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Research Papers

Thermal Performance of Automobile Radiator Using Carbon Nanotube-Water Nanofluid—Experimental Study

[+] Author and Article Information
Sandesh S. Chougule

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

S. K. Sahu

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

1Corresponding author.

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS. Manuscript received December 19, 2013; final manuscript received April 21, 2014; published online June 3, 2014. Assoc. Editor: Zahid Ayub.

J. Thermal Sci. Eng. Appl 6(4), 041009 (Jun 03, 2014) (6 pages) Paper No: TSEA-14-1008; doi: 10.1115/1.4027678 History: Received December 19, 2013; Revised April 21, 2014

In the present study, the convective heat transfer enhancement of carbon nanotube (CNT)-water nanofluid has been studied experimentally inside an automobile radiator. Heat removal rate of the coolant flowing through the automobile radiators is of great importance for the optimization of fuel consumption. In this study, four different concentrations of nanofluids in the range of 0.15–1 vol. % were prepared with the addition of CNT nanoparticles into water. The CNT nanocoolants are synthesized by functionalization (FCNT) and surface treatment (SCNT) method. The effects of various parameters, namely synthesis method, variation in pH values and nanoparticle concentration on the Nusselt number are examined through the experimental investigation. Results demonstrate that both nanocoolants exhibit enormous change Nusselt number compared with water. The results of functionalized CNT nanocoolant with 5.5 pH exhibits better performance compared to the nanocoolant with pH value of 6.5 and 9. The surface treated CNT nanocoolant exhibits the deterioration in heat transfer performance. In addition, Nusselt number found to increase with the increase in the nanoparticle concentration and nanofluid velocity.

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References

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Figures

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Fig. 1

SEM image at magnification of 10,000 × of CNT particles

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Fig. 2

Schematic of experimental setup

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Fig. 3

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

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Fig. 4

Variation of Nusselt number for pure water with existing correlations

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Fig. 5

Effect of pH Variation on nanocoolant heat transfer performance

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Fig. 6

Effect of synthesis method on nanocoolant heat transfer performance

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Fig. 7

Nusselt number variation for different nanoparticle concentration nanocoolant

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