Ammonia-based Refrigeration System Evaporator

The ammonia evaporator is a fundamental component in an ammonia-based refrigeration system, particularly in the cold section where it serves as a heat exchanger. In these systems, ammonia acts as the refrigerant, circulating through various components to absorb heat and provide cooling.

Function:

Evaporation of Ammonia:

The primary function of the ammonia evaporator is to facilitate the evaporation of ammonia from a liquid to a gas.

In the evaporator, the high-pressure, liquid ammonia enters and undergoes a phase change, absorbing heat from the surroundings (air or a process fluid) in the process.

As the liquid ammonia absorbs heat, it evaporates, turning into a low-pressure, cold ammonia vapor.

Heat Transfer:

The ammonia evaporator acts as a heat exchanger, allowing heat from the surroundings to transfer to the evaporating ammonia.

This heat transfer causes the surroundings to cool down, making the evaporator an essential component in the refrigeration cycle.