How it Works
Those not familiar with residential geothermal heating/cooling systems often ask the question, "How does it work?". The answer: It is simply a refrigeration unit, or "a device facilitating the transfer of heat (energy) from one location to another." Just as heat is transfered away from warm foods placed in a refrigerator, even so heat is transfered from the earth into a home during the winter (heating mode), and excess heat is transfered from a home into the earth during the summer (cooling mode).
Some helpful facts relating to heat transfer:
*High concentrations of heat will by nature transfer to materials of lower concentrations of heat.
*Cold cannot be forced into a substance in order to cool or freeze it. Cooling or freezing a substance is simply a result of removing a portion of it's heat.
*When a liquid receives excess energy, it vaporizes.
*When an energized vapor is compressed, heat is released.
*When a hot vapor is cooled it returns to a liquid state.
HERE'S HOW IT WORKS:
Heating Mode
*Liquid refrigerant passes through a series of underground copper tubes (tubes can be either vertical, horizontal or diagonal).
*Energy (measured in the form of B.T.U.'s) from the earth passes through the sides of the tubes and into the refrigerant, causing it to vaporize.
*The energy saturated vapor then moves to the Active Charge Control (A.C.C.) ensuring that only vapor and no liquid passes into the system.
*The actively charged vapor then enters the compressing unit and becomes heated through the compression process.
*The newly heated high pressure vapor then moves to another series of copper tubes (Condensing Unit) where air, supplied by the cold air return portion of the duct work, is forced by a fan between these tubes.
*As a result, heat transfers into the air and is sent to the heat registers throughout the house, the vapor in the tubes is cooled and condensed back into its original liquid state.
*It then moves to the Liquid Control Valve (L.C.V.) which ensures only liquid returns to the earth loops.
*Once liquid returns to the earth loops the process begins again.
Cooling Mode
The components are the same as in the heating mode only the process is reversed through the use of the system's reversing valve.
* High pressure refrigerant vapor passes through a series of underground copper tubes, where the coolness of the earth causes it to condense into a liquid (earth is the condensing unit).
* The liquid refrigerant is admitted through the Liquid Control Valve (L.C.V.) and moved through a seried of copper tubes in the house (Evaporator Unit).
* Warm/hot air within the house circulates through the air return portion of the duct work and is froced by a fan between these tubes.
* Heat from the air (measured in the form of B. T. U.'s) passes through the sides of the tubes and into the refrigerant, causing it to vaporize.
* the energy saturated vapor then moves to the Active Charge Control (A.C.C.) and on to the compressing unit, where it is compressed and moves back out to the earth loops and continues the condensing/vaporizing cycle.





