Condensation heat transfer characteristics of flue gas on anti-corrosive coated finned tubes

被引：7
作者：
Zhang, Wei [1 ]
Wang, Suilin [1 ]
Mu, Lianbo [1 ]
机构：
[1] Beijing Univ Civil Engn & Architecture, Sch Environm & Energy Engn, 1 Zhanlanguan Rd, Beijing 100044, Peoples R China
来源：
APPLIED THERMAL ENGINEERING | 2021年 / 189卷
基金：
北京市自然科学基金;
关键词：
Exhaust flue gas; Contact angle; Condensation heat transfer; Surface modification;
D O I：
10.1016/j.applthermaleng.2021.116672
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
It is still high on the agenda for the highly-effective utilization of exhaust flue gas in the condensing-type heat exchangers employing with anti-corrosive surface modification. In this paper, we carried out the wettability and condensation heat transfer characteristics of vapor-containing flue gas outside three kinds of anti-corrosive coated firmed tubes. The influence of Re (160 similar to 200) and Ja (0.8 similar to 2.9) of flue gas, and coating layers (Ni-P composite plating, organic coating, Ni-P composite plating + organic coating) on condensation heat transfer were also investigated. The results showed that the contact angle hysteresis is affected by the surface roughness and surface tension. The coating layers all exhibited four condensation periods of water vapor. The combining coating layer (Ni-P composite plating + organic coating) has the most excellent heat-transfer performance. Additionally, a dimensionless formula was established among Nu, Re and Ja for different coating layers. The dimensionless criterion can be helpful for the heat and mass transfer characteristics of vapor-containing flue gas and design the similar surface-modified condensation heat exchangers.
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页数：10
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