摘要
在低温高湿环境下金属表面常出现的冷凝现象会引发腐蚀或热效率降低的问题,这对设备运行存在稳定性和安全性隐患。为了准确判断金属固体表面出现冷凝临界点,本文采用多物理场耦合COMSOL软件分析了不同的固体形状、空气温度及湿度条件下固体表面的冷凝情况,得出以下结论:不同形状尺寸的固体表面在出现冷凝的临界点相差很小;空气相对湿度数值越大,冷凝临界点越高,反之越低;空气的温度越高,冷凝临界点越高,反之越低。总之,进口空气的温度和湿度是影响固体表面冷凝的主要因素。
Condensation that often occurs on metal surfaces in a low-temperature and high-humidity environment can cause corrosion or reduced thermal efficiency, which poses hidden dangers to the stability and safety of equipment operation. In order to accurately determine the critical point of condensation on the metal solid surface, this paper uses the multi-physics coupling COMSOL software to analyze the condensation on the solid surface under different solid shapes, air temperature and humidity conditions. The following conclusions are drawn: the solid surfaces of different shapes and sizes have very little difference at the critical point of condensation. The larger the relative humidity of the air, the higher the condensation critical point, and vice versa. The higher the air temperature, the higher the condensation critical point, and vice versa. In short, the temperature and humidity of the inlet air are the main factors that affect the solid surface condensation.
作者
陈达南
邓立生
陈捷超
车哲述
周友
CHEN Danan;DENG Lisheng;CHEN Jiechao;CHE Zheshu;ZHOU You(Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou 510640,China;Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou),Guangzhou 511458,China;不详;National Institute of Clean-and-Low-Carbon Energy,Beijing 102211,China)
出处
《制冷》
2021年第4期63-67,共5页
Refrigeration
基金
国家能源集团科技创新项目(GJNY-20-121)
南方海洋科学与工程广东省实验室(广州)人才团队引进重大专项(GML2019ZD0108)
广东省自然科学基金项目(2017A030310185)。
关键词
冷凝
热湿空气
数值模拟
扩散
对流换热
Condensation
Hot Humid Air
Numerical Simulation
Diffusion
Convective Heat Transfer
