滴状冷凝的实现方法研究进展

Progress in implementation of dropwise condensation

为了更好地基于不同用途选择合适的滴状冷凝表面,针对滴状冷凝的实现方法、其滴状冷凝换热性能和寿命进行综述.结果表明:增强滴状冷凝表面的疏水性能不会同时显著提高滴状冷凝换热性能;滴状冷凝的表面寿命限制了其工业应用;滴状冷凝工质目前主要针对水蒸汽,缺乏对工业中普遍存在的低表面张力工质的关注;现有方法得到的滴状冷凝表面对温度敏感,温度过高或过低均会影响其性能;未来发展宽温区、适用于低表面张力、长寿命的滴状冷凝表面是非常必要的.

The implementation methods of dropwise condensation,their heat exchange performance and lifetime were reviewed to better choose the most appropriate dropwise condensation surface in different applications.The results in literature show that improving the hydrophobicity of the condensation surface can not simultaneously provide prominent enhancement in heat transfer performance.The surface lifetime limits the application of dropwise condensation in industry.The current studies of dropwise condensate mainly focus on water vapor,but lack attention of low surface tension working fluids,which are commonly used in industries.The dropwise condensation surfaces obtained by the current methods are sensitive to temperature and the performance of the surface is influenced by fluctuations of temperature.It is very essential to develop a durable dropwise condensation surface that can accommodate wide temperature range and low surface tension fluids in the future.