[geeks] books on refridgeration and cooling

[James Sharp]

> I used to have a camper refridgerator that used a propane flame to compress
> and evaporate the freon (using a dual check valve), so you don't always need
> a compressor (not efficient for larger applications).

The Servell units.  It took me forever to wrap my brain around the fact
that it *burned* propane to *cool* the unit.  DOES NOT COMPUTE.