There IS a filter, supposed to be cleaner than rain water and condensation happens...with or without wind. My quess is it works best in morehumid windy areas where air temp is much above the ground temp 6 feet below. There IS moisture in all air. Tho I don't know enough about it to know even if it
needs humidity but I assume it does. I ain't Berkley.
I kinda thought this would be controversial, tho it's not what I intended. What I intended was...check this out and if it happens, you heard it here first.
'Tis ok Jeff. You know we just like slappin' you around now and then!
I could see this having great potential near coastlines, where there is ample moisture in the air but no fresh ground water. But if the dewpoint gets below about 15%, it's gonna have a heck of a time trying to extract enough moisture to do any good. And THAT is the key here - is it enough of an advantage to do any good?!?!?
In more arid regions, this would probably only work at night when the temps are cooler. Why? Well, let's say you have a fixed amount of air that has a fixed amount of moisture, just for example. Let's say the daytime temps are 100°, and this certain volume of air can hold 100 molecules of moisture, which works out to be 50% humidity (again, just an example). If you lower the temp of this fixed amount of air down to 50°, you still have 100 molecules of moisture in that air. However, in the warmer air, this may translate to 100% relative humidity. This is because warm air can hold more moisture. Therefore, the cooler the temps get at night, the easier it will be to extract moisture from the air. Now here's the kicker: wind "normally" calms down at nighttime. So with this being wind-powered, does it charge a battery? Does it only work when the wind is blowing? Will this device provide enough water to justify the cost??
That's the BIG question there, as most of those desert families in Africa or wherever may only live off of about 25¢ a day! ...So who will be paying for these machines??
There was a guy a while back who came up with a great invention. This same guy invented the Segway machine. His water purifier device was called the Slingshot, and he engineered it to burn ANYTHING that could burn, as its fuel. This would include dried cow dung. Probably even dried human feces. If it would burn, it would work - or so the literature claimed. The device was about the size of a suitcase. It was powered by a Stirling-type engine, and turned heat from burning fuel into power to purify even the most putrid water! I forget now how much water it could provide per day, but it was enough that several families could survive using one device. Last I heard, he was still trying to get the cost down lower, as so few families or even tribes could afford the $300 cost. Haven't heard much on this thing in a long time, so guess it was another great design that failed to be low enough in cost. But the nice thing about this was, it would turn urine into 100% purified drinking water! Mud? No problem. Don't know if they ever tested it that far, but there was some sort of talk back then about supposedly being able to extract the water contained in most hazardous chemicals. Have a little extra paint laying around? Is it drying up and not being used? Instead of wasting the water, just run the material through the device. It extracts the water, then you can use the waste (once dried) as fuel for the next water source.
Again, don't know how well the actual device ever worked, but the mechanics of the water purification were SPLENDID, to say the least!
), water captures work dam near anywhere/anytime. Just saying it could work...hope it does...better in some places than others, but cool if it happens, and nothing more. 
