| Comparative study on heat transfer characteristics of nanofluidic thermosyphon and grooved heat pipe Dong-Ryun Shin, Seok-Ho Rhi*, Taek-Kyu Lim and Ju-Chan Jang
The Journal of Mechanical Science and Technology, vol. 25, no. 6, pp.1391-1398, 2011
Abstract : The present study used TiO2-nanofluid with different volume ratios as the working fluids of a therrmosyphon and grooved heat pipe
and investigated various parameters such as volume concentration of nanoparticles, orientation, heat flux, and cooling media. Further, the
present study used nanofluids and dispersed TiO2-nanoparticles into pure water with each cross-blended concentration of 0.05%, 0.1%,
0.5%, and 1%. The authors observed the best heat transfer performance in the 0.05% concentration with thermosyphon. The present
study presents the enhancement of heat transfer performance with TiO2-nanofluids, and fabricated a heat pipe from a straight stainless
steel tube with an outer diameter and length of 10 and 500 mm, respectively. At the optimum condition for the pure refrigerant, the thermosyphon
with 0.05% TiO2-nanoparticle concentration gave 1.40 times higher efficiency than that of pure water.
Keyword :
Heat pipe; Thermosyphon; Nanofluids; Heat transfer
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