What happens to the refrigerant in the evaporator?

In the evaporator, the refrigerant undergoes a phase change where it absorbs heat from the surrounding environment, typically the indoor air in a cooling system. As the refrigerant absorbs this heat, it warms up and transitions from a liquid state to a vapor state. This is a key process in the refrigeration cycle, as it allows the system to remove heat from the area being cooled.

By absorbing heat, the refrigerant effectively cools the air that passes over the evaporator coil, creating a comfortable indoor environment. The ability of the refrigerant to change states while absorbing heat makes it an integral part of the heat exchange process in refrigeration and air conditioning systems.