板翅式换热器新型翅片换热特性数值模拟研究

缪洪康; 陈玉爽; 吕刘帅; 王纳秀

doi:10.11889/j.0253-3219.2018.hjs.41.100601

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板翅式换热器新型翅片换热特性数值模拟研究

核能科学与工程 | 更新时间：2021-05-19

- 板翅式换热器新型翅片换热特性数值模拟研究
  封面论文
- Numerical simulation study on heat transfer characteristics of new heat exchange fins
- 核技术 2018年41卷第10期文章编号：100601
- 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.上海卫星工程研究所上海 201109
  3.中国科学院大学北京 100049
- 作者简介：
  
  [ "缪洪康, 男, 1993年出生, 2015年毕业于哈尔滨工程大学, 现为硕士研究生, 研究方向为反应堆热工水力", "MIAO Hongkang, male, born in 1993, graduated from Harbin Engineering University in 2015, master student, focusing on nuclear reactor thermal-hydraulic" ]
  王纳秀, E-mail:wangnaxiu@sinap.ac.cn WANG Naxiu, E-mail:wangnaxiu@sinap.ac.cn
- 基金信息：
  
  国家自然科学基金(91326201);中国科学院战略性先导科技专项项目(XDA0201002)
- DOI：10.11889/j.0253-3219.2018.hjs.41.100601
  中图分类号： TK172
- 收稿日期：2018-06-04，
  
  修回日期：2018-07-30，
  
  纸质出版日期：2018-10-10
- 稿件说明：
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缪洪康, 陈玉爽, 吕刘帅, 等. 板翅式换热器新型翅片换热特性数值模拟研究[J]. 核技术, 2018,41(10):100601

Hongkang MIAO, Yushuang CHEN, Liushuai LYU, et al. Numerical simulation study on heat transfer characteristics of new heat exchange fins[J]. Nuclear techniques, 2018, 41(10): 100601
缪洪康, 陈玉爽, 吕刘帅, 等. 板翅式换热器新型翅片换热特性数值模拟研究[J]. 核技术, 2018,41(10):100601 DOI： 10.11889/j.0253-3219.2018.hjs.41.100601.

Hongkang MIAO, Yushuang CHEN, Liushuai LYU, et al. Numerical simulation study on heat transfer characteristics of new heat exchange fins[J]. Nuclear techniques, 2018, 41(10): 100601 DOI： 10.11889/j.0253-3219.2018.hjs.41.100601.

摘要

为提高双熔盐板翅式换热器的紧凑度和热工水力性能，对新型翅片（流线型及改进流线型）的热工特性开展数值模拟研究。在熔盐工质下与传统矩形翅片相比，流线型翅片换热系数提高了3.6%~6.7%，综合性能指标平均提高2%，且高流速工况下换热能力有较大提升；改进流线型翅片的压损，较矩形翅片减少了6.2%，比流线型翅片减少了12%；在水工质下，各型式翅片综合性能指标与熔盐工质时相比均有较大幅度的提升，但新型翅片相比传统矩形翅片不再具有优势，流线型翅片型式具有在熔盐介质的独特适用性。

Abstract

Background

The molten-salt heat exchanger is an important part of thorium molten salt reactor with liquid fuel (TMSR-LF1) integrated simulation platform

and its thermohydraulic performace is critical to the safety in operation. Furthermore

there are many problems in traditional shell and tube heat exchangers. It is very important to develop new heat exchanger.

Purpose

This study aims to redesign heat exchange fins to improve the compactness and thermohydraulic performance of molten salt heat exchanger by numerical simulation.

Methods

Simulation software FLUENT was employed to design and improve different fin types

and the numerical results of each type were compared and analyzed from three aspects:pressure drop

heat transfer coefficient and comprehensive performance index. The numerical simulation under the condition of water is carried out

and the results are compared with those of molten salt.

Results

Compared with the traditional rectangular fins

the heat transfer coefficient of streamline fin in molten salt is increased from 3.6% to 6.7%

the comprehensive performance index is increased by 2% on average

the overall compactness is enhanced

and the heat transfer capacity is greatly improved at high velocity. The improved streamline fin has a minimum pressure drop of 6.2% and 12% lower than that of the rectangular fin and the streamline fin

respectively. The comprehensive performance index of each fin was greatly improved under the water condition

but the streamline fin was no longer superior to the traditional rectangular fin in the water phase.

Conclusion

It reflects the unique applicability of streamline fin type in molten salt medium.

关键词

Keywords

references

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