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conversion of wet air into dry air? Answered

there is a really very intresting topic about the conversion of wet air into dry air and vice versa with very less circuit design. the moto behind doing so is that i want to convert the wet air of any closed room into dry air and feed that dry air into my project on which i'm working.



Dehumidifying... hmmm. How about a car radiator? Hack it by mounting it on a frame so it's horizonal and use a fan to blow air down through it. Don't forget a bucket to catch the drips.
Rehumidifying is easier. Pour water into a wide and shallow container like a cookie sheet or a kiddie pool. Why? The more of the water exposed to the air, the faster it evaporates. You can increase the rate by heating it.

De-Humidifiers generally are either chemically based absorbing the moisture or use some form or refrigeration to cool the wet air to condense the moisture out.

I guess at a DIY level you could try running the air over ice packs or bottles of frozen water to see how much water was removed. Surface area is the key.

+2. Refrigeration based dehumidification is the most common. Chemical dissicant can only go so far :)

Chemical dessicants can go all the way to Zero moisture, but only once, without regeneration.


That's what I meant by only so far -- if you have to dry a project that is giving off moisture, you'll end up saturating it eventually.

Your freezer will only ice-up so far though.


aha, but the cooling coil of a refrigeration system doesn't need to freeze solid - it can just precipitate the condensate somewhere else for easy disposal.

Unless you defrost, you end up with a big lump of drippy-ice.  like CaCl2 its ultimately "drippy".


How dry do you need the air to be?

Dry calcium chloride will have a desiccating effect.