The basic idea of the Munters Desiccant Rotor is very simple:
Air is blown though the rotor structure and the humidity in the air is absorbed by the desiccant. The air leaves the rotor as Dry Air.
A drive motor turns the rotor around slowly (6-10 times an hour).
The rotor structure passes a seperate sector where hot (reactiviation) air is blown through the rotor to remove the accumulated moisture. The resulting wet air (which contains the removed moisture) is blown away outside.
The rotor consists of a corrugated fiberglas structure, which contains a hygroscopic material (desiccants such as silicagel or lithium-chloride).
The system only has a few moving parts: one or two fans and a drive motor. No freon, no compressor.... just Simple Magic.......