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Bang, In Cheol
Nuclear Thermal-Hydraulics & Reactor Safety Lab
Research Interests
  • Nuclear Thermal-Hydraulics

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Effect of nanofluids on reflood heat transfer in a long vertical tube

Cited 1 times inthomson ciCited 1 times inthomson ci
Title
Effect of nanofluids on reflood heat transfer in a long vertical tube
Author
Lee, Seung WonChun, Se YoungSong, Chul HwaBang, In Cheol
Keywords
Cooling performance; Dispersion behavior; Engine oil; Enhanced cooling; Nano-colloids; Nano-fluid; Nano-sized particles; Nanofluids; Particle surface; Potential values; Reflood; Severe accident; Shape and size; Transmission electron microscopy tem; Two step method; Vertical tube
Issue Date
201208
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, v.55, no.17-18, pp.4766 - 4771
Abstract
Experiments were conducted to investigate the effect of nanofluids on reflood heat transfer in a hot vertical tube. The nanofluids, which are produced by dispersing nano-sized particles in traditional base fluids such as water, ethylene glycol, and engine oil, are expected to have a reasonable potential to enhance a heat transfer. 0.1 volume fraction (%) Al2O3/water nanofluid was prepared by two-step method and 0.1 volume fraction (%) carbon nano colloid (CNC) was prepared by the process self-dispersing by carboxyl formed particle surface. Transmission electron microscopy (TEM) images are acquired to characterize the shape and size of Al2O3 and graphite nanoparticles. The dispersion behavior of nanofluids was investigated with zeta potential values. And then, the reflood tests have been performed using water and nanofluids. We have observed a more enhanced cooling performance in the case of the nanofluid reflood. Consequently, the cooling performance is enhanced more than 13 s and 20s for Al2O3/water nanofluid and CNC.
URI
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DOI
http://dx.doi.org/10.1016/j.ijheatmasstransfer.2012.04.041
ISSN
0017-9310
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