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I'm not sure, but RV refrigerators work the same way, by heating Ammonia (via propane usually). because the heat source is typically propane, its great for locations without electricity.



Looks like you're talking about https://en.wikipedia.org/wiki/Icyball


it says its used in RV applications, but I don't see how the described system uses propane to heat a portion of the closed loop.




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