- Materials science is fostering advances;
- Globally, there are relatively few commercial installations;
- The energy cost of water-from-air remains an obstacle;
- Desiccant technologies coupled with renewable energy sources are likely to be a versatile path forward;
- Relevant markets are remote arid regions with little or no conventional water supplies;
- Energy efficiency depends on a deep understanding of water properties; and
- Although water-from-air has "unique advantages" being "accessible anywhere" and readily used with renewable energy its "role in providing freshwater is still open for discussion".
Water-from-air technologies are attracting serious attention as shown by a recent editorial in the journal Nature Water. Highlights from the editorial include:
California's Water Supply Strategy (19-page document; click on the image above to read it) was published in August 2022. The strategy includes:
Intriguingly, the Strategy document says, "Rising temperatures evaporate more water, but more of that water stays in the air." (page 1 of 16). AWG's can recover that sequestered water.
The knowledge-base for using atmospheric water generators in California includes:
I have been researching and developing drinking-water-from-air technologies since 1984. As a physical geographer, I strive to contribute an accurate, scientific point-of-view to the field.