription Publication Ethics and Malpractice Recommend to my Librarian Bookmark this Page