A better dehumidifier can't really exist physically, current technology is pretty dang efficient. Water is just incredibly energy intensive to phase change, which will always make taking water from the air high energy. Not to mention dehumidifiers work best at high humidity, and the places that are in drought are not humid places.
Ventures like this have tried and failed many times, it is not a viable solution now or ever.
Fallacies_TE t1_iy0kctl wrote
Reply to comment by edgemint in Star Wars to science: Researchers harvest water from air to address shortages by Sorin61
A better dehumidifier can't really exist physically, current technology is pretty dang efficient. Water is just incredibly energy intensive to phase change, which will always make taking water from the air high energy. Not to mention dehumidifiers work best at high humidity, and the places that are in drought are not humid places.
Ventures like this have tried and failed many times, it is not a viable solution now or ever.