You have RE-invented the "any heat source" ammonia cycle refrigerator:
[link to www.aboutammoniarefrigeration.com]
>The Intermittent absorption system uses a generator charged with water and ammonia. A heat source, usually a kerosene flame, heats this solution in the generator. The ammonia is vaporized and driven off.
A condenser, at the top of the system, condenses the ammonia vapor into a liquid. The liquid flows by gravity into the liquid receiver shown above and then into the evaporator. During the generating cycle, little or no refrigerating effect is taking place. As the system cools, the pressure drops, causing the liquid ammonia in the evaporator to boil (flash off) and absorb heat. The cycle is completed when vaporized ammonia is re-absorbed in the Aqua ammonia solution in the generator.<
[link to www.nh3tech.org]
[link to home.howstuffworks.com]
>About RV Refrigerators
Your RV refrigerator doesn't use a compressor or any moving parts for that matter. It works off of the principle of absorption.
Instead of applying cold directly, the heat is drawn out, or absorbed. The theory is, when there is an absence of heat there is cold. Basically your RV refrigerator uses heat, either from an electric heating element or LP gas flame. The heat starts a chemical reaction and then through evaporation and condensation causes it to cool.<
[link to www.fabuloustravel.com]