In the context of defining protocols for the fueling or defueling of composite material hydrogen pressure tanks, it is crucial to not exceed certain temperature limits. 85°C during fuelings is the upper boundary that the gas temperature should not exceed during the refueling of hydrogen cars in the standard SAE J2601-2014. In the same manner, usual defueling recommendations suggest that the lower gas temperature boundary is-40°C. The project HyTransfer, an FCH JU funded pre-normative research project, aims at showing that setting these two limits on the wall temperature rather than on the gas temperature permits to diminish operational constraints and therefore obtain a significant improvement of the overall costs for fueling and defueling.
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