Summary
- Deerns is working with TTSP on Data4’s 180MW Hanau campus, planned on a 25-hectare former military site.
- The engineering scope covers grid strategy, on-site substations, cooling, waste heat recovery, district-heating compatibility, and material reuse.
- The campus places German AI capacity growth inside a wider debate over powered land, heat export, resilient electrical design, and buildability.
Deerns is working with TTSP on engineering design for Data4’s planned 180MW AI data centre campus in Hanau, bringing one of Germany’s larger capacity projects into the detailed layer of power, cooling, and infrastructure planning.
The campus is planned on a 25-hectare former military site in the Rhine-Main region. Data4 has described the scheme as its first German mega-campus, with the site intended to support cloud and AI workloads and strengthen the region’s role as a European digital infrastructure node.
Deerns’ integrated design work covers power architecture, grid connection strategy, on-site substations, cooling, waste heat recovery, district-heating compatibility, and material circularity. The engineering brief is set out in Deerns’ Hanau project note.
Power design comes before capacity
The Hanau campus carries the familiar headline number — 180MW — but the useful detail sits in the systems around it. A campus of that size needs more than a large grid connection. It needs a staged electrical architecture that can support phased growth, redundancy, maintainability, high-density AI workloads, and future changes in rack power without forcing major redesigns.
Deerns’ scope includes on-site substations and future-proofed power infrastructure, which puts the project where Europe’s data centre constraint now sits. Operators can identify demand and capital more easily than they can secure, energise, and operate large power connections. Germany’s leading data centre regions already face competition for grid capacity, substations, transformers, and qualified engineering labour. A 180MW campus must therefore be designed as an energy system as much as a real estate development.
Cooling and heat export are also present from the start. Deerns says the campus is being designed with waste heat recovery concepts that are technically compatible with district heating networks. That early integration is crucial because heat reuse is hard to add cleanly after a facility has already been designed around conventional heat rejection. Temperature levels, pipe routes, exchanger design, mechanical plant, and the presence of a nearby heat offtaker all influence whether useful heat can leave the site.
Hanau also shows how German data centre projects are being pulled into a wider civic and industrial frame. A former military site offers land and scale, but the public case for a large AI campus will be shaped by more than digital demand. Power consumption, local heat use, construction materials, grid reinforcement, and long-term employment all become part of the project’s footprint.
Reuse moves from claim to construction task
Material circularity gives the scheme another practical dimension. Deerns says the project aims to reintegrate recycled demolition materials into the campus construction. That does not remove the embodied carbon challenge of a large data centre campus, but it moves the discussion into measurable construction decisions: what is demolished, what can be reused, where it can be used, and how material quality is verified.
Large campuses are increasingly judged across both operational and embodied impacts. Power and PUE still dominate sustainability discussion, but concrete, steel, earthworks, cable volumes, plant replacement, and demolition waste are gaining visibility. Where projects are built on former industrial or military land, reuse strategies can reduce waste movements and link redevelopment to lower-carbon construction practice.
The project also sits within Germany’s sovereignty and resilience debate. AI and cloud capacity are now treated as industrial infrastructure, not a back-office IT issue. Facilities capable of hosting dense compute loads need to be close enough to users, networks, power systems, and legal jurisdictions to satisfy commercial and policy requirements. That turns engineering design into part of Germany’s digital capacity strategy.
Hanau still has to pass through the realities that define European delivery: grid connection, equipment procurement, permitting, contractor capacity, local acceptance, commissioning, and operational proof. Engineering does not guarantee a campus will be delivered on schedule, but it is where the claims made in planning and investment decks are either translated into buildable systems or exposed as weak assumptions.
