Reverse Osmosis Dehumidifyer

I have searched the web, and not found anything *quite* like what I'm thinking of. The idea is relatively simple.

Start with a reservior of low-water liquid desiccant (such as a calcium chloride / water mix).

Pass it, and room air, through the conditioning unit, where air and desiccant first mix, then seperate. Boring units would use a sprayer or bubbler, then a gas/liquid seperator. More interesting units would look like a decorative fountain (water feature type fountain, not drinking fountain).

Send the now wet desiccant through a small reverse osmosis device. Since it is small, we don't need a fancy pressure exchanger to recover pressure from the dewatered desiccant... instead, a simple positive displacement hydraulic motor would suffice. The unit's hydraulic motor and electric motor together provide the power to turn the positive displacement pump which forces wet dessicent into the reverse osmosis device.

The dewatered dessicant is then sent back to the conditioning unit.

The pure water extracted by the reverse osmosis device can be used for drinking, or can simply be discarded.

Besides (probably) using less energy than a refrigeration based dehumidifyer, and not warming up the air (as would occur in a liquid desiccant system which didn't use reverse osmosis), there's another big advantage.

If you have a large enough reserviour of desiccant, you can de-water it at night, using cheap(er) off-peak electricity, and then use that dry desiccant over the course of the day for dehumidification.