Comments on: Separating Calcium Chloride From Water

By: Shahidian

Shahidian — Sun, 06 Nov 2011 04:11:22 +0000

Nice work. You said “water vapor will easily form on the surface because it doesn’t get hot under the sun). Glass, on the other hand, tends to get hot under the sun making it more difficult for water vapor to condense on its surface”. If you use a glass with tickness like polyethylene you can see more efficient than polyethylene.
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By: admin

admin — Sun, 27 Mar 2011 19:56:03 +0000

That’s true, in some cases it is too much effort. But there’s also situations where you don’t have easy access to electricity, like for some outdoor tents which might get too humid (such as when camping), so putting a tray of Calcium Chloride there is easier (and safer than ammonia-water refrigerators, icy-balls I think they’re called).

Also, some more humid and harder to reach areas of a house would lend themselves well to using Calcium Chloride, rather than putting an electric dehumidifier. For example if you want to keep the interior of windows free of moisture in the winter to avoid ice build up, you just put a small tray of CC at the base of the window and that will do the trick. It’s also much less noisy than running an electric dehumidifier, and more practical than using a Peltier device which is not something people can easily buy off the shelf, as far as I know.

By: Nathan Brazil

Nathan Brazil — Wed, 23 Mar 2011 20:42:06 +0000

This is a tremendous amount of trouble to go through to remove a few pints of water from the air. A Photovoltaic array driving a standard refrigerant-cycle dehumidifier, or even a simple Peltier-effect cooling device seems much more practical.

If you must use raw heat to do it, an ammonia-water refrigerator might work better. I have seen web articles on solar powered ice makers. Since all you need to do is get a surface below the dew point to extract water, not actually make ice, your dehumidification application might be easier.

Cheers

By: admin

admin — Sat, 26 Feb 2011 16:44:38 +0000

I didn’t notice any increase in temperature. So it’s probably negligible.

By: Lee

Lee — Sat, 26 Feb 2011 03:15:29 +0000

Hey, I saw your post about using the salt as a dehumidifier. I was wondering if you noticed any increase in the temperature when it was absorbing the water.

I live in humid florida and was wondering if the decreased humidity in the house from using the salt would be worth the increased heat from the exothermic reaction. Just curious of your thoughts.