So far, the development of Type V cylinders has yielded promising results. The technology has demonstrated its reliability, and the performance achieved to date is encouraging. We have successfully created a Tube monolithic structure using thermoplastic composite tapes, achieving a gravimetric index exceeding 7%. Two versions of the cylinder have been developed: one with a liner and one without.
Key improvements demonstrated thus so far include :
- Gravimetric Index: Enhanced gravimetric index.
- Monolithic Structure: A monolithic structure where the liner is an integral part of the composite.
- Boss Design: An improved boss design, allowing for easy replacement i the case the thread is damaged (for instance).
- Key parameters for the decontamination have been identified: It has been possible to achieves 5 µmol/mol water content with standard equipment in a Type V cylinder, making it compatible with fuel cell applications.
The design of the Multi Element Gas Container and its demonstrator is now finalised. It is projected to transport 1.5 tons of gaseous Hydrogen, with the precise amount to be determined once we have a more accurate estimate of the Type V composite cylinder's weight at 700 bar working pressure.
Furthermore, the analysis of Regulations, Codes, and Standards for trailers and Hydrogen Refueling Stations (HRS) has been completed, revealing no major issues. This work provides recommendations (regarding regulations and norms) to use such trailer design at hydrogen refueling stations. From a safety perspective, we identified three primary accidental scenarios leading to hydrogen release: hose rupture, leakage on filling hose, or piping failures. Mitigation measures have been proposed.
A Life Cycle Analysis has been conducted on Type I (metal), Type IV and Type V trailers. The analysis demonstrates that Type V trailer generally delivers the best environmental performance, particularly at medium and long transport distances, due to its higher transport capacity.
