Experimental investigation on flow boiling heat transfer characteristics in short flow passage counter-flow microchannels

被引：0
|
作者：
Li Y. [1 ,2 ]
Cao J. [2 ]
Hua X. [1 ]
Wu H. [1 ]
机构：
[1] School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai
[2] Beijing Electro-mechanical Engineering Institute, Beijing
来源：
Huagong Xuebao/CIESC Journal | 2023年 / 74卷 / 11期
关键词：
boiling instabilities; flow boiling; heat transfer enhancement; pressure drop; short flow passage counter-flow microchannels;
D O I：
10.11949/0438-1157.20230936
中图分类号：
学科分类号：
摘要：
In order to further improve the heat transfer characteristics of the flow boiling process and fundamentally solve the problem of premature drying out downstream, in this study, the short flow passage counter-flow microchannels (SFCM) is proposed and designed based on the concept of counter-flow microchannels by dividing the conventional parallel-flow microchannel (CPM) into two segments. The flow boiling heat transfer characteristics of deionized water are experimentally investigated at the mass flux of 118—219 kg/(m2·s) with inlet subcooling of 50℃, and the results are compared with the CPM. It is found that the critical heat flux (CHF) and average heat transfer coefficient (HTCave) can achieve a 160.6%—204.4% and 91.2%—115.4% enhancement, respectively. Meanwhile, compared with CPM, the pressure drop and pumping power of SFCM are reduced by 76.9%—80.4% and 44.9%—48.2%, respectively. More importantly, flow boiling instabilities can be effectively suppressed in SFCM. © 2023 Chemical Industry Press. All rights reserved.
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页码：4501 / 4514
页数：13
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