Ammonia compressor compresses the ammonia
gas, which heats up as it is pressurized. The hot, compressed vapors
travel through coils much like the ones on the back of a refrigerator and dissipate the heat. As it cools in the coils, the gas condenses
into a liquid that is still at a high pressure. This liquid flows
through the expansion valve, which is similar to a small hole or port,
into a low-pressure area. The drop in pressure causes the gas to
immediately boil and vaporize, thereby dropping its temperature to -27°
Fahrenheit (-32.8° Celsius), which creates the refrigeration effects.
