Abstract
The research on the boiling heat transfer of liquid metals is important in connection with the safety of sodium-cooled FBRs, and the boiling of sodium in fuel assemblies has been frequently taken up as a practical problem. However, in order to clarify the basic characteristics of boiling heat transfer, it is necessary to sufficiently study on pool boiling. The boiling point at 1 atm is 360 deg C in mercury, 760 deg C in potassium and 880 deg C in sodium, and it is necessary to adopt indirect heating method because it is undesirable that electric current flows in liquid metals. Purity control must be applied to liquid metals, and cover gas is used on the free surface for preventing the oxidation. Generally, it is difficult to visually observe the boiling of liquid metals, but an example of the diagnostic method is shown. The temperature of a heating surface, liquid temperature, the sound accompanying boiling, the behavior of bubbles near the heating surface were measured, and the boiling curves and the heat flux vs. sound intensity curves were obtained. The boiling heat transfer of sodium is briefly explained, and that of potassium is reported in detail. (Kako, I.).
Citation Formats
Michiyoshi, Itaru.
Boiling heat transfer of liquid metals.
Japan: N. p.,
1984.
Web.