Atmospheric Water Generator

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.

Air Drop

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.

Air Drop

2 responses to “Atmospheric Water Generator

  1. Edit 06/03/13: I removed the Dew Drop example below from this post, as I realised it was a fictitious product without any consideration for technical feasibility. After further investigation, I have found out a Peltier cooler isn’t appropriate for large scale condensation, it would be completely energy inefficient.

    Dew Drop

    The Dew Drop gadget, which trickles condensed water to soil in order to drip-irrigate plants is an interesting example of atmospheric water generation. I gather from the look of it, that Dew Drop in fact is a simple Peltier heat pump, that is encased in a leaf shape. A Peltier heat pump is a simple device, which, when fed with electricity, will transfer heat from one of its side to the other. A by-product of this heat transfer is water condensation on the cold side. I imagine a simple device could be produced, consisting of a solar panel feeding the heat pump, and collecting condensed water in a tank.

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