Good question, because it's not intuitive. But a gas-powered fridge operates like any other refrigeration or air conditioning system by using energy to move heat. A brief glance at "The Way Things Work" or another enlightening book will explain all.
Or, if a fun trip to the Library isn't on your agenda, go to this site:
"'Albert Einstein and Leo Szilard invented the thermodynamic cycle that is used in the gas-powered fridge and they patented it. Electrolux bought the patent rights in 1930 though the patent has since expired and the method is also used by Sibir. The fridge has no moving parts and is powered by a small flame or heat-source. It uses a working fluid which is a mixture of ammonia and water. The space in the pipes is filled with hydrogen and the whole thing is pressurised and sealed."
You really need a picture to explain it, and there's one at the above site.
Gas-powered refrigerators work without moving parts, without a compressor.
http://en.wikipedia.org/wiki/Refrigerator (general info)
· 1 decade ago