Heat from the ground for MAN

Created: 11/22/2022, 5:50 p.m

MAN wants to supply its location on the Karlsfeld municipal boundary with heat from the earth's interior.

© Sven Hoppe/dpa

MAN's geothermal project was presented at the most recent meeting of the Karlsfeld construction and works committee.

Karlsfeld – MAN wants to supply its location on the Karlsfeld municipal boundary with heat from the earth's interior.

The most recent meeting of the Karlsfeld construction and works committee dealt with a corresponding application from the company.

In order to be able to heat with geothermal energy, a suitable location for deep drilling must always be found beforehand.

This is risky and expensive.

The companies opportunities@friends GmbH, Garching and MAN Truck & Bus SE Munich want to try such an attempt in the so-called Karlsfeld-Nord permit field, which is mainly in the Dachau area.

At the meeting, the municipality informed about an application by the two companies for a permit under mining law.

In this way, MAN wants to supply its location with geothermal energy.

The Munich area is basically suitable for this, which is why Stadtwerke München already operates four such geothermal power plants in and around the state capital and uses them to generate heat and electricity.

The current application from the two companies also aims to pierce through the Malm-Carbon layers in the ground with a so-called production well.

They want to drill 3,000 meters deep and hope to find hot water down there.

This should then be pumped to the surface of the earth in order to make its heat usable here via a heat exchanger.

The hot deep water itself is not used, but is pumped back to a depth of around 2,800 meters using a second borehole, the reinjection borehole.

Since the deep water is only slightly cooled in the heat exchanger, according to the application, this is only a small ecological intervention.

With this deflection well, the experts speak of a geothermal doublet that emanates from the same well site.

If MAN and its partner find what they are looking for, they still have to have a thermal mining report drawn up and apply for a permit under mining law for final use.

It is also checked whether there could be seismic effects.

Like all the authorities and municipalities involved, the district office of Dachau and the municipality of Karlsfeld have now been informed so that they can comment on the project.

The municipality of Karlsfeld had already secured such a claim for itself.

But because she had not become active, the claim fell back after five years and was applied for by another investor.

At the time, he probably hoped that if his search drilling was successful, he would be able to sell the heat to Karlsfeld.

But then the municipality found a more cost-effective and less risky solution with today's biomass cogeneration plant on Parzivalstraße and thus built up district heating in the municipality.

Later, the Maschinen-Turbinen-Union (MTU) used this former Karlsfeld claim for itself next to the MAN factory premises in Munich-Ludwigsfeld.

Reinhard-Dieter Sponder

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You can find more current news from the district of Dachau at Merkur.de/Dachau.