Effects of pin and wire electrodes on flow boiling heat transfer enhancement in a vertical minichannel heat sink

被引：23
作者：
Zhang, Jinxin [1 ]
Luo, Xiaoping [1 ]
Feng, Zhenfei [2 ]
Guo, Feng [1 ]
机构：
[1] South China Univ Technol, Sch Mech & Automot Engn, Guangzhou 510641, Guangdong, Peoples R China
[2] Guangxi Univ, Coll Mech Engn, Nanning 530004, Guangxi, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2019年 / 136卷
基金：
中国国家自然科学基金;
关键词：
Minichannel; Flow boiling; Pin electrode; Wire electrode; Heat transfer augmentation; PRESSURE-DROP; SINGLE-PHASE; MICROCHANNELS; PERFORMANCE; FIELD; EHD; CONDENSATION; EVAPORATOR; CHANNELS; BEHAVIOR;
D O I：
10.1016/j.ijheatmasstransfer.2019.03.043
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
In this paper, electrohydrodynamic (EHD) enhancement of flow boiling heat transfer in a vertical minichannel heat sink was investigated experimentally. The pin and wire electrodes are used to create different kinds of non-uniform electric fields. Flow boiling experiments of refrigerant R-141b under electric fields are conducted under various applied voltages. The results show that the application of pin and wire electrodes can promote the Onset of Nucleate Boiling (ONB) and effectively enhance heat transfer coefficient. For the pin and wire electrodes, the EHD enhancement effect increases with the increase of applied voltage. At the same heat flux, heat transfer enhancement for pin electrode is higher than that for wire electrode at low applied voltage (U <= 400 V), but is lower than that for wire electrode at high applied voltage (U >= 550 V). Moreover, the obtained maximum enhancement ratio for pin and wire electrodes could reach 1.72 and 1.80, respectively. The influence area of pin electrode is limited, whereas the influence area of wire electrode is the entire electrode length at U >= 400 V. Based on the simulation and experiment results, the enhancing mechanism of EHD on flow boiling heat transfer in minichannel was discussed. (C) 2019 Elsevier Ltd. All rights reserved.
引用
收藏
页码：740 / 754
页数：15
相关论文
共 46 条
[1]   A comparative study of flow boiling HFE-7100 in silicon nanowire and plainwall microchannels [J].
Alam, Tamanna ;
Li, Wenming ;
Chang, Wei ;
Yang, Fanghao ;
Khan, Jamil ;
Li, Chen .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2018, 124 :829-840
[2]  
[Anonymous], 2016, NANOSCALE MICROSCALE
[3]   EHD behavior of nitrogen bubbles in DC electric fields [J].
Chen, F. ;
Peng, Y. ;
Song, Y. Z. ;
Chen, M. .
EXPERIMENTAL THERMAL AND FLUID SCIENCE, 2007, 32 (01) :174-181
[4]   A two-phase flow pattern map for annular channels under a DC applied voltage and the application to electrohydrodynamic convective boiling analysis [J].
Cotton, J ;
Robinson, AJ ;
Shoukri, M ;
Chang, JS .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2005, 48 (25-26) :5563-5579
[5]   AC voltage induced electrohydrodynamic two-phase convective boiling heat transfer in horizontal annular channels [J].
Cotton, J. S. ;
Robinson, A. J. ;
Shoukri, M. ;
Chang, J. S. .
EXPERIMENTAL THERMAL AND FLUID SCIENCE, 2012, 41 :31-42
[6]  
Dai Yong, 2011, Journal of Central South University (Science and Technology), V42, P1316
[7]   On the flow boiling enhancement in interconnected reentrant microchannels [J].
Deng, Daxiang ;
Xie, Yanlin ;
Huang, Qingsong ;
Wan, Wei .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2017, 108 :453-467
[8]   Adiabatic bubble growth in uniform DC electric fields [J].
Di Bari, Sergio ;
Robinson, Anthony J. .
EXPERIMENTAL THERMAL AND FLUID SCIENCE, 2013, 44 :114-123
[9]   Bubble shape under the action of electric forces [J].
Di Marco, Paolo ;
Kurimoto, Ryo ;
Saccone, Giacomo ;
Hayashi, Kosuke ;
Tomiyama, Akio .
EXPERIMENTAL THERMAL AND FLUID SCIENCE, 2013, 49 :160-168
[10]   Effect of electric field on the enhanced heat transfer characteristic of an evaporator with multilayered sintered copper mesh [J].
Diao, Y. H. ;
Liu, Y. ;
Zhang, J. ;
Guo, L. ;
Zhao, Y. H. ;
Wang, S. .
JOURNAL OF ELECTROSTATICS, 2015, 73 :26-32
12345