The technique described sounds similar to how desiccant dehumidifiers work, where you capture moisture in a desiccant then remove the moisture by heating the desiccant. The energy required is similar to the chiller based technology due to the laws of thermodynamics.
I have a one that has a descant drum, and it slowly rotates as it blows air through it. A small section of the drum is heated to release water into a separate air stream and that air is then ran through a radiator to cool it, releasing water into a storage container. It costs $0.5-1/L to generate water with it, since the heat comes from electricity. Heat could easily come from solar, leaving ~20w for a fan.
I have a one that has a descant drum, and it slowly rotates as it blows air through it. A small section of the drum is heated to release water into a separate air stream and that air is then ran through a radiator to cool it, releasing water into a storage container. It costs $0.5-1/L to generate water with it, since the heat comes from electricity. Heat could easily come from solar, leaving ~20w for a fan.