Some refrigerator designs work by burning gas. The core principle of a refrigerator is to use energy to move heat from one place to another. One classical sou

Some refrigerator designs work by burning gas. The core principle of a refrigerator is to use energy to move heat from one place to another. One classical source of energy in such thermodynamics context is to give oneself a hot spot and a cold spot. Heating gas can be used to make the hot spot. I remember using on vacations in the 80's a model that could work with 220V, 12V or gas. More on https://en.wikipedia.org/wiki/Refrigerator https://en.wikipedia.org/wiki/Refrigerator