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Received October 5, 2007
Accepted March 5, 2008
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Effect of alumina nanoparticles in the fluid on heat transfer in double-pipe heat exchanger system
Department of Chemical and Biological Engineering, Applied Rheology Center, Korea University, Seoul 136-701, Korea
kimsh@korea.ac.kr
Korean Journal of Chemical Engineering, September 2008, 25(5), 966-971(6), 10.1007/s11814-008-0156-5
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Abstract
Abstract.This study was performed to investigate the convective heat transfer coefficient of nanofluids made of several alumina nanoparticles and transformer oil which flow through a double pipe heat exchanger system in the laminar flow regime. The nanofluids exhibited a considerable increase of heat transfer coefficients. Although the thermal conductivity of alumina is not high, it is much higher than that of the base fluids. The nanofluids tested displayed good thermal properties. One of the possible reasons for the enhancement on heat transfer of nanofluids can be explained by the high concentration of nanoparticles in the thermal boundary layer at the wall side through the migration of nanoparticles. To understand the enhancement of heat transfer of nanofluid, an experimental correlation was proposed for an alumina-transformer oil nanofluid system.
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References
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Eastman JA, Choi SUS, Li S, Yu W, Thomson LJ, Appl. Phys. Lett., 78, 718 (2001)
Xie H, Wang J, Xi TG, Liu Y, Ai F, J. Appl. Phys., 91, 4568 (2002)
Cho TH, Park SD, Lee YS, Baek IH, Korean Chem. Eng. Res., 42(5), 624 (2004)
Xuan Y, Li Q, ASME J. Heat Transfer, 125, 151 (2003)
Roy G, Nguyen CT, Lajoie PR, Superlattices Microstruct., tures, 35, 497 (2004)
Wen DS, Ding YL, Int. J. Heat Mass Transf., 47(24), 5181 (2004)
Yang Y, Zhang ZG, Grulke EA, Anderson WB, Wu GF, Int. J. Heat Mass Transf., 48(6), 1107 (2005)
Lee CH, Kang SW, Kim SH, J. Ind. Eng. Chem., 11(1), 152 (2005)
Keblinski P, Phillpot SR, Choi SUS, Eastman JA, Int. J. Heat Mass Transf., 45(4), 855 (2002)
Jang SP, Choi SUS, Appl. Phys. Lett., 84, 4316 (2004)
Xuan YM, Roetzel W, Int. J. Heat Mass Transf., 43(19), 3701 (2000)
Khanafer K, Vafai K, Lightstone M, Int. J. Heat Mass Transf., 46(19), 3639 (2003)
Pansanga K, Mekasuwandumrong O, Panpranot J, Praserthdam P, Korean J. Chem. Eng., 24(3), 397 (2007)
Monrad CC, Pelton JF, Trans. Am. Inst. Chem. Eng., 38, 593 (1942)
Li Q, Xuan Y, Science in China E, 45, 408 (2002)
Kang HU, Kim SH, Oh JM, Exp. Heat Transf., 19(3), 181 (2006)
Ding WL, Wen DS, Powder Technol., 149(2-3), 84 (2005)
