"SteveB" wrote in message
news:5ftTe.74191$DW1.54455@fed1read06...

"Percival P. Cassidy" wrote in message
...
.

I'm assuming that they work on a similar principle to the kerosene
refrigerators I recall from a few decades back; a neighbor in a rural
area of UK with no electric supply had one. Some of those used ammonia as
the refrigerant, but maybe the propane ones now use Freon.

IIRC, the heat of the flame raises the pressure of the refrigerant just
as the compressor does in an electric refrigerator.

Perce

IIRC, the flame boils the ammonia, it condenses, and as it does, cools,
hence, cooling.

Oh for heaven's sake! When things condense they give off heat; so why would
it cool by condensing?
http://www.howstuffworks.com/refrigerator5.htm