This paper is mainly concerned about the pool boiling heat transfer behavior of multiwalled carbon nanotube (CNT) suspensions in water and water containing 9.0% by weight of sodium lauryl sulfate anionic surfactant (SDS) has been carried out. Three different concentrations of 0.25%, 0.5%, and 1.0% by volume of CNT in base fluids, i.e., water and water containing 9.0% by weight of sodium lauryl SDS, were prepared and boiling experiments were conducted over a 115 mm long stainless steel horizontal tube heater of 9.0 mm outer diameter and 0.5 mm thickness. The test results show that the addition of carbon nanotubes increases the boiling heat transfer coefficient of base fluids. The enhancement of heat transfer coefficient was found at 1.75, 1.2, and 1.2 folds corresponding to 0.25%, 0.5%, and 1.0% concentration of CNT by volume in water at the critical heat flux of , , and , respectively. It was also observed that the enhancement factor was higher for lower heat fluxes, which decrease for higher heat fluxes. And also, the heat transfer coefficient enhancement in the water-CNT-surfactant nanofluids of 0.25%, 0.5%, and 1.0% of CNT concentrations are found to be 1.13, 1.44, and 1.5 times that of water at the critical heat fluxes of , , and , respectively. Foaming was found over the free surface of all water-CNT-surfactant nanofluids during the boiling experiments. Furthermore, it was observed that there was no fouling over the test-section. For further confirmation, however, a long term study needs to be carried out.
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June 2009
Invited Papers
Pool Boiling Characteristics of Carbon Nanotube Based Nanofluids Over a Horizontal Tube
R. Kathiravan,
R. Kathiravan
Department of Mechanical and Industrial Engineering,
Indian Institute of Technology
, Roorkee 247 667, India
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R. Kumar,
R. Kumar
Department of Mechanical and Industrial Engineering,
e-mail: ravikfme@iitr.ernet.in
Indian Institute of Technology
, Roorkee 247 667, India
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A. Gupta,
A. Gupta
Department of Mechanical and Industrial Engineering,
Indian Institute of Technology
, Roorkee 247 667, India
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R. Chandra,
R. Chandra
Institute Instrumentation Centre,
Indian Institute of Technology
, Roorkee 247 667, India
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P. K. Jain
P. K. Jain
Centre for Carbon Materials,
International Advanced Research Centre for Powder Metallurgy and New Materials
, Hyderabad 500005, India
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R. Kathiravan
Department of Mechanical and Industrial Engineering,
Indian Institute of Technology
, Roorkee 247 667, India
R. Kumar
Department of Mechanical and Industrial Engineering,
Indian Institute of Technology
, Roorkee 247 667, India
e-mail: ravikfme@iitr.ernet.in
A. Gupta
Department of Mechanical and Industrial Engineering,
Indian Institute of Technology
, Roorkee 247 667, India
R. Chandra
Institute Instrumentation Centre,
Indian Institute of Technology
, Roorkee 247 667, India
P. K. Jain
Centre for Carbon Materials,
International Advanced Research Centre for Powder Metallurgy and New Materials
, Hyderabad 500005, India
J. Thermal Sci. Eng. Appl. Jun 2009, 1(2): 022001 (7 pages)
Published Online: September 16, 2009
Article history
Received:
June 14, 2009
Revised:
August 17, 2009
Published:
September 16, 2009
Citation
Kathiravan, R., Kumar, R., Gupta, A., Chandra, R., and Jain, P. K. (September 16, 2009). "Pool Boiling Characteristics of Carbon Nanotube Based Nanofluids Over a Horizontal Tube." ASME. J. Thermal Sci. Eng. Appl. June 2009; 1(2): 022001. https://doi.org/10.1115/1.4000042
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