Design and Two-Phase Distribution Characteristic of Two-Stage Distribution Vertical Header for Microchannel Heat Exchangers

Wang Xiaoyu; Song Fenping; Xie Ligao; Dong Chao; Zhao Rijing; Huang Dong

doi:10.12465/j.issn.0253-4339.2024.06.114

您当前的位置：

首页 >

文章列表页 >

Design and Two-Phase Distribution Characteristic of Two-Stage Distribution Vertical Header for Microchannel Heat Exchangers

更新时间：2024-12-13

- Design and Two-Phase Distribution Characteristic of Two-Stage Distribution Vertical Header for Microchannel Heat Exchangers
- Journal of Refrigeration Vol. 45, Issue 6, Pages: 114-125(2024)
- 作者机构：
  
  1.西安交通大学制冷与低温工程系　西安　 710049
  2.广东美的制冷设备有限公司　佛山　 528311
- 作者简介：
  
  Huang Dong, male, professor, School of Energy and Power Engineering, Xi′an Jiaotong University, 86-29-82668738, E-mail: d_huang@mail.xjtu.edu.cn. Research fields: microchannel heat exchanger design.
- 基金信息：
  
  the National Natural Science Foundation of China(51876154)
- DOI：10.12465/j.issn.0253-4339.2024.06.114
  CLC： TB657.2;TB657.5
- Published：16 December 2024，
  
  Received：25 August 2023，
  
  Revised：27 October 2023，
  
  Accepted：2023-11-29
- 稿件说明：
移动端阅览
WANG XIAOYU, SONG FENPING, XIE LIGAO, et al. Design and Two-Phase Distribution Characteristic of Two-Stage Distribution Vertical Header for Microchannel Heat Exchangers. [J]. Journal of refrigeration, 2024, 45(6): 114-125.
DOI：

WANG XIAOYU, SONG FENPING, XIE LIGAO, et al. Design and Two-Phase Distribution Characteristic of Two-Stage Distribution Vertical Header for Microchannel Heat Exchangers. [J]. Journal of refrigeration, 2024, 45(6): 114-125. DOI： 10.12465/j.issn.0253-4339.2024.06.114.

摘要

制冷剂两相分配均匀性是影响换热器性能的重要因素。针对微通道换热器采用竖直集管分液效果较差的问题，提出两级均液集管的设计方案，通过两相制冷剂分配测试，对比了不同干度和总流量下，各支路的气液相流量比率。实验结果表明：空集管的顶部支路缺液，底部过液，各支路液相流量的相对标准差（RSD）大于95%；多股流集管通过底部进液腔分配，在多股流通道中向上流动并从侧面出流孔进入环形横隔腔，各支路液相RSD大于60%；在多股流集管中加入芯部整流腔和顶部分配腔后，液相RSD在5%以内，气相RSD在15%以内，分配效果良好。

Abstract

The two-phase distribution uniformity of a refrigerant is an important factor affecting the heat exchanger performance. To address the poor uniformity of the liquid phase in the vertical header of the microchannel heat exchanger

a design scheme of a two-stage distribution header is proposed. The gas and liquid flow ratios of each branch under different dryness and total mass flow rates are compared by two-phase refrigerant distribution testing. The top branch of the empty header does not have a sufficient amount of liquid

while the bottom has excess liquid. The relative standard deviation (RSD) of the liquid phase for each branch is larger than 95%. The multiflow header uses the bottom inlet cavity to distribute the liquid

and then the liquid flows upward in the multiflow channel and enters the annular cavity through the side outlet hole. The liquid RSD of each branch is larger than 60%. When the core flow-regulated cavity and top distribution cavity are added into the multiflow header

the distribution performance is satisfactory

with RSDs of liquid and gas phases below 5% and 15%

respectively.

关键词

微通道换热器竖直集管制冷剂分配两相

Keywords

microchannel heat exchangersvertical headerrefrigerant distributiontwo-phase

references

中国空调行业铝应用研究白皮书［J］. 家用电器, 2023(5): 24-35. (

White paper on aluminum application research in China′s Air conditioning industry［J］. Home Appliance, 2023(5): 24-35.)

熊通, 晏刚, 樊超超, 等. 微通道换热器两相流分布研究现状与展望［J］. 制冷学报, 2021, 42(1): 23-35. (

XIONG Tong, YAN Gang, FAN Chaochao, et al. Review on research status and prospects of two-phase flow distribution in microchannel heat exchanger［J］. Journal of Refrigeration, 2021, 42(1): 23-35.)

PARK N H, HA M Y. An experimental study on the effect of vertical header geometry on the two-phase refrigerant distribution and performance of a microchannel heat exchanger［J］. Applied Thermal Engineering, 2022, 209: 118287.

REDO M A, JEONG J, YAMAGUCHI S, et al. Characterization and improvement of flow distribution in a vertical dual-compartment header of a microchannel heat exchanger［J］. International Journal of Refrigeration, 2020, 116: 36-48.

WU Guoming, YAN Ziteng, ZHUANG Dawei, et al. Design method and application effects of embedded-clapboard distributor on refrigerant distribution among multi-tubes of micro-channel heat exchangers［J］. International Journal of Refrigeration, 2020, 119: 420-433.

PANDA K, HIROKAWA T, HUANG Long. Design study of microchannel heat exchanger headers using experimentally validated multiphase flow CFD simulation［J］. Applied Thermal Engineering, 2020, 178: 115585.

KIM N H, KIM C H, SHAH Y, et al. Improvement of two-phase refrigerant distribution for upward flow of a parallel flow minichannel heat exchanger using insertion devices［J］. Applied Thermal Engineering, 2019, 160: 114065.

MARCHITTO A, FOSSA M, GUGLIELMINI G. Distribution of air-water mixtures in parallel vertical channels as an effect of the header geometry［J］. Experimental Thermal and Fluid Science, 2009, 33(5): 895-902.

MARCHITTO A, FOSSA M, GUGLIELMINI G. The effect of the flow direction inside the header on two-phase flow distribution in parallel vertical channels［J］. Applied Thermal Engineering, 2012, 36: 245-251.

MARCHITTO A, FOSSA M. Enhancing the phase distribution in parallel vertical channels with single and double chamber coaxial headers［J］. Applied Thermal Engineering, 2019, 155: 239-246.

刘巍, 朱春玲. 分流板开孔面积对微通道平行流蒸发器性能的影响［J］. 制冷学报, 2014, 35(3): 58-64. (

LIU Wei, ZHU Chunling. Effects of open area of holes in deflector on performance of micro-channel evaporator with parallel flow［J］. Journal of Refrigeration, 2014, 35(3): 58-64.)

刘巍, 朱春玲. 分流板结构对微通道平行流蒸发器性能的影响［J］. 化工学报, 2012, 63(3): 761-766. (

LIU Wei, ZHU Chunling. Effects of deflector structure on performance of micro-channel evaporator with parallel flow［J］. CIESC Journal, 2012, 63(3): 761-766.)

KIM N H, LEE E J, BYUN H W. Improvement of two-phase refrigerant distribution in a parallel flow minichannel heat exchanger using insertion devices［J］. Applied Thermal Engineering, 2013, 59(1/2): 116-130.

WANG Chichuan, YANG K S, TSAI J S, et al. Characteristics of flow distribution in compact parallel flow heat exchangers, part II: modified inlet header［J］. Applied Thermal Engineering, 2011, 31(16): 3235-3242.

AHMAD M, BERTHOUD G, MERCIER P. General characteristics of two-phase flow distribution in a compact heat exchanger［J］. International Journal of Heat and Mass Transfer, 2009, 52(1/2): 442-450.

CIONCOLINI A, THOME J R. Void fraction prediction in annular two-phase flow［J］. International Journal of Multiphase Flow, 2012, 43: 72-84.

FOSSA M, PISONI C, TAGLIAFICO L. Experimental direct contact heat tranfser in upward air-water developing annular flow［J］. International Communications in Heat and Mass Transfer, 1995, 22(6): 825-835.

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Experimental Study on Air-source Heat Pump Water Heater with Vapor-liquid Adjustment Evaporator

Experimental Investigation on Liquid Separation Equipment of Outdoor Heat Exchanger

Quasi-dynamic Hermetical Compressor Model Suitable for Dynamic Simulation of Refrigeration System

Related Author

Yang Zhi

He Jiacheng

Liang Yingzong

Luo Xianglong

Chen Ying

Chen Jianyong

Wen Xuecheng

Li Wanyong

Related Institution

School of Material and Energy, Guangdong University of Technology

Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter

Institute of Refrigeration and Cryogenics，Shanghai Jiao 'Tong University

Jiangsu Z-Park Energy Saving and Environmental Protection Research Co.,Ltd.

广东美的制冷设备有限公司

Address：10/F, Yindu Mansion, 67 Fucheng Road, Haidian Dist, Beijing, China Postal code：100142
Tel：010-68711412 Email：editor@car.org.cn
Technical support is provided by Beijing Founder electronics co., LTD 京ICP备09064830号-19 京公网安备11010802024621
It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.

⁰