Thermal-hydraulic characteristics of a printed circuit board heat exchanger using supercritical carbon dioxide

Yang MING; Yang JIN; Wen YANG; Fulong ZHAO; Sichao TAN; Ruifeng TIAN

doi:10.11990/jheu.202207039

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Thermal-hydraulic characteristics of a printed circuit board heat exchanger using supercritical carbon dioxide

更新时间：2025-09-01

- Thermal-hydraulic characteristics of a printed circuit board heat exchanger using supercritical carbon dioxide
- Journal of Harbin Engineering University Vol. 45, Issue 4, Pages: 819-824(2024)
- 作者机构：
  
  1.哈尔滨工程大学核科学与技术学院, 黑龙江哈尔滨 150001
  2.中国舰船研究设计中心, 湖北武汉 430000
  3.中国核动力研究设计院, 四川成都 610041
- 作者简介：
- 基金信息：
- DOI：10.11990/jheu.202207039
  CLC： TL328
- Received：18 July 2022，
  
  Online First：09 February 2024，
  
  Published：05 April 2024
- 稿件说明：
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Yang MING, Yang JIN, Wen YANG, et al. Thermal-hydraulic characteristics of a printed circuit board heat exchanger using supercritical carbon dioxide[J]. Journal of Harbin Engineering University, 2024, 45(4): 819-824.
DOI：

Yang MING, Yang JIN, Wen YANG, et al. Thermal-hydraulic characteristics of a printed circuit board heat exchanger using supercritical carbon dioxide[J]. Journal of Harbin Engineering University, 2024, 45(4): 819-824. DOI： 10.11990/jheu.202207039.

摘要

对于超临界CO

布雷顿循环中的印刷电路板换热器

其复杂结构与工作介质的特殊物理性质将导致集总参数方法出现较大的计算误差。为提升印刷电路板换热器的换热参数的计算精度

本文基于Modelica语言

采取分节点建模方法

开发了印刷电路板换热器的热工水力特性计算程序

对其稳态运行时的换热参数进行了分析。结果表明: 印刷电路板换热器的通道内超临界CO

的对流换热系数沿流动方向发生显著变化。与设计值相比

分节点计算程序的最大相对误差小于3 %

计算精度相比于集总参数方法显著提升

因此有必要采取分节点计算方法以提高计算精度。研究结果可为超临界CO

布雷顿循环系统中印刷电路板换热器的设计和仿真提供参考。

Abstract

For the printed circuit heat exchanger (PCHE) in supercritical CO

Brayton cycle

its complex structure and special physical properties of the working medium will lead to large calculation errors in the lumped parameter method. To improve calculation accuracy

the PCHE thermal-hydraulic calculation program is developed on the basis of the Modelica language. The parameters of PCHE during steady-state operation are analyzed using the subnode method. The results show that the convective heat transfer coefficient of sCO

in the PCHE channel substantially changes along the flow direction. Compared with the design value

the maximum relative error of the subnode calculation program is less than 3 %. The calculation accuracy is also greatly improved compared with that of the lumped parameter method. Therefore

the subnode calculation method should be adopted to improve the calculation accuracy. The results can provide a reference for the design and simulation of PCHE in sCO

Brayton cycle systems.

关键词

Keywords

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