Lower Saxony Presents Proposal for Geothermal Guideline Facilitating Installation of Horizontal Ground Source Heat Pumps

The Office for Mining, Energy and Geology of the State of Lower Saxony (LBEG) and the State Ministry for Energy have published a proposal amending the “Guideline for the Use of Geothermal Heat in Lower Saxony” aimed at facilitating the installation of horizontal ground source heat pumps (Erdwärmekollektoren).

The amendment shall enable the installation of horizontal ground source heat pumps in ground water areas under certain conditions, making the use of this type of heat pump possible for the first time in many locations with a shallow ground water level, LBEG commented.

The 2012 Guideline for the Use of Geothermal Heat in Lower Saxony lays down the technical and legal framework for developers and clients. The proposal for an amendment takes into account that many modern horizontal ground source heat pumps do no longer represent a danger to ground water, LBEG says, pointing out that so-called spiral heat pumps can be embedded in clay or other dense materials that prevents leakage of the mixture of water and anti-freeze used in the heat pump into ground water.

In January LBEG updated the map „Requirements for the Use of Near Surface Geothermal Energy” (“Nutzungsbedingungen oberflächennaher Geothermie”), which is available on the internet. The map is the main tool for establishing the permitting requirements for heat pumps.

Source: Office for Mining, Energy and Geology of the State of Lower Saxony, press release, proposal for amendment of “Guideline for the Use of Geothermal Heat in Lower Saxony”

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