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Peltier Air Water Harvester Answered

I was looking around at some of the air water harvesters tonight and of thinking about using a Peltier unit for one. Just started thinking and I know very little about either one of these.
So my question is, could you use the cold side of a peltier to get an air current down to just below dew point causing humidity to condense on maybe a heat sink or something so it could be collected and use the hot side to create the air flow by a chimney effect? No moving parts.  Solar power it so it an be used anywhere in the world? Could be something that could supply clean water to people in need.

2 Replies

rickharris (author)2011-08-09

I guess it could work at a cost BUT it is far easier to use a polythene sheet, a stone, a cup and a hole dug in the sand.

Works fine.

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steveastrouk (author)2011-08-09

You COULD, you have to do some math to work out if its PRACTICAL though, or just something neat.

You need substantial heat sinking on a Peltier cell, if it isn't going to destroy itself, if you manage to get enought current to it.

The cells I use in my machines consume 450W each ! The smallest I've seen is maybe 1W.

Decide how much power you can throw at the problem.

Decide what climate you are expecting to get water from - Washington state/The UK - no problem - the Sahara, Arizona - forget it.



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