Wall temperature prediction in annular geometry during post-dryout heat transfer
Abstract
In this paper a new approach to predict wall temperature during post-dryout heat transfer in annuli with flow obstacles is presented. The proposed approach takes into account the obstacle specifics and location in the channel to determine the onset of post-dryout patch. The wall temperature in the dry patch area is predicted from a correlation that is taking into account the developing post-dryout heat transfer regime. The method is applied to post-dryout conditions in annulus with pin-spacers and a significant improvement of prediction accuracy in comparison to other reference methods is demonstrated.References
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[2] Anghel I.G., Anglart H.: Post-dryout heat transfer to high-pressure water flowing upward in vertical channels with various flow obstacles. Int. J. Heat Mass Transfer 55, pp. 8020-8031, 2012.
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[6] Anghel I.G., Anglart H.: On post-dryout heat transfer in channels with flow obstacles. Accept. Nucl. Eng. Des. 2014.
[2] Anghel I.G., Anglart H.: Post-dryout heat transfer to high-pressure water flowing upward in vertical channels with various flow obstacles. Int. J. Heat Mass Transfer 55, pp. 8020-8031, 2012.
[3] Groeneveld D.C., Post-dryout heat transfer at reactor operating conditions. AECL-4513, 1973.
[4] Saha P., A nonequilibrium heat transfer model for dispersed droplet post-dryout regime. Int. J. Heat Mass Transfer 23, pp. 438-492, 1980.
[5] Cohen J.C.: Correlation for boiling heat transfer to saturated fluids in convective flows. Eng. Chem. Des. Dev. 5(3), pp. 322-339, 1966.
[6] Anghel I.G., Anglart H.: On post-dryout heat transfer in channels with flow obstacles. Accept. Nucl. Eng. Des. 2014.
Published
2015-01-01
How to Cite
ANGHEL, Ionut G.; ANGLART, Henryk.
Wall temperature prediction in annular geometry during post-dryout heat transfer.
Journal of Power Technologies, [S.l.], v. 94, n. 5, p. 1--7, jan. 2015.
ISSN 2083-4195.
Available at: <https://papers.itc.pw.edu.pl/index.php/JPT/article/view/586>. Date accessed: 22 dec. 2024.
Section
Nuclear Power
Keywords
Post-dryout; Obstacle effect; Annular geometry; Heat transfer
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