Introducing the Working Principle of the Ammonia Evaporator

Introducing the Working Principle of the Ammonia Evaporator

The working principle of an ammonia evaporator is based on the process of heat exchange and phase change of ammonia.

An ammonia evaporator usually consists of a series of pipes or coils that are filled with liquid ammonia inside.

When cooling is required, heat from the surrounding area is transferred to the ammonia evaporator. Liquid ammonia absorbs this heat and undergoes a phase change, transforming from a liquid to a gas.

During this process, the temperature of the ammonia remains essentially unchanged, but a large amount of latent heat is absorbed.

Specifically, heat is conducted from the external environment to the liquid ammonia through the walls of the evaporator tubes. Due to the low boiling point of ammonia, liquid ammonia vaporises rapidly after sufficient heat has been absorbed.

For example, in a cold store, the heat inside the store is transferred through the surface of the evaporator to the liquid ammonia inside, and the ammonia vaporises into ammonia gas, which carries away the heat from the store and achieves the effect of refrigeration.

With the generation of ammonia, ammonia will be sucked into the compressor, after compression to increase the pressure and temperature, into the condenser, in the condenser to release heat to become liquid ammonia again, and then recirculate back to the evaporator, to continue the refrigeration process.

In short, the ammonia evaporator absorbs heat through the vaporisation of liquid ammonia, realising the cooling effect of transferring heat from one place to another.