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COSMHYC and COSMHYC XL are research projects.



The COSMHYC series includes three projects developing, prototyping, and demonstrating an innovative compression solution for hydrogen, based on the optimal combination of mechanical and metal hydride compression technologies.

  • COSMHYC (completed): development, building and testing of the first COSMHYC prototype in an environment simulating the use in a hydrogen refueling station
  • COSMHYC XL (started 2019): optimization and scale-up of the COSMHYC compression solution for extra-large scale hydrogen refueling stations.
  • COSMHYC DEMO (started 2021): demonstration of the COSMHYC compression solution in a public hydrogen refueling station in Tours, France.

The COSMHYC project already achieved significant breakthroughs compared to the state-of-art. COSMHYC XL and COSMHYC DEMO are expected to further improve compression performances while reducing related costs. The entire series is funded by the Fuel Cell and Hydrogen Joint Undertaking of the European Commission.

Read more about the success story of the COSMHYC project series.



Hydrogen mobility is gaining unprecedented momentum. Although the number of hydrogen refueling stations (HRS) is increasing, the refueling infrastructure remains a major bottleneck. The compressor is the most challenging component in an HRS, in terms of reliability and costs. The COSMHYC projects series addresses this challenge with its innovative compression solution, specifically suited for hydrogen. The COSMHYC DEMO project will be a major step on this innovation journey as the compressor’s maturity for commercial application will be demonstrated.

Within the COSMHYC DEMO project, the COSMHYC compression solution will be further optimized and integrated into a public HRS in Tours (France). This HRS will be a central part of HySOPARC, an initiative implemented by CCTVI (the grouping of municipalities of the Touraine Vallée de l’Indre area) for driving regional development based on H2 technologies. The HRS will supply a fleet of 700 bar passenger vehicles, 350 bar utility vehicles and a 700 bar garbage truck. This is a great opportunity to demonstrate the effectiveness and versatility of the COSMHYC innovative compression solution.



For demonstrating the COSMHYC compression solution in real operational conditions, the COSMHYC DEMO project will focus on:

  • Design and construction of the hydrogen refueling station, integrating the COSMHYC hybrid compressor
  • Operation of the refueling station to demonstrate the maturity of the COSMHYC compression technology

The objective is to demonstrate reliability, efficiency, and low noise level of the COSMHYC compression solution in real condition, as well as reduction of costs of compression and related costs of hydrogen refueling.



With the integration of the COSMHYC compressor into a real-life hydrogen refueling station, the project COSMHYC DEMO will demonstrate the maturity of the technology and contribute the roll out of FCEV mobility by extending the regional and European HRS network.

Servicing a fleet of FCEV with Green Hydrogen, COSMHYC DEMO will contribute to the European Union’s Energy Strategy of cutting least of 40% of greenhouse gas emissions until 2030.


While most conventional hydrogen compressors use a mechanical effect, metal hydride compressors use a thermal effect instead: the hydrides absorb low pressure hydrogen at low temperature and release high-pressure hydrogen at high temperatures, enabling to reduce maintenance costs and noise disturbance, and to replace the use of electricity with waste heat. Coupling a metal hydride compressor and a mechanical compressor enables to combine the high flow rates and flexibility of mechanical compressors with the reliability and energy efficiency of metal hydrides, enabling an overall cost-efficient solution.