水平矩形通道内含不凝气的蒸汽凝结换热

doi:10.11949/j.issn.0438-1157.20160882

化工学报 ›› 2016, Vol. 67 ›› Issue (S1): 246-252.DOI: 10.11949/j.issn.0438-1157.20160882

水平矩形通道内含不凝气的蒸汽凝结换热

程福宁, 戴仁坤, 温建军, 殷展, 曾敏, 王秋旺

西安交通大学热流科学与工程教育部重点实验室, 陕西西安 710049

收稿日期:2016-06-28 修回日期:2016-07-08 出版日期:2016-08-31 发布日期:2016-08-31
通讯作者: 曾敏,zengmin@mail.xjtu.edu.cn
基金资助:
国家自然科学基金项目（51276139）。

Condensation with non-condensable gas in horizontal rectangular channel

CHENG Funing, DAI Renkun, WEN Jianjun, YIN Zhan, ZENG Min, WANG Qiuwang

Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China

Received:2016-06-28 Revised:2016-07-08 Online:2016-08-31 Published:2016-08-31
Supported by:
supported by the National Natural Science Foundation of China (51276139).

摘要/Abstract

摘要：

对质量流量为38～132 kg·m^-2·s^-1的蒸汽/氮气混合气在水平矩形通道内的凝结换热过程进行了实验研究，研究了氮气含量、混合气质量流量以及冷水质量流量对蒸汽凝结换热的影响。结果表明：在蒸汽流速较高时，不凝气对蒸汽凝结换热的削弱相对较少——8%的不凝气使汽侧凝结传热系数平均下降了26.4%；蒸汽的凝结传热系数随着混合气质量流量的增加而增加、随着冷水流量的增加而下降；此外，通过研究还发现，沿着混合气流动方向，蒸汽凝结传热系数逐渐减小。

关键词: 矩形通道, 不凝气, 蒸汽凝结

Abstract:

The influence of N₂ mass fraction, coolant mass flux and mixture mass flux on condensation heat transfer in the horizontal rectangular channel have been investigated, with the mixture mass flux ranging from 38 kg·m^-2·s^-1to 132 kg·m^-2·s^-1. The results show that when the steam flows at high speed, the deterioration of noncondensable gas on the condensation heat transfer is relatively decreased, 8% noncondensable gas results in the reduction of 26.4% in condensation heat transfer coefficient. The condensation heat transfer coefficient increases with the increase of the mixture mass flux and decreases with the increase of the coolant mass flux. Moreover, the variations of the condensation heat transfer along the mixture flow direction are also obtained, the results show that the local condensation heat transfer coefficient decreases along the mixture flow direction.

Key words: rectangular, channel noncondensable, gas condensation

中图分类号:

TK124

程福宁, 戴仁坤, 温建军, 殷展, 曾敏, 王秋旺. 水平矩形通道内含不凝气的蒸汽凝结换热[J]. 化工学报, 2016, 67(S1): 246-252.

CHENG Funing, DAI Renkun, WEN Jianjun, YIN Zhan, ZENG Min, WANG Qiuwang. Condensation with non-condensable gas in horizontal rectangular channel[J]. CIESC Journal, 2016, 67(S1): 246-252.

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水平矩形通道内含不凝气的蒸汽凝结换热

Condensation with non-condensable gas in horizontal rectangular channel

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