Quote:
Originally Posted by tigersaw
I thought ground source heat pumps were supposed to use compressed gas, and by taking 1 degree out of a large area they could heat a small area by 10 degrees or whatever, like a fridge in reverse?
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They do.
A lot of them use an intermediate "loop" of antifreeze or whatever to transfer the heat from the ground to the cold side of the machine where the working fluid is (same stuff as air-con gas)
Basically on the cold coils, heat is caused to flow to the low temperature (outside)... then when you compress the gas (inside the house, effectively) it heats up the hot coils, and the heat you collected outside is transferred to the house (into the central heating circuit or whatever).
The performance is heavily dependant on the temperature of the hot and cold sides... the bigger the difference the lower the performance. That's why ground source is supposedly better, the ground stays warmer than the air. Hence my confusion at small clangers post that people hate the ground source ones.