设计用于从潮湿空气中冷凝蒸汽或水的热交换器通常由金属制成。因此，会形成膜状冷凝，且增加的液态水膜厚度会阻碍传热。本文研究了柔性聚合物换热器的另一种设计方法，以及振动对从塑料薄膜上脱落液滴的影响。湿空气在聚四氟乙烯板（接触角=105°）上冷凝，并使用高速摄像机观察冷凝过程。用一个偏心质量电机振动薄膜，产生90赫兹的频率和正负1.1毫米（正负0.043英寸）的振幅。将振动膜置于大气压力下的环境室中，空气温度范围为30-35°C（86-95°F），相对湿度范围为50-66%。薄膜被主动冷却，水滴成核、聚结并从振动薄膜中脱落。 在每个试验条件下，进行基线静态试验以进行比较。在振动膜上观察到较小的临界液滴直径[例如，在固定膜上1毫米（0.04英寸）与5毫米（0.2英寸）]，并且液滴比在固定膜上脱落更快（例如，20分钟与110分钟）。引文:2018年冬季会议，伊利诺伊州芝加哥，会议论文

Heat exchangers designed to condense steam or water from moist air are frequently made from metal. As a result, filmwise condensation forms, and the increasing liquid water film thickness impedes heat transfer. This paper investigates an alternative approach for the design of a flexible, polymeric heat exchanger and the effects that vibrations have on shedding droplets from these plastic films. Moist air was condensed on a Teflon sheet (contact angle = 105°) and the condensation process was observed using a high-speed camera. The film was vibrated with an eccentric mass motor that produced frequencies of 90 Hz and amplitudes of plus or minus 1.1mm (plus or minus 0.043 in). The vibrating film was placed in an environmental chamber at atmospheric pressure with an air temperature range of 30-35°C (86-95°F) and relative humidity range of 50-66%. The film was actively cooled and water droplets nucleated, coalesced, and were shed from the vibrating film. At each test condition, a baseline stationary test was conducted for comparison. Smaller critical drop diameters were observed on the vibrating film [e.g., 1 mm (0.04 in) versus 5 mm (0.2 in) on the stationary film], and droplets shed more quickly than on the stationary film (e.g., 20 minutes versus 110 minutes).