I'm really hoping you mean "freeze-dry." There's enough problems with basic science around here.

I think they do this for things like orange juice ("Tang") and other drinks like that.

Still need to have the water, though. Water is shipped up to the Space Station at intervals, sometimes tapped off the Shuttle's fuel cells, and water vapor in the environment is recycled. They're working on more complete recycling methods.

The "dark side" of the ISS is indeed used to dump heat, but it's the "dark side" of the radiator assemblies that does this.

The Space Station has science refrigerators, but last I heard, not a food one.