From Vision to Innovation Product

Unlocking Geothermal Energy: The Multi-U-Tube Probe is a validated technology with documented up to 35 % higher heat extraction compared to standard double-U-tube probes.

After years of development, we now manufacture this highly efficient technology in project-specific quantities at our pilot facility in Gommern. The production of prototypes proves: this innovation is ready for the next step.

Cross-section · Multi-U-Tube Probe

Ten outer pipes
One central pipe
Borehole boundary
35%
More heat extraction
up to −1,700€
Cost advantage per 100 m borehole
SCOP 7.20
Heating + Cooling
Simulation
673
MWh/a
Heat output
Simulation

Field measurement results

No estimates — documented measurement data from multiple reference projects.

35%
More heat extraction

35 % higher heat extraction enables shorter boreholes at the same extraction capacity — decisive where regulatory depth limits apply.

+33%
More heat transfer surface

10 concentric outer pipes create a 30–35 % larger contact area with the ground — within identical borehole geometry.

up to −1,700 €
Cost advantage per 100 m borehole

Advantage per 100 m borehole compared to a double-U-tube probe at equivalent thermal performance — a relevant margin in series production.

Einbau einer MU-Sonde im Feld

All advantages in detail →

Long-term forecast
over 100 years

Simulation results of a 25×4 probe field
BLZ Geotechnik GmbH / TU Freiberg / Transflow GmbH.

673
MWh/a
Heat output

673.3 MWh/a vs. 507.1 MWh/a for double-U — +33 % more annual energy over the entire simulation period.

7.20
SCOP
Heating + Cooling

Combined seasonal coefficient of performance with regeneration. Pure heating SCOP is comparable (4.14 vs. 4.16) — the advantage lies in capacity.

91.9%
Regeneration efficiency

Cooling capacity 287.7 kW vs. 220.9 kW — the enlarged surface works bidirectionally: more extraction in winter, better regeneration in summer.

Simulation details →

Production Line
Gommern

In Gommern, an operational production line for series manufacturing is ready. The technical performance records come from multiple reference projects at different locations.

View production line →

Get in touch

The technology is validated. The production line is ready. Whether you are a driller, manufacturer, end customer or authority — we look forward to any exchange.