Based on the sorption and desorption cycle to realize fresh water production from the atmosphere

the sorption air-to-water device is designed and experimental research on this device is carried out.The device is mainly composed of solar collector

sorbent bed and condenser.In night the water in the air is sorbed by the sorbents and in the daytime the composite sorbents desorb the water vapor using solar energy.Four kinds of novel composite sorbents are prepared and several tests on this device are carried out

which are SC (type C silica-gel)-CaCl2

SC-LiCl

ACF (active carbon felt)-CaCl2 and ACF-LiCl.The experimental results show that:the performance of composite sorbents whose host material is ACF is better than sorbents whose host material is SC.The sorption and desorption performance of ACF-LiCl is the best

when the outlet temperature of sorbent bed is 90℃

the freshwater yield is 0.412 kg water·(kg sorbent)-1 after six hours desorption.