The ground stocks solar energy throughout the year. This constantly replenished source of energy is thus available and recoverable by a WATER-TO-WATER heat pump.
circulate a fluid through buried pipes which absorb heat contained in the ground and carry it to the heat pump.
Dimensions of the loop
Firstly, the surface area of land available for the loop should be 1.5 to 2 times the surface area to be heated. For example: to heat a 130 m2 house, 200 to 260 m2 of loop is necessary.
Different types of horizontal loops
3 types of loop are generally used:
|Average recovered capacity according to loop type (watt/m)|
|Configuration||Per metre of trench (W/m)||Per metre of piping (W/m) ||Per m2 of land (W/m)|
|2-pipe loop||30||15* ||30*|
(*) For regions in which the outdoor temperature can drop to -10°C, the values are 12W /m and 30W/m2
These values are indicative; they depend on the nature of the land.
|Obstacles||Minimum distance in metres|
|Non-hydraulic sunken networks||1.5|
|Foundations, wells, septic tanks, etc.||3|
|Geothermal energy||Heat pumps||Groundwater heat pumps||Horizontal loop|