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Research Papers

Performance Investigation of an Automotive Car Radiator Operated With Nanofluid as a Coolant

[+] Author and Article Information
Durgeshkumar Chavan

Associate Professor
Mechanical Engineering Department,
Rajarambapu Institute of Technology,
Rajaramnagar, Maharshtra 415414, India
e-mail: dscrit@gmail.com

Ashok T. Pise

Professor and Head
Mechanical Engineering Department,
Government College of Engineering,
Karad, Maharashtra 415124, India
e-mail: ashokpise@yahoo.com

Manuscript received May 9, 2013; final manuscript received August 1, 2013; published online December 27, 2013. Assoc. Editor: Samuel Sami.

J. Thermal Sci. Eng. Appl 6(2), 021010 (Dec 27, 2013) (5 pages) Paper No: TSEA-13-1081; doi: 10.1115/1.4025230 History: Received May 09, 2013; Revised August 01, 2013

Nanofluids are suspensions of metallic or nonmetallic nanopowders in base liquid and can be employed to increase heat transfer rate at various applications. In the present study, forced convective heat transfer in an Al2O3/water nanofluid has experimentally been compared to that of pure water in automobile radiator. Five different concentrations of nanofluids in the range of 0–1.0 vol. % have been prepared by the addition of Al2O3 nanoparticles into the water. The test fluid flows through the automobile radiator consisted of 33 vertical tubes with elliptical cross section and air makes a cross flow inside the tube bank with constant speed. The test fluid flow rate has been changed in the range of 3 l/min to 8 l/min to have fully turbulent regime. Obtained results demonstrate that increasing the fluid circulating rate can improve the heat transfer performance. The application of the nanofluid with low concentration can enhance heat transfer efficiency up to 40–45% in comparison with pure water. The increase in heat transfer coefficient due to presence of nanoparticles is higher than the prediction of single phase heat transfer Dittus Boelter correlation used with nanofluid properties. These results can be implemented to optimize the size of an automobile radiator.

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Figures

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Fig. 1

Experimental setup

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Fig. 6

Effect of volume concentration on physical properties of nanofluids

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Fig. 5

Comparison of Experimental Nusselt number with predicted Nusselt number by correlations

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Fig. 4

Nusselt number for different volume concentration of nanofluid and Re number

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Fig. 3

Heat transfer coefficient enhancement for different volume concentration of nanofluid and Re number

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Fig. 2

Comparison between experimental result and results by Dittus Boelter and Seidar Tate correlation for water with inlet temperature of 45  °C

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