Far out! I especially liked this part:

The evaporator is supplied with hydrogen. The hydrogen passes across the surface of the ammonia. It lowers the ammonia vapor pressure enough to allow the liquid ammonia to evaporate. The evaporation of the ammonia extracts heat from the evaporator. This, in turn, extracts heat from the food storage space, lowering the temperature inside the refrigerator.


The operating principles are so elegant and simple (in execution, certainly not in concept!) that I wonder why all refrigerators aren't made that way.

If you used an electric heating element (instead of burning kerosene or propane) I wonder which type of refrigerator would be more economical to operate? Which would be more economical to build?

tanstaafl.