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http://dx.doi.org/10.3795/KSME-B.2010.34.12.1093

A Study on the Thermal-Hydraulic Characteristics of Molten Salt in Minichannels of an Intermediate Heat Exchanger for a Very High Temperature Reactor (VHTR)  

Jeong, Hui-Seong (Dept. of Refrigeration and Air-Conditioning Engineering, Korea Maritime Univ.)
Hwang, In-Seon (Dept. of Refrigeration and Air-Conditioning Engineering, Korea Maritime Univ.)
Bang, Kwang-Hyun (Dept. of Mechanical Engineering, Korea Maritime Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.34, no.12, 2010 , pp. 1093-1099 More about this Journal
Abstract
For Very High Temperature Reactors (VHTR), the designs of the Intermediate Heat Transport Loop (IHTL) and the Intermediate Heat Exchanger (IHX) are particularly difficult because of the high-temperature operation (up to $950^{\circ}C$). In this study, Flinak molten salt, a eutectic mixture of LiF, NaF, and KF (46.5:11.5:42.0 mole %) is considered as the heat transporting fluid in the IHTL. To evaluate the flow and heat transfer performance of the Flinak molten salt in small channels with hydraulic diameters in the millimeter range, a double-pipe heat exchanger was constructed using small-diameter tubes for the heat exchange between the Flinak and the gas flow. The experimental data showed that, for laminar Flinak flow, the measured friction factors were close to the 64/Re curve and the Nusselt numbers were generally between 3.66 and 4.36.
Keywords
VHTR; Heat Exchanger; Molten Salt;
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