Mijnwater starts drilling for new heat source on Terhoevenderweg in Heerlen New source expands Parkstad’s district heating and cooling network Mijnwater has started drilling work for a new heat source at Terhoevenderweg in Heerlen, marking another important step in the expansion of its sustainable heating and cooling network in Parkstad. After a period of preparation, work began this week and is expected to continue for three to four weeks. Because the operation must be completed safely and efficiently, the drilling is taking place 24 hours a day, seven days a week. The project is part of Mijnwater’s broader effort to strengthen a low-carbon energy system for the region. The new source will tap warm groundwater in a former mine passage deep underground and feed that energy into the company’s network. For Heerlen and the surrounding area, this means further development of a district energy system that draws value from the region’s mining past while supporting a more sustainable energy ...
Germany’s Geothermal Breakthrough: AFK Launches Game-Changing Deep Drilling in Munich’s East – 2026’s Biggest Heat Revolution
Geothermal Energy in 2026: Germany's AFK Geothermie Launches Major Deep Drilling Expansion East of Munich , A Blueprint for Reliable Renewable Heat
Imagine a quiet industrial site near Munich's eastern suburbs suddenly dominated by a towering 40-meter drilling rig in 2026. Beneath the surface lies a vast reservoir of hot water at around 90°C, ready to deliver clean, baseload heat to thousands more homes and businesses. This is the reality unfolding at AFK Geothermie GmbH in Aschheim, where Germany's first inter-municipal geothermal project is gearing up for a transformative second deep drilling campaign. As Europe pushes for energy independence and net-zero heating, this Bavarian initiative stands out as a practical model: community-owned, resilient, and increasingly fossil-fuel-free.
The Pioneering Roots of AFK Geothermie
Founded in 2008 by the neighboring municipalities of Aschheim, Kirchheim, and Feldkirchen, AFK Geothermie was a trailblazer the first cross-community geothermal venture in Germany. Tapping into the Malm carbonate aquifer at depths of about 2,100–2,700 meters, the system has reliably supplied district heating to roughly 1,700 buildings serving 31,000 residents. The closed-loop setup extracts hot thermal water, transfers its heat to the local network via exchangers, and reinjects the cooled fluid underground sustainable by design with near-zero emissions.
For over 15 years, AFK has provided stable, eco-friendly warmth. Yet recent global events exposed vulnerabilities: Russia's invasion of Ukraine caused gas prices to skyrocket, driving explosive demand for alternatives. AFK's existing mix—about two-thirds geothermal and one-third natural gas backup—led to higher customer bills during price spikes, sparking complaints and highlighting the risks of hybrid reliance.
The Transformation Plan: Second Drilling as the Game-Changer
In response, AFK unveiled its comprehensive "Transformation Plan." The centerpiece? A second geothermal doublet (one production well and one reinjection well) to boost capacity and slash fossil fuel dependence. Once complete, the geothermal share could climb to 90–95%, enabling connections for up to 1,200 additional households and businesses while stabilizing long-term pricing.
Drilling preparations are advancing rapidly in 2026. A prominent 40-meter rig will bore to approximately 2,600 meters (with total lengths around 3,600 meters due to directional paths), targeting the same productive Malm layer. Parallel to this, construction begins in spring 2026 on a second energy center for expanded heat exchangers, transformers, and infrastructure. Full operations are targeted for mid-2027, accompanied by network extensions and efficiency upgrades like compression heat pumps.
This isn't just expansion,it's a strategic leap toward full decarbonization. By 2045, AFK envisions operating entirely on renewables, potentially covering half the three communities' total heat demand. On-site photovoltaics for self-power are under discussion, further enhancing resilience.
Financing and Community Buy-In: Making It Happen
The €50 million project breaks down sensibly: €5 million from the municipalities, €20 million in enhanced grants/subsidies, and the balance via loans. Improved funding conditions finally overcame past hurdles, proving timely policy support can unlock geothermal potential.
Leadership, under Managing Director Martina Serdjuk, is emphasizing transparency and engagement. A refreshed brand—"Energie unter uns" (Energy Beneath Us)—features a modern logo, an upgraded website for tracking progress, price comparisons, and connection checks, plus public tours and events (including a November 2026 session in Kirchheim). As Feldkirchen Mayor Andreas Janson (current AFK supervisory board chair) reflected, the founders' foresight deserves credit—now the focus is on responsibly harnessing this underground "treasure."
Broader Implications: Geothermal's Role in Europe's Heat Transition
AFK's push aligns with Bavaria's leadership in deep geothermal district heating. The Malm reservoir under Munich's region offers stable, non-volcanic potential—unlike rift zones in Kenya (where Olkaria and Menengai dominate African output) or Iceland. With EU targets tightening and drilling risks mitigated by better tech and insurance, similar municipal projects could proliferate across non-volcanic Europe.
From a Nairobi perspective, it's inspiring: Geothermal proves scalable for baseload renewables anywhere with suitable geology. AFK demonstrates community-scale ownership can deliver affordable, secure heat while cutting imports and emissions—key amid volatile fossil markets.
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The Road Ahead: Drilling Starts, Future Brightens
As 2026 progresses, watch for that rig rising in Aschheim—a symbol of proactive energy transition. Lower bills, slashed CO₂, and expanded access await. In a world chasing reliable renewables, geothermal isn't flashy like solar farms or wind turbines—it's steady, always-available power from the Earth itself.
What role do you see for deep geothermal in your region's future? Share thoughts below, and stay tuned for more frontline updates from Alphaxioms Geothermal News!
Source: Sueddeu
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