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Drop-wise condensation (DWC) has been the focus of scientific research invapor condensation technologies since the 20th century. Improvement ofcondensation rate in DWC is limited by the maximum droplet a condensationsurface could sustain. Furthermore, the presence of non-condensable gases (NCG)reduces the condensation rate significantly. Here, we present continuousdrop-wise condensation (CDC) to overcome the need of hydrophobic surfaces whileyet maintaining micron-sized droplets. By shifting focus from surface treatmentto the force required to sweep off a droplet, we were able to utilizestagnation pressure of jet impingement to tune the shed droplet size. Theresults show that droplet size being shed can be tuned effectively by tuningthe jet parameters. our experimental observations showed that the effect of NCGis greatly alleviated by utilizing our technique. An improvement by at leastsix folds in mass transfer compactness factor compared to state-of-the-artdehumidification technology was possible.

A Novel Continuous Drop-Wise Condensation Technology for Improved Heat and Mass Transfer Efficiencies