Calculation of Steam Volume Fraction in Subcooled Boiling

[+] Author and Article Information
S. Zia Rouhani

Section for Thermal Design of Reactors, Aktiebolaget Atomenergi, Stockholm, Sweden

J. Heat Transfer 90(1), 158-164 (Feb 01, 1968) (7 pages) doi:10.1115/1.3597447 History: Received September 23, 1966; Online August 25, 2011


An analysis of subcooled boiling is presented. It is assumed that heat is removed by vapor generation, heating of the liquid that replaces the detached bubbles, and to some extent by single-phase heat transfer. Two regions of subcooled boiling are considered and a criterion is provided for obtaining the limiting value of subcooling between the two regions. Condensation of vapor in the subcooled liquid is analyzed and the relative velocity of vapor with respect to the liquid is neglected in these regions. The theoretical arguments result in some equations for the calculation of steam volume fraction and true liquid subcooling.

Copyright © 1968 by ASME
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