A dry-spot model of critical heat flux applicable to both pool boiling and subcooled forced convection boiling
A study has been performed to predict CHF in pool boiling and subcooled forced convection boiling using the dry-spot model presented by the authors and existing correlations for heat transfer coefficient, active site density and bubble departure diameter in nucleate boiling. Comparisons of the model predictions with experimental data for pool boiling of water and subcooled upward forced convection boiling of water in vertical, uniformly-heated round tubes have been performed and the parametric trends of CHF have been investigated. The results of the present study strongly support the validity of physical feature of the present model on the CHF mechanism in pool boiling and subcooled forced convection boiling. To improve the prediction capability of the present model, further works on active site density, bubble departure diameter and suppression factor in subcooled boiling are needed.
- Research Organization:
- Korea Electric Power Research Inst., Taejon (KR)
- OSTI ID:
- 20002510
- Report Number(s):
- CONF-990805--
- Country of Publication:
- United States
- Language:
- English
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