The cooling comfort your air conditioner produces is created by removing heat energy from indoor air, moving it outside and then dispersing it into outdoor air. These functions are handled by the evaporator and condenser coils.
In the closed-loop system of a typical air conditioner, refrigerant circulates continuously between the indoor evaporator coil and the outdoor condenser coil. In its frigid, vaporous state, refrigerant has high heat absorbing properties.
As it circulates through the evaporator coil installed in the indoor air handler, warm household air is drawn through the coil by the blower. Heat energy is transferred by the evaporator coil surfaces into the cold refrigerant, which is conveyed through an insulated line from the air handler to the outdoor condenser unit.
At the outdoor unit, a compressor pressurizes the refrigerant, concentrating molecules of heat energy. The hot refrigerant gas enters the condenser coil, where it expands and condenses to a liquid. As refrigerant condenses inside the condenser coil, heat energy is rapidly released. The coil fan blowing over the condenser surface disperses this heat into outdoor air.
Back to the Beginning
After leaving the condenser coil, the refrigerant circles back to the evaporator coil as a liquid under high pressure. Passing through an expansion valve, evaporation occurs and the refrigerant converts back to a frigid gas inside the evaporator coil. This process of transferring indoor heat outdoors continues as a continuous loop.
Made for Each Other
In today’s air conditioners, the evaporator and condenser coils are a matched set, engineered to accommodate your air conditioner’s specific BTU capacity.
Likewise, accurately determining the BTU requirements of your home is crucially dependent on the heat load calculation performed by an HVAC professional. When all the numbers are crunched and the components are matched, the result is maximum comfort and optimum efficiency.
Feel free to contact Andrews Auld Heating Cooling in Western North Carolina for more information about selecting and maintaining evaporator and condenser coils.
Our goal is to help educate our customers in Franklin, North Carolina and surrounding areas about energy and home comfort issues (specific to HVAC systems). For more information about evaporator and condenser coils and other HVAC topics, download our free Home Comfort Resource guide .
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