Influence of structural and operating condition parameters on performance of printed circuit heat exchanger

XU Tingting; ZHAO Hongxia; HAN Jitian; LAI Yanhua

doi:10.19666/j.rlfd.202006188

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Influence of structural and operating condition parameters on performance of printed circuit heat exchanger

Thermal Power Generation Vol. 49, Issue 12, Pages: 28-35(2020)

更新时间：2025-09-28

- Influence of structural and operating condition parameters on performance of printed circuit heat exchanger
- 作者机构：
  
  山东大学能源与动力工程学院
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202006188
  CLC： TK172
- Published Online：01 December 2020，
  
  Published：2020
- 稿件说明：
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XU Tingting, ZHAO Hongxia, HAN Jitian, et al. Influence of structural and operating condition parameters on performance of printed circuit heat exchanger[J]. Thermal Power Generation, 2020, 49(12): 28-35.
DOI：

XU Tingting, ZHAO Hongxia, HAN Jitian, et al. Influence of structural and operating condition parameters on performance of printed circuit heat exchanger[J]. Thermal Power Generation, 2020, 49(12): 28-35. DOI： 10.19666/j.rlfd.202006188.

摘要

印刷电路板式换热器(PCHE)具有耐高温高压和结构紧凑的特点

因此常被用于超临界二氧化碳(S-CO_2)布雷顿循环中。本文采用分段设计方法对PCHE建立了数学模型

与实验结果对比显示

热负荷、冷负荷、冷流体进口温度、热端换热面积、热端流量的误差分别为2.700%、0.330%、0.634%、0.683%、2.219%

证明了数值模型的正确性。对不同水力直径、壁厚及热端进口温度下的PCHE换热性能及阻力特性进行了对比分析

结果表明:水力直径与总传热系数和压降成反比

冷端压降大于热端;壁厚与总传热系数成反比

但压降对壁厚变化不敏感;热端进口温度越高

总传热系数和压降越小。研究结果可为PCHE的几何设计和热力学性能的研究提供一定参考。

Abstract

Printed circuit heat exchanger(PCHE) has the characteristics of high temperature and high pressure resistance as well as compact structure

so it is widely used in supercritical carbon dioxide(S-CO_2) Brayton cycle. In this paper

the mathematical model of the PCHE is established by segmental design method. Comparison with the experimental results shows that

the errors of heat load

cooling load

inlet temperature of cold fluid

hot side heat transfer area and hot side flow rate are 2.700%

0.330%

0.634%

0.683% and 2.219%

respectively

which proves the validity of the numerical model. The heat transfer performance and resistance characteristics at different hydraulic diameters

wall thicknesses and inlet temperatures of hot side are compared and analyzed. The results show that

the hydraulic diameter is inversely proportional to the total heat transfer coefficient and pressure drop

and the pressure drop at the cold side is larger than that at the hot side. The wall thickness is inversely proportional to the total heat transfer coefficient

but the pressure drop is not sensitive to the change of wall thickness. The higher the inlet temperature of the hot side

the smaller the total heat transfer coefficient and pressure drop. The research can provide some references for geometric design and thermodynamic properties of PCHE.

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