Geothermal test project moves ahead in Germany

By Mike Hayes31 August 2021

Technological advances give hope to ambitious deep-earth pipe system in Bavaria

A drilling rig on the site of the Eavor/Enex geothermal energy project in Geretsried, Bavaria. Image courtesy Enex

An ambitious geothermal project is moving ahead in the town of Geretsried in Bavaria, Germany.

The project involves the placement of a liquid-filled pipe system, within layers of hot rock, some 4.5km beneath the ground.

The liquid will be heated to a temperature of 120 degrees Celsius, before rising to the surface to provide energy for a surface power plant.

The project is the brainchild of Canadian technology company Eavor Technologies, which says it has upgraded its pilot Eavor-Loop system, following failed attempts to establish the test site in 2013 and 2017.

Enex Power Germany
The company recently formed a project development company with Enex Power Germany, with the aim of connecting its system to the grid, allowing it potentially provide power to the town of Geretsried.

Eavor’s Daniel Mölk said it proposed, following consultation with local residents, to commence drilling in 2022, to a depth of 4500m, before constructing four pipe networks and placing them deep into the rock.

Eavor believes the system could generate up to 8MW of electrical energy, at a cost of some €200 million.

The project is supported by the Oberland energy transition, a body with an aim of aiding the region move towards fossil-free fuel. The organisation has calculated that the proposed clean energy could save 40,000 tonnes of CO2 per year.

With a test facility already in operation in Canada, Eavor Technologies believes a successful roll-out of the system in Germany could initiate a fundamental change in the production of thermal energy.

Delivered directly to your inbox, World Construction Week Newsletter features the pick of the breaking news stories, product launches, show reports and more from KHL's world-class editorial team.
Longer Reads
5 ways to make remote working work
Keith Ali, MD at Creative ITC, explains how to overcome 5 common challenges when deploying remote working solutions to ensure AEC organisations realise business benefits from digital transformation.
COMMENT: Are we at the beginning of a golden decade in German construction?
Peter Gerstmann, chairman of the board of management of the Zeppelin Group discusses growing opportunities for the German construction sector
Can hydrogen engines turn construction green?
Hydrogen combustion engines move to centre stage as construction aims for zero emissions
Andy Brown Editor, International Construction Tel: +44 (0) 1892 786 224 E-mail:
Simon Kelly Sales Manager Tel: +44 (0) 1892 786 223 E-mail: