Experimental research on natural circulation CHF in narrow rectangular channels

被引：0
|
作者：
Zhou T. [1 ,2 ]
Chen N. [2 ,3 ]
Yao Y. [1 ,2 ]
Xu P. [2 ,3 ]
Jiang Y. [2 ,3 ]
Chen J. [2 ,3 ]
机构：
[1] School of Energy and Environment, Southeast University, Nanjing
[2] Institute of Nuclear Thermal-hydraulic Safety and Standardization, Nanjing
[3] School of Nuclear Science and Engineering, North China Electric Power University, Beijing
来源：
Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | 2024年 / 45卷 / 05期
关键词：
BP neural network; CHF; exit temperature; mass flow rate; narrow rectangular channel; natural circulation; outlet dry⁃ ness; small reactor;
D O I：
10.11990/jheu.202107018
中图分类号：
学科分类号：
摘要：
To address the problem of high power in the heat exchange process of narrow rectangular channels and apply it in small reactors, a small, narrow rectangular natural circulation channel was built for the experiment. The BP neural network method predicts the experimental data and analyzes the variation of critical heat flux with differ⁃ ent parameters under different conditions and the influence of different parameters on critical heat flux. Results re⁃ vealed that the influence of mass flow and system pressure on (critical heat flux density) CHF points was positively correlated, outlet dryness and CHF were negatively correlated, the influence of mass flow on CHF was the greatest, and the influence of pressure on CHF was the smallest. Using relevant experimental data and considering the size of the influencing factors, a model for naturally circulated small piles in a narrow channel was established based on the BP neural network. The predicted value of the BP neural network algorithm was agreed with the experimental val⁃ ue, with an error of 10%; the Katto model has a large error compared with the experimental data, and the error be⁃ tween the Zhang and fitting formulas is small. The established CHF model can be used as the calculation formula for critical heat flux density in the natural circulation of a narrow rectangular channel. © 2024 Editorial Board of Journal of Harbin Engineering. All rights reserved.
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页码：894 / 901
页数：7
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