CONVECTIVE CONDENSATION OF R410A IN MICRO-FIN TUBES

被引：5

作者：

Zhang, Guan-min ^{[2
]}

Wu, Zan ^{[1
]}

Wang, Xu ^{[1
]}

Li, Wei ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Energy Engn, Hangzhou 310027, Peoples R China

[2] Shandong Univ, Sch Energy & Power Engn, Jinan 250061, Peoples R China

来源：

JOURNAL OF ENHANCED HEAT TRANSFER | 2012年 / 19卷 / 06期

基金：

中国国家自然科学基金;

关键词：

micro-fin tube; condensation; pressure drop; heat transfer; mass flux; EVAPORATIVE HEAT-TRANSFER; PRESSURE-DROP; GENERAL CORRELATION; FLOW; REFRIGERANTS; SMOOTH;

D O I：

10.1615/JEnhHeatTransf.2012006001

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

An experimental investigation was performed for convective condensation of R410A inside five micro-fin tubes with the same outer diameter of 5 mm and helix angle of 18 degrees. Data are for mass fluxes ranging from about 180 to 650 kg/m(2) s. The nominal saturation temperature is 320 K, with inlet and outlet qualities of 0.8 and 0.1, respectively. The results suggest that tube 4 has the best thermal performance for its largest condensation heat-transfer coefficient and relatively low pressure-drop penalty. The heat-transfer enhancement mechanism is mainly due to the surface area increase over the plain tube at large mass fluxes, while liquid drainage and interfacial turbulence play important roles in heat-transfer enhancement at low mass fluxes. In addition, the experimental data were analyzed using seven existing pressure-drop and four heat-transfer models to verify their respective accuracies.

引用

页码：515 / 525

页数：11

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