摘要
空分装置中主冷凝蒸发器的自由液面常发生波动，不利于空分装置的可靠运行．为了解这种变工况下换热器传热性能的变化情况，文中研究了不同间隙尺寸下，浸没深度对弦月形狭缝微膜蒸发通道内液氮的热虹吸沸腾换热特性的影响，并设计了一种补液措施．研究结果表明，通道内流体流量随浸没度变化而变化，并进而影响其换热性能．浸没度小于１．０时，通道传热性能明显下降，但采取补液措施后，明显提高了通道沸腾换热的临界热负荷，增强了通道对自由液面波动的适应性．
Fluctuation of the liquid surface in a condenser evaporator is undesirable to the operation of an air plant. Such an ill behavior can be determined from a knowledge of the effect of submergence on the boiling heat transfer in a lunate narrow channel with different gap size. Developed is a liquid supplying technology by assuming that the mass flow flux of the liquid varies from submergence. When submergence is less than unity, the heat transfer flux apparently decreases. With fresh liquid supply at the middle of flow channel, the critical heat flux is augmented greatly and the adaptability for different submergence is enhanced.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
1999年第4期38-43,共6页
Journal of Xi'an Jiaotong University
关键词
微膜蒸发
热虹吸沸腾
空气离装置
液氮
传热
narrow channel
micro film evaporation
thermosyphon boiling
submergence
