In order to improve the single-stage water separation ratio, a novel
design is proposed in this paper, in which the HPs transfer the heat to
droplets for a second evaporation after the initial spray flash evaporation,
and the adsorbent beds absorbs steam generated in the evaporator
quickly to maintain the vacuum level. Compared to traditional single stage
flash evaporator, the new design decreases the evaporation pressure,
in turn, increases the water separation ratio from 5% to 46%,which
allows a more compact device driven by ultra-low grade heat source
from minimum temperature of 50 °C. Main conclusions of the present
work are drawn as follows