FLEX4H2 – Decarbonised Power​

Flexibility for Hydrogen (FLEX4H2) is a co-funded project by Clean Hydrogen Partnership, EU and Switzerland. It aims to develop a fuel-flexible combustion system capable of operation with any hydrogen concentration in natural gas, up to 100% H2.​ The new combustor design will be fully retrofittable to existing gas turbines, thereby providing significant opportunities for refurbishing existing assets.​
8 *


Ansaldo Energia, Edison, SINTEF Energy Research, CERFACS, ETN Global, ARTTIC Innovation, ZHAW, DLR

6 *


Switzerland, Italy, Norway, France, Belgium, Germany

4 *


January 2023 – December 2026

8.7 *

M€ Budget​

Funding EU: € 4,178,517.25
Funding Switzerland: CHF 4,012,475.00

6 *

Technology Readiness Level​

Technology demonstrated in relevant environment

Main impacts

New combustor technology for 100% hydrogen
Contribution to Net Zero pathway
Re-utilisation of existing infrastructure


Hydrogen combustion​
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Test rig and validations​
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Numerical modelling​
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Meet our partners


Breaking news! The first HP campaign successfully concluded!
04 Mar 2024

Click to watch the H2 combustion animation inside!

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Second General Assembly of FLEX4H2
21 Sep 2023

The project consortium met in Brussels on 19 and 20 Sept 2023

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ASME Turbo Expo 2024 – Unlocking a Net-Zero Future in Propulsion and Power
24/06/2024 - London, UK

Our first scientific paper will be presented!

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AGM & Workshop 2024 of ETN Global
19/03/2024 - Leiden, NL

FLEX4H2 project will be part of the expo

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Clean Hydrogen Partnership Co-funded by the European Union Project co-funded by Swiss Confederation
This project is supported by the Clean Hydrogen Partnership and its members Hydrogen Europe and Hydrogen Europe Research (GA 101101427), and the Swiss Federal Department of Economic Affairs, Education and Research, State Secretariat for Education, Research and Innovation (SERI)
Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union, Clean Hydrogen Joint Undertaking, or Swiss State Secretariat for Education, Research and Innovation (SERI). Neither the European Union nor any other granting authority can be held responsible for them.