This link provides info on the geothermal heat exhchanger system.
http://en.wikipedia.org/wiki/Geothermal_exchange_heat_pump
Its very much the basic exchanger system.
Can anyone explain to me how heat is extraced from the house during the cooling process??
1-Heat is a energy, cold is a lack of heat energy.
if you take something that is cold and place it in a hot room the object will absorb heat,until the object is as warm as the room.
2- if you compress a liquid it will heat up. then you run air around it the air will absorb the heat from the compressed liquid.
3- when you rapidly expand this liquid it will cool off but since heat was absorbed during the compression stage it will be cooler than before. so when you blow air around it it will absorb the heat from the air and produce cooler air.
The heating coils are used as cooling coils. The coolant flows through them and then is pumped into the heat exchanger in the ground where it heats up the ground water.
well u see, its very simple, blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah, and that is how heat is extracted from the house during the cooling process.