I have a air dehumidifier in my basement, and at work I am using a coalescing filter for our air compressor. As I see it, my air dehumidifier uses quite a lot of electricity compared to the completely passive coalescing filter.
Why cant we get a low power dehumidifier from a fan and a (presumably slightly larger than average) coalescing filter?
A coalescing filter separates liquids from gasses. You need a mist or droplets for it to work. There are dehumidifiers that work on compression, coalescing, expansion (some with energy recovery), but they aren't really suitable for the home. You need an aftercooler to condense the vapor for removal by the coalescing filter. Efficiency seems to be about 15% thermal.
