Coupling heat pumps to the cold source (installation rules)
Heat pump: technologies and applications in the residential sector

This solution may require an intermediate brine circuit between the heat pump and the ground.

The main advantage of soil as a heat source is the stability of its temperature throughout the year, as soon as you reach a depth of a few tens of centimetres, as shown in figure 30 : while at the soil surface, the amplitude of temperature oscillations follows those of the air, damping is very rapid as a function of depth, and from...