Conceptual Design for a 5 MW Green Hydrogen Plant in Croatia
Designing Croatia’s next landmark in renewable hydrogen
H2 Axis Infrastructure d.o.o. is developing a pioneering 5 MW green hydrogen production facility on a one‑hectare site near Bjelovar, Croatia. AFRY provides the conceptual design and strategic technical groundwork essential for investor onboarding and the early stages of permitting.
A Site Ready for Renewable Transformation
Situated on a strategically positioned one‑hectare site near Bjelovar, the project benefits from strong utility integration potential and proximity to future industrial hydrogen off‑takers. AFRY initiated its work by compiling a detailed Base Data Report (BDR), capturing everything from site conditions and infrastructure interfaces to regulatory expectations and environmental considerations. This enabled the engineering team to advance with equipment definition, process modelling and layout development. The conceptual design includes a 2D master layout, a 3D plant model and a CAPEX overview, with finalization set for 26 September 2025.
Why This Project Matters
As Europe accelerates toward a climate‑neutral energy system, green hydrogen is becoming a cornerstone of future‑proof energy strategies. In Croatia, this project supports national ambitions for renewable diversification and energy security. By enabling local, emission‑free hydrogen production, the facility strengthens regional resilience, reduces dependency on imported fossil fuels and supports the formation of a new industrial value chain. With its scalable design and strong technical underpinnings, the Bjelovar plant may well become a flagship reference for hydrogen development in Southeast Europe.
Green hydrogen will play a central role in Europe’s energy future. We are delighted to support this project with our expertise and help accelerate Croatia’s path toward a sustainable and resilient energy system.
Jose Torres Carmona, Regional Director for EMEA Renewables & Energy and SVP, Head of Segment Thermal
AFRY’s Contribution: Expertise That Shapes the Outcome
Working across disciplines, AFRY brings together engineering excellence and deep hydrogen market insight to deliver a robust conceptual design.
Laying the Groundwork: Data, Context and Conditions
AFRY structured the foundational dataset required for engineering by analyzing site characteristics, utility availability and logistical constraints. The team also assessed relevant market conditions, hydrogen policy developments and Croatian regulatory frameworks. Early identification of permitting considerations ensured alignment with authorities and reduced project risk.
Engineering the Technology Backbone
Guided by the BDR, AFRY defined the technological parameters for major systems such as water treatment, electrolysis, hydrogen purification and storage, cooling, wastewater treatment and chemical dosing. Technical specifications for each system were developed to enable accurate sizing, integration planning and safety considerations.
Delivering a Complete Conceptual Design Package
The resulting conceptual design brings together all disciplines into a unified project view. A comprehensive plant layout illustrates operational flows, safety distances and equipment positions. A 3D model helps stakeholders visualize the future facility with clarity and confidence. Combined engineering arrangements, process, mechanical, electrical and civil, ensure the project is ready for the next steps in development. A CAPEX estimate rounds out the package, supporting early financial planning.
Visualizing the Story for Stakeholders
AFRY also produces high‑quality renderings and visual communication materials for investors, permitting authorities and the public. These assets help clarify the project’s purpose, strengthen decision‑making, and improve transparency, contributing to a compelling and credible project narrative.
What Comes Next
With the conceptual design complete, the client is well equipped to proceed into permitting, financing and detailed engineering. The development marks an important milestone for Croatia, supporting the emergence of a cleaner energy system and the growth of a hydrogen‑based industrial ecosystem.
Did You Know?
Green hydrogen is projected to supply as much as 20–25% of global energy demand by 2050 and is vital for decarbonizing hard‑to‑electrify industries.
Facts:
Project Name: Conceptual Design for a 5 MW Green Hydrogen Production Plant, Bjelovar
Client: H2 Axis Infrastructure d.o.o. (SPV)
Project Location: Bjelovar, Croatia (1‑hectare project site)
Project Duration: 2025-2025
Installed Capacity: 5MW (green hydrogen production)
The services comprise the preparation of a conceptual design, including:
- Compilation of relevant project environment (market, politics, etc.)
- Technology selection
- Conceptual design
- Cost estimate for infrastructure and equipment
- 3D rendering of the plant
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