硝酸盐自然循环回路熔盐空气热交换器风冷通道内流场特性分析

侯祯; 蔡创雄; 张亚朋; 杨群; 何兆忠; 陈堃

doi:10.11889/j.0253-3219.2018.hjs.41.100603

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硝酸盐自然循环回路熔盐空气热交换器风冷通道内流场特性分析

核能科学与工程 | 更新时间：2021-05-19

- 硝酸盐自然循环回路熔盐空气热交换器风冷通道内流场特性分析
- Analysis of natural circulation flow field inside the air-cooled channel of molten salt-air heat exchanger in the nitrate natural circulation loop
- 核技术 2018年41卷第10期文章编号：100603
- 作者机构：
  
  1.中国科学院上海应用物理研究所嘉定园区上海 201800
  2.中国科学院大学北京 100049
- 作者简介：
  
  [ "侯祯, 男, 1992年出生, 2014年毕业于西安交通大学, 现为硕士研究生, 研究领域为核安全", "HOU Zhen, male, born in 1992, graduated from Xi'an Jiaotong University in 2014, master student, focusing on nuclear security" ]
  陈堃, E-mail:chenkun@sinap.ac.cn CHEN Kun, E-mail:chenkun@sinap.ac.cn
- 基金信息：
  
  中国科学院战略性先导科技专项项目(XDA02050100)
- DOI：10.11889/j.0253-3219.2018.hjs.41.100603
  中图分类号： TL364
- 收稿日期：2018-03-26，
  
  修回日期：2018-05-11，
  
  纸质出版日期：2018-10-10
- 稿件说明：
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侯祯, 蔡创雄, 张亚朋, 等. 硝酸盐自然循环回路熔盐空气热交换器风冷通道内流场特性分析[J]. 核技术, 2018,41(10):100603

Zhen HOU, Chuangxiong CAI, Yapeng ZHANG, et al. Analysis of natural circulation flow field inside the air-cooled channel of molten salt-air heat exchanger in the nitrate natural circulation loop[J]. Nuclear techniques, 2018, 41(10): 100603
侯祯, 蔡创雄, 张亚朋, 等. 硝酸盐自然循环回路熔盐空气热交换器风冷通道内流场特性分析[J]. 核技术, 2018,41(10):100603 DOI： 10.11889/j.0253-3219.2018.hjs.41.100603.

Zhen HOU, Chuangxiong CAI, Yapeng ZHANG, et al. Analysis of natural circulation flow field inside the air-cooled channel of molten salt-air heat exchanger in the nitrate natural circulation loop[J]. Nuclear techniques, 2018, 41(10): 100603 DOI： 10.11889/j.0253-3219.2018.hjs.41.100603.

摘要

硝酸盐自然循环回路（Nitrate Natural Circulation Loop，NNCL）是研究熔盐堆非能动余热排出技术的实验平台，通过熔盐非能动循环和风冷通道内的空气自然对流将热量排至大气。研究熔盐-空气热交换器风冷通道内的流场特性，可以深入了解NNCL自然循环的建立过程及有效性。采用数值模拟方法对NNCL熔盐-空气热交换器的风冷通道内的空气速度场和温度场分布进行研究，分析不同时刻风冷通道内的流场特性，获得了风门不同开启程度条件下，风冷通道内的温度场和速度场分布及变化规律。研究结果表明：NNCL的空气流道在风门开启后，可以很好地形成空气自然循环，并使换热器形成熔盐自然循环，带走热量。本研究弥补了NNCL流场分布实验条件的不足，为NNCL自然循环建立的有效性和稳定性提供了参考依据。

Abstract

Background

The application of passive safety systems can contribute to security and possibly reduce spending target of new nuclear power plant designs. Analysis methods and design must be employed to ensure that the systems perform their intended functions.

Purpose

This study aims to analyze the natural circulation of air inside the air cooling channel of molten salt-air heat exchanger in the nitrate natural circulation loop (NNCL).

Methods

Numerical simulation was employed to study the heat transfer performance by the FLUNT6.3 software. Both the air velocity field and distribution of temperature field were studied to analyze the characteristics of flow fields inside the air-cooled channel of molten salt-air heat exchanger.

Results

The distribution graph of velocity field and temperature field under various operating conditions was made into charts and graphics. The transient distribution variation rules of different sections are obtained. The results are approximately consistent with the record summarized by optical fiber measurement.

Conclusions

The results show that the molten salt-air heat exchanger of air cooling channel can form good natural circulation and take away the heat. It provides a theoretical basis for the operation and transformation of the air-cooled channel.

关键词

Keywords

references

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