In a previous post, I have mentioned my interest in getting water from air. After some investigation, I have found two very interesting models we could build.
DIY Dehumidifier and Filter Combo
The first model consists in simply connecting a dehumidifier to a water filter. The dehumidifier will condense water from the air and the water is passed through a simple filter and the water is stored and ready to drink. This model may be very simple to build, but it may not be the cheapest as the costs of manufacture may be high. Also it seems to be hard to find a dehumidifier here in Kathmandu, some of my contacts admitted to having looked for one themselves for the past 2 years. This will require more searching.
The Air Drop irrigation system, designed by Edward Linacre is also very inspiring. It consists of a solar-powered fan, pumping air into an underground copper pipe filled with copper wool. As the hot outside air turbulently runs into the colder underground pipe, water from the air condenses and is collected in a tank below. Although the drip-irrigation purpose of this device is really interesting, this device could be adapted to produce drinkable water too. This device seems to be the most energy efficient, as it require energy for running the fan only. However, it depends on the premise there is some piece of land the system can be installed into. For this I’ll need to find out how to run a simple (computer) fan with a solar panel.