  Drop-wise condensation (DWC) has been the focus of scientific research in
vapor condensation technologies since the 20th century. Improvement of
condensation rate in DWC is limited by the maximum droplet a condensation
surface could sustain. Furthermore, the presence of non-condensable gases (NCG)
reduces the condensation rate significantly. Here, we present continuous
drop-wise condensation (CDC) to overcome the need of hydrophobic surfaces while
yet maintaining micron-sized droplets. By shifting focus from surface treatment
to the force required to sweep off a droplet, we were able to utilize
stagnation pressure of jet impingement to tune the shed droplet size. The
results show that droplet size being shed can be tuned effectively by tuning
the jet parameters. our experimental observations showed that the effect of NCG
is greatly alleviated by utilizing our technique. An improvement by at least
six folds in mass transfer compactness factor compared to state-of-the-art
dehumidification technology was possible.
