Refrigeration and Air Conditioning

In refrigeration, there is a transfer of thermal energy from a place at a cold temperature to a place at a higher temperature. In AC, thermal energy is taken away to keep the air at a cool temperature. The refrigeration parts include a compressor, condenser, and evaporator in one unit.

Air conditioning and refrigeration uses this point of refrigeration theory by causing refrigerant to cool and condense in the condensing unit. One way to think of it is that the heat that the refrigerant absorbed in the evaporator or "heat sponge" area is squeezed out of the refrigerant in the condenser.