Numerical simulation analysis of heat transfer characteristics of steam condensation in the presence of air outside a small-diameter tube bundle

被引：0
作者：
Song D. [1 ,2 ]
Sun Z. [1 ,2 ]
Zhang N. [1 ,2 ]
Feng Y. [1 ,2 ]
Mao Y. [3 ]
Peng X. [1 ,2 ]
机构：
[1] College of Nuclear Science and Technology, Harbin Engineering University, Harbin
[2] Heilongjiang Provincial Key Laboratory of Nuclear Power System & Equipment, Harbin Engineering University, Harbin
[3] China Nuclear Power Engineering Co., Ltd., Beijing
来源：
Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | 2023年 / 44卷 / 07期
关键词：
C-shaped tube bundle; column number of tube bundle; heat transfer coefficient; non-condensable gas; numerical simulation; small tube diameter; steam condensation; tube spacing;
D O I：
10.11990/jheu.202303057
中图分类号：
学科分类号：
摘要：
To address the issue of high-efficiency heat removal from air-steam condensation, the numerical simulation analysis of the heat transfer characteristics of steam condensation outside a small-diameter tube bundle was performed via computational fluid dynamics. A tube bundle with different structures was modeled, and a typical tube bundle structure with tube diameter d and three rows of multiple columns of tube bundle was comprehensively analyzed. At a small tube spacing (≤2d), the superposition effect of the air layer was the key factor affecting the condensation-based heat transfer in the small tube bundle, and the condensation heat transfer coefficient (CHTC) was slightly lower than that of the large-diameter tube bundle and significantly lower than that of the single tube. Under a large tube spacing (>2d), the suction effect was the main controlling factor, resulting in a higher CHTC for the small-diameter tube bundle than the large-diameter tube bundle, and the CHTC of the small-diameter tube bundle exceeded that of a single tube, thereby strengthening the heat transfer effect. The structural arrangement of the tube bundle also significantly influenced the heat transfer characteristics of air-steam condensation. © 2023 Editorial Board of Journal of Harbin Engineering. All rights reserved.
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页码：1227 / 1233
页数：6
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