Influence of metal foam on heat transfer characteristics of refrigerant-oil mixture flow boiling inside circular tubes

被引：40
|
作者：
Zhu, Yu [1 ]
Hu, Haitao [1 ]
Ding, Guoliang [1 ]
Sun, Shuo [1 ]
Jing, Yaolong [1 ,2 ]
机构：
[1] Shanghai Jiao Tong Univ, Inst Refrigerat & Cryogen, Shanghai 200240, Peoples R China
[2] Carrier Corp, Prod Mkt, Shanghai 200001, Peoples R China
来源：
APPLIED THERMAL ENGINEERING | 2013年 / 50卷 / 01期
关键词：
Flow boiling; Flow pattern; Heat transfer; Metal foam; Oil; HORIZONTAL TUBES; THERMAL-ANALYSIS; 2-PHASE FLOW; PART II; EXCHANGERS;
D O I：
10.1016/j.applthermaleng.2012.06.045
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The influence of metal foam on heat transfer characteristics of refrigerant and oil mixture flow boiling inside circular tubes was experimentally investigated on two horizontal circular tubes filled with 5 PPI and 10 PPI copper foams, respectively. The experimental conditions include saturation pressure of 995 kPa, mass flux from 10 to 30 kg m(-2) s(-1), heat flux from 3.1 to 9.3 kW m(-2), inlet vapor quality from 0.175 to 0.775 and oil concentration from 0% to 5%. The experimental results reveal that metal foam enhances the flow boiling heat transfer coefficient of refrigerant by a maximum of 185%, while the enhancement effect of metal foam is weakened at oil presence conditions. A new correlation is developed, which can agree with 98% of the experimental data within a deviation of +/- 30%. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1246 / 1256
页数：11
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