This Crazy Idea is to remove humidity from the air inside of a clothes dryer without either adding heat or using expensive or eco-unfriendly artificial refrigerants.

How it would work:
* humid air is sucked out of the clothes drum, and pulled through a dust filter. * this humid air goes through the air compressor, which which compresses it adibadically, increasing the temperature. * this warm, humid, compressed air passes through a counter-current heat exchanger, which cools it, causing some of the humidity to condense into liquid water. * the cooled mix of water and liquid air is passed through an air/liquid separator. * the (cool) air, still at high pressure, passes through a turbo expander, cooling it further, and as a bonus, recovering mechanical energy. * now at atmospheric pressure, the air passes through a second air/liquid separator. * having been dewatered a second time, the cool air passes through the heat exchanger (again), warming it back up. * the dry, tepid air returns to the clothes drum. * the liquid from the two air/liquid separators passes through an oil/water separator, so that lubricant from the compressor and expander can be recovered.

ThisCrazy Idea is basically taking the process commonly used to liquify air, using a lower power, lower pressure version of it to liquify humidity.

It might be better to an use alternative pneumatic motor if the turbo expander is likely to be damaged by water.

This could be considered a heat pump based device, but one which uses cheap, safe refrigerants R718 (water) and R729 (air).