How does an Air Conditioning (AC) System Work?
Think of an air conditioning system as a heat transporter continually moving heat from one area to another, to where it is not needed.
The actual cooling happens when warm air is moved across coils cooled by refrigerant. At this point, moisture is removed, the temperature is lowered and the cooled air is circulated into your house.
The scientific explanation of cooling is executed through a process known as phase conversion: when a liquid converts to a gas it absorbs heat.
A simple explanation of how an AC system uses phase conversion to cool air is this: A compressor pulls refrigerant, in gas form, from the evaporative coil inside your house to the condenser coil located in the external AC Unit. Here the big fan on your external AC unit pulls the heat out the refrigerant and returns it to liquid form. Now with the refrigerant back in liquid form, the process begins again.
It is through this endless cycle of refrigerant chilling the indoor air, and subsequent moving of heat outside that keeps your home cool in the hot DFW summers.