International Journal of Thermophysics

, Volume 12, Issue 5, pp 769–781

The thermal conductivity of molten NaNO3 and KNO3

  • Y. Nagasaka
  • A. Nagashima

DOI: 10.1007/BF00502404

Cite this article as:
Nagasaka, Y. & Nagashima, A. Int J Thermophys (1991) 12: 769. doi:10.1007/BF00502404


The thermal conductivity data for molten NaNO3 and KNO3 have been examined in order to propose recommended data sets for these two popular heat carriers and to establish the reference values above the temperature range covered by toluene and water. It is known that the measurement of the thermal conductivity of molten salts is very difficult, owing mainly to their corrosiveness and high melting temperatures, which introduce complications in apparatus design and significant systematic errors due to radiation and convection. However, some recent measurements seem to manifest more trustworthy values than obtained before. All available data have been collected and critically evaluated. The temperature range covered is 584 to 662 K for molten NaNO3 and 662 to 712 K for molten KNO3, with the confidence limits better than ± 5%.

Key words

molten salts potassium nitrate (KNO3sodium nitrate (NaNO3thermal conductivity 

Copyright information

© Plenum Publishing Corporation 1991

Authors and Affiliations

  • Y. Nagasaka
    • 1
  • A. Nagashima
    • 1
  1. 1.Department of Mechanical EngineeringKeio UniversityYokohamaJapan

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