Perhaps you’re wondering how your air conditioning unit cools your home. The secret is in one particular substance called refrigerant, which is the same product used in refrigerators and freezers to keep temperatures low. In ACs, refrigerant is used to convert humid air into the dry cool air that makes indoor temperatures more pleasant and comfortable.
Previously, refrigerants contain or were purely made from chlorofluorocarbon and hydrochloroflourocarbon, compounds that have a harmful effect on the environment, particularly the ozone layer. After their harmful effects were uncovered, these were replaced by the more energy-saving and environmentally-friendly compounds that are now being used in AC systems.
Refrigerant has a property that allows it to easily and quickly transform from gas to liquid and vice versa when exposed to cooling and heating elements. In an AC, it circulates across the system through two different sets of coil: the evaporator coil and the condenser coil.
As a liquid, refrigerant flows through the evaporator coil, where it transforms into gas as soon as it absorbs the heat from the indoor air blown into the system. It then moves in gaseous state toward the condenser coil where cool air from the outside condenses it and transforms it back into liquid state, starting the process all over again. The cycle happens very quickly to ensure that the room gets enough cool air.
SAUER HEATING AND COOLING 