Groß Schönebeck, Germany to be the site of novel geothermal well design deployment
Diagram of the Heat4Ever technology (source: Green Therma)
Carlo Cariaga
13 Jan 2026
Green Therma will be deploying their DualVac co-axial geothermal well design with vacuum installation for the first time in Groß Schönebeck, Germany.
The district of Groß Schönebeck in Brandenburg, Germany will be the site of the first installation of Green Therma‘s DualVac technology, a deep geothermal single-well co-axial well design that uses continuous vacuum insulation to minimize heat loss.
The project will start in 2026 and will involve the installation of the well to depths of over 3 kilometers, where temperatures above 100 °C are expected. This will be followed by a year-long test where the system will be measured, monitored, and challenged.
“This project represents a milestone in geothermal energy extraction technology,” says Jørgen Peter Rasmussen, Founder and CEO at Green Therma. “By demonstrating DualVac™ insulation performance at Groß Schönebeck, we are taking a major step toward making deep geothermal heat accessible, efficient, and scalable on a global level.”
The company’s patented Heat4Ever™ solution, with DualVac™ at its core, was developed around the idea that deep geothermal can be extracted anywhere given the right technologies. Green Therma had also previously received funding for a full-scale demonstration of the Heat4Ever technology in Aalborg, Denmark, as ThinkGeoEnergy reported.
The technology was developed in collaboration with GFZ Potsdam as part of the European TRANSGEO initiative, which aims to explore how existing wells can be repurposed for geothermal heat extraction and storage.
“Close cooperation between industry and research is essential for developing next-generation geothermal solutions,” says Prof. Dr. Ingo Sass, Head of the Geoenergy Section at GFZ Potsdam. “Partnerships like this is crucial for moving geothermal energy forward.”
Source: Green Therma
