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Research Papers

Comparative Study of Cooling Performance of Automobile Radiator Using Al2O3-Water and Carbon Nanotube-Water Nanofluid

[+] Author and Article Information
Sandesh S. Chougule

Research Scholar
Discipline of Mechanical Engineering,
Indian Institute of Technology, Indore,
Indore, Madhya Pradesh 453446, India
e-mail: sandesh_chougule@yahoo.com

S. K. Sahu

Mem. ASME
Assistant Professor
Discipline of Mechanical Engineering,
Indian Institute of Technology, Indore,
Indore, Madhya Pradesh 453446, India
e-mail: sksahu@iiti.ac.in

1Corresponding author.

Manuscript received January 13, 2014; final manuscript received February 20, 2014; published online March 17, 2014. Assoc. Editor: Calvin Li.

J. Nanotechnol. Eng. Med 5(1), 010901 (Mar 17, 2014) (6 pages) Paper No: NANO-14-1002; doi: 10.1115/1.4026971 History: Received January 13, 2014; Revised February 20, 2014

In the present study, the forced convective heat transfer performance of two different nanofluids, namely, Al2O3-water and CNT-water has been studied experimentally in an automobile radiator. Four different concentrations of nanofluid in the range of 0.15–1 vol. % were prepared by the additions nanoparticles into the water as base fluid. The coolant flow rate is varied in the range of 2 l/min–5 l/min. Nanocoolants exhibit enormous change in the heat transfer compared with the pure water. The heat transfer performance of CNT-water nanofluid was found to be better than Al2O3-water nanocoolant. Furthermore, the Nusselt number is found to increase with the increase in the nanoparticle concentration and nanofluid velocity.

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Figures

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Fig. 2

(a) The fin and flat tube of the automobile radiator and (b) stadium-shape of the radiator flat tube

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Fig. 1

Schematic diagram of the test facility

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Fig. 6

Comparison of Nusselt number variation for nanocoolant at 0.15 vol. %

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Fig. 7

Comparison of Nusselt number variation for nanocoolant at 1 vol. %

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Fig. 3

Variation of thermal conductivity ratio with temperature for nanofluid with different volume concentrations (a) CNT-water nanofluid and (b) Al2O3-water nanofluid

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Fig. 4

Variation of absolute viscosity with temperature at different volume concentration

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Fig. 5

Variation of Nusselt number of pure water with existing correlations

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Fig. 8

Variation of thermal performance for different nanoparticle concentration

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