Effect of non-condensable gas on laminar film condensation of steam in horizontal minichannels with different cross-sectional shapes

被引：15

作者：

Yin, Zhan ^{[1
]}

Wen, Jianjun ^{[1
]}

Wu, Yining ^{[1
]}

Wang, Qiuwang ^{[1
]}

Zeng, Min ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Minist Educ, Key Lab Thermofluid Sci & Engn, Xian 710049, Shaanxi, Peoples R China

来源：

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER | 2016年 / 70卷

基金：

中国国家自然科学基金;

关键词：

Condensation; Non-condensable gas; Minichannel; Cross-sectional shape; HEAT-TRANSFER; TUBE; MIXTURE; AIR;

D O I：

10.1016/j.icheatmasstransfer.2015.11.008

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In the present study, a 3-D numerical simulation of laminar film condensation of steam in the presence of non condensable gas is performed in horizontal minichannels with six cross-sectional shapes based on the volume of fluid (VOF) method. Mixture of steam and oxygen enters the channel with uniform temperature, while the inlet volume fraction of oxygen increases from 0% to 3%. It is shown that the existence of non-condensable gas results in significant reduction in the mass transfer rate from vapor to liquid along the interface in the axial direction. And then the heat transfer coefficient of condensation with oxygen is demonstrated to decline sharply compared with that of the pure vapor condensation. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：127 / 131

页数：5

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