Heat pumps TERRAGOR

• Geothermal energy recovered by a ground collector or vertical/borehole heat exchanger
• Temperature at a depth of over 1.2 meters does not fall below 0°C
• Installation of heat pump in a dry room with temperature above 0°C
• Option of heating, cooling, and heating of sanitary water
• Availability of energy source throughout the year
• Monovalent operation mode
• Simple electronic control of the system
• Allows two independent hydraulic circuits

Brine/water heat pumps make use of the energy accumulated in the soil. The energy is recovered from the soil using a ground heat collector laid over an adequately sized surface. For optimum operation, the collector surface must be approximately twice the size of the heated area. The amount of energy retrievable from the soil depends on soil composition and position. It is important that the surface on which the ground collector is laid is not built on or asphalted; in other words that nothing obstructs the passage of precipitation through the surface.

TERRAGOR heat pumps are highly economical and they reach COP values over 4.5. The difference between input temperature of the medium (water + glycol) and output temperature at the collector is approximately 4°C.

To install a horizontal ground collector, a suitable ground surface is required to allow free passage of precipitation water. The required size of the collector can be roughly calculated as follows: heating pump heating power (in kW) × 40. Required cross-section of PE pipe is 1” and they must be laid approximately 120 cm below ground surface level, with a gap of 0.7 to 0.8 meters between the pipes.

If the surface available to build a horizontal ground collector is not sufficient, a vertical/borehole heat exchanger can be drilled to make use of the geothermal energy. Approximate required depth of the borehole can be calculated as follows:
heat pump heating power (kW) × 14 = borehole depth (m)

In the brine/water heat pump system, minor adjustments can also be made to allow passive cooling. In this case, relatively low soil temperature is used to cool the rooms. During passive cooling, the heat pump is not in operation, which allows minimum energy consumption for cooling and thus, compared to conventional air conditioning, much lower electricity bill.