Groundwater heat pumps

The method of heat storage from groundwater is theoretically the most effective one (groundwater temperatures are constant and high throughout the year; on average 8-12°C). In practice, this possibility is applicable for few installations only, as both the quality and amount of water pose technical problems.

Advantages:

Groundwater is a source of stable heat; no additional heating is necessary in order to meet heat requirements.

Disadvantages:

Extreme caution has to be exercised with regard to:

• Source water quality (possible corrosion and exchanger fouling).
• The ability of the borehole to maintain constant water flows, as the water is not discharged in the same place.
• Remember that the water pump reduces the COP (heating factor) with its own consumption.
• Environmental hazard!: These systems have an uncertain future. European legislation has ever stricter requirements regarding installations which could disturb or deteriorate the quality of groundwater.

Effectiveness:
Long-term reliability:
Installation:
Price: