Heat transfer performance for high prandtl and high temperature molten salt flow in sphere-packed pipes

Tomoaki Satoh, Kazuhisa Yuki, Shin Ya Chiba, Hidetoshi Hashizume, Akio Sagara

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Heat transfer performance for high Prandtl number and high temperature molten salt flow in a circular pipe and in sphere-packed pipes are evaluated with modified Tohoku-NIFS Thermofluid Loop (TNT loop) using high-temperature molten salt HTS (KNO3 : NaNO2 : NaNO3 = 53 : 40 : 7), as a stimulant of Flibe (LiF : BeF2 = 66 : 34). The modified TNT loop has much longer entrance region to develop a thermal boundary layer, which enable us to obtain more precise heat transfer data. In the modified TNT loop experiments, the heat transfer characteristics in a circular pipe flow have good agreements with the representative correlations. It is obvious that the analogy for heat and momentum transfer is also valid for high-temperature and high-Prandtlnumber molten salt flow. It is also confirmed that the heat transfer performance of sphere-packed pipes increases up to about 4 times higher than that of circular pipe, in case of relatively low flow rate. This can be effective in the Flibe blanket system from the viewpoints of moderating MHD effect and electrolysis.

Original languageEnglish
Pages (from-to)618-624
Number of pages7
JournalFusion Science and Technology
Volume52
Issue number3
DOIs
Publication statusPublished - 2007 Oct

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Mechanical Engineering

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