Sustainable operation of large geothermal heat pump systems by regeneration with solar, environmental and waste heat

Geothermal heat pumps with borehole heat exchangers (BHE) can contribute significantly to the future energy supply based on renewable resources. They can sustainably supply space heating, hot water and air-conditioning due to their energy efficiency. The “Geo-Resume” research project aims to analyze the actual behavior of existing borehole heat exchanger fields during operation and the technical and economical potentials for their optimization. For this purpose, metrological investigations will be carried out, the results of which will be evaluated and generalized by means of models.
Within the scope of the project, we will develop basic principles for the sustainably efficient operation of large BHE fields. The goal is to improve the evaluation basis for planning, approval and operation of BHE fields and to provide concepts that enable sustainable and performance-optimized operation – e.g. by means of thermal regeneration. For this purpose, a status quo analysis of realized plants is carried out on the basis of a monitoring campaign. By means of modeling and simulation, the energy transports between the plant and the geological subsurface will be rationalized and evaluated. The models are validated on the basis of the monitored plants and thus provide a reliable basis for the evaluation of instrumental and procedural measures, which leads to the optimization of geothermal plants. The main focus here lies on measures for thermal regeneration.
The goals are:

  • Developing an appropriate monitoring system and a procedure for the status quo analysis of the subsurface
  • Providing information for licensing practice and a generalizable economic-technical evaluation of the measures as a decision-making aid
  • dPreparing a planning tool for new plants with regeneration or for the operational optimization of existing plants.


Collaborative research partner:

Geowissenschaftliches Zentrum der Universität Göttingen, Abt. Angewandte Geologie, 37077 Göttingen, Germany Logo Uni Göttingen


Cooperation partners- public geological offices:

Niedersachsen: Landesamt für Bergbau, Energie und Geologie, 30655 Hannover, Germany Logo LBEG
Schleswig-Holstein: Landesamt für Landwirtschaft, Umwelt und ländliche Räume, 24220 Flintbek, Germany Logo Geo-SH
Hamburg: Behörde für Umwelt, Klima, Energie und Agrarwirtschaft, 21109 Hamburg, Germany Logo BUEKA-HH
 
Bremen: Geologischer Dienst für Bremen, 28359 Bremen, Germany Logo GDfB
 
Sachsen: Sächsisches Landesamt für Umwelt, Landwirtschaft und Geologie, 01311 Dresden, Germany Logo Geo-SN

Cooperation partner – engineering offices for geothermal plants:

iNeG IngenieurNetzwerk Energie eG, 49186 Bad Iburg, Germany Logo iNeG
geoENERGIE Konzept, 09599 Freiberg, Germany Logo geoENERGIE Konzept
tewag: Technologie – Erdwärmeanlagen – Umweltschutz GmbH, 93055 Regensburg, Germany  Logo tewag
Geo-En Energy Technologies GmbH, 10829 Berlin, Germany Logo geo-en
Mull und Partner Ingenieurgesellschaft mbH, 30173 Hannover, Germany  Logo Mull und Partner
H.S.W. Ingenieurbüro: Gesellschaft für Energie und Umwelt mbH, 18055 Rostock, Germany Logo H.S.W.


Duration of the project:

01.02.2021 – 31.01.2024


Funding:

The collaborative research project “sustainable operation of large geothermal heat pump systems by regeneration with solar, environmental and waste heat” (Geo-Resume) is funded by the Federal Ministry of Economics and Energy under the reference number 03EE4021A on the basis of a decision of the German Bundestag. The authors alone are responsible for the content of this publication.

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