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Research Papers

Heat Transfer Enhancement Characteristics of Al2O3/Water and CuO/Water Nanofluids in a Tube in Tube Condenser Fitted With an Air Conditioning System—An Experimental Comparison

[+] Author and Article Information
V. Chandraprabu

Assistant Professor
Department of Mechanical Engineering,
K. S. Rangasamy College of Technology,
Tiruchengode - 637251 Tamil Nadu, India
e-mail: vchandraprabu@gmail.com

G. Sankaranarayanan

Professor
Department of Mechanical Engineering,
Sri Muthukumaran Institute of Technology,
Chennai, Tamil Nadu, India
e-mail: gs2000narayanan@gmail.com

S. Iniyan

Professor
Department of Mechanical Engineering,
Anna University,
Chennai, Tamil Nadu, India
e-mail: iniyan777@hotmail.com

S. Suresh

Assistant Professor
Department of Mechanical Engineering,
National Institute of Technology,
Trichy, Tamil Nadu, India
e-mail: ssuresh@nitt.edu

1Corresponding author.

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS. Manuscript received April 23, 2013; final manuscript received March 23, 2014; published online May 9, 2014. Assoc. Editor: Bengt Sunden.

J. Thermal Sci. Eng. Appl 6(4), 041004 (May 09, 2014) (5 pages) Paper No: TSEA-13-1071; doi: 10.1115/1.4027396 History: Received April 23, 2013; Revised March 23, 2014

In this study, heat transfer performance of nanofluids (Al2O3/water and CuO/water nanofluid) is experienced by using the condensing unit of an air conditioner. Nanoparticles at 30 nm are suspended at various volume concentrations (1%, 2%, 3%, and 4%) in the base fluid are produced for this current work. The nanofluids, considered as a cooling fluid, flow in the outer side of the tube of condenser, and general working condition of the air conditioner is applied for the investigation. Experimental results highlight the enhancement of heat transfer rate because of the existence of nanoparticles in the fluid. Two nanofluids show better heat transfer rate than does the base fluid. The Nusselt numbers for CuO/water and Al2O3/water nanofluids are enhanced up to 39.48% and 33.86%, respectively. The findings show that CuO/water nanofluids exhibit better heat transfer rate than Al2O3/water nanofluids.

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Figures

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Fig. 1

(a) Layout of experimental setup. (b) Photography of experimental setup.

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Fig. 2

Nusselt number versus Reynolds number for pure distilled water

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Fig. 3

Heat transfer coefficient of Al2O3/water nanofluid and water versus Reynolds number

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Fig. 4

Heat transfer coefficient of CuO/water nanofluid and water versus Reynolds number

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Fig. 5

Comparison of Nusselt number of Al2O3/water nanofluid and CuO/water nanofluid versus Reynolds number

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