[original post is likely clipped to save bandwidth]
On Wed, 7 Sep 2005 08:09:48 -0700, "Ulysses"
wrote:


My understanding of propane (absorption) refrigerators is that they contain
a mixture of ammonia and water. The mixture is heated and the ammonia
vaporizes. As the vaporization occurs the result is expanding gas.
Expanding gases absorb heat, hence the name. This is easily demonstrated by
using any spray can or letting the air out of a tire or tank of compressed
gas/air. You can feel the can/tank get colder. If you let the air out of a
SCUBA tank ice will form on the valve.

A level of abstraction may help. All heat pumping devices use some form of
potential energy to transport thermal energy from or to a desired place.

Folks accept that building a fire can be used to refrigerate! Light a fire
at a coal power plant, make steam, then electricity, send it to a home and
use it to operate a refrigerator. The source of the needed energy is a
fire at a coal burning power plant!

Take out a few steps and you have fire to cold in one box!

A compressor is a pump. Gas refrigerators have a pump! The percolator is a
pump, it creates enough pressure differences and mechanical "refrigerant"
transport to use heat of vaporization just as an electric driven
refrigerator does.

The combination of water, ammonia highly pressurized with hydrogen set the
stage to do it all in one box.

gerry

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