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Science and Technology of Nuclear Installations
Volume 2014, Article ID 279791, 8 pages
http://dx.doi.org/10.1155/2014/279791
Research Article

Heat Transfer Analysis of Passive Residual Heat Removal Heat Exchanger under Natural Convection Condition in Tank

School of Mechanical and Power Engineering, East China University of Science and Technology, Room 637, Building 17, 130 Meilong Road, Shanghai 200237, China

Received 15 May 2014; Revised 3 November 2014; Accepted 3 November 2014; Published 20 November 2014

Academic Editor: Borut Mavko

Copyright © 2014 Qiming Men et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Aiming at the heat transfer calculation of the Passive Residual Heat Removal Heat Exchanger (PRHR HX), experiments on the heat transfer of C-shaped tube immerged in a water tank were performed. Comparisons of different correlation in literatures with the experimental data were carried out. It can be concluded that the Dittus-Boelter correlation provides a best-estimate fit with the experimental results. The average error is about 0.35%. For the tube outside, the McAdams correlations for both horizontal and vertical regions are best-estimated. The average errors are about 0.55% for horizontal region and about 3.28% for vertical region. The tank mixing characteristics were also investigated in present work. It can be concluded that the tank fluid rose gradually which leads to a thermal stratification phenomenon.