Where are water-from-air machines an appropriate and effective niche technology for augmenting drinking water supplies? I've produced this water vapour density map to provide a quick guide. Locations within the latitude band 30° N to 30° S are usually good unless they are at high altitudes (more than a few hundred metres above sea level). Outside of this band, machines are likely to perform satisfactorily during the summer (high sun) season. Locations with less than 7.2 grams of water vapour per cubic metre of moist air (see legend below the map) are unlikely to be good locations for water-from-air production—the energy cost of producing a litre of liquid water is going to be unacceptable to most users.
Please click on the map to see a larger image.
Mean water vapour density at sea level averaged over the ten year period 2001 to 2010. The base image was provided by Physical Sciences Division, Earth System Research Laboratory, NOAA, Boulder, Colorado, from their web site at http://esri.noaa.gov/psd/.
How much interest is there in water-from-air technology? Wikipedia provides page view statistics for its articles. These statistics provided a crude estimate of interest from the English-reading, Internet-using public. Here is the table I assembled, with twenty-eight Wikipedia articles listed in order of page views in the last 30 days as of April 10, 2012. I started with the reference list in the Atmospheric water generator article. As I went from one referenced article to the other a point was reached when no new relevant references were found.
The hierarchy of public interest in these related topics was made evident. The water cycle must be a popular topic in schools!
The article Atmospheric water generator, with 4178 page views was of most interest because that terminology has become widely used to describe commercial machines that produce drinking water from the ambient air. The article, Desalination, had a much higher profile, attracting 10 times as many page views. For those of us seeking to raise the profile of water-from-air technology---we have a lot of work to do given only 100 to 150 people viewed the AWG article each day. How many read it is another matter!
(By the way, I have not been a contributor to Wikipedia articles.)
Table: Water-from-air relevant topics in Wikipedia
Welcome and thank you to all my site visitors! I hope you are finding information about water-from-air technology that is useful to you. If you have any suggestions for site features, please let me know. I recently completed renovating my related site, www.waterplusfood.com, which occupied quite a bit of my time. With that done, I intend now to make the Atmoswater Research site even better.
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.