Vacuum Drying and Making Stuff Hot in a Vacuum

What happened

After previously exploring the impact of vapor pressure on the drying of desiccant and more, the conclusion was essentially that in order to drive moisture that’s not directly on a material’s surface out of it, you pretty much have to heat up said material to make the process not take forever. Fortunately, this is a solved problem, with commentators to the previous article helpfully pointing to the existence of devices like vacuum ovens.

Of course, you can either buy such a device and not worry your pretty little head about the finer details, or you can defy convention and build one yourself because you’re a rebel and really want to know how their internals work. Defining Hotness The four heat transfer modes.

The warm sunshine here is thus an example of heat transfer via radiation, while the contact between one’s bare feet and the cold tiles is an example of conduction. A Vacuum Isn’t Hot or Cold In a total vacuum, all you have is transient radiation.