Authors

S. Schwarcz, C. Nagl, A. Ibrisevic, MAT Energy Systems GmbH, Vienna

Year

2026

Print Info

Production/Publication ÖVK

Summary

Decarbonising non-road mobile machinery (NRMM) operating at remote and frequently changing sites requires hydrogen refuelling solutions capable of 700 bar operation with limited supporting infrastructure. This paper presents a mobile 700 bar refuelling concept that generates dispensing pressure hydraulically using a liquid-displacement (liquid-piston) principle with direct liquid–hydrogen contact.

The approach aims to maximise the usable fraction of transported hydrogen and leverages the temperature reduction of residual gas during cylinder blowdown as an intrinsic effect that can reduce vehicle tank temperature rise during fast filling. A four-cylinder system model was implemented in Simcenter Amesim and benchmarked at the dispenser interface against measured 700 bar refuelling data. At an ambient temperature of −0.3 °C, the proposed concept refuels a representative three-cylinder vehicle storage system with approximately 1.1 m³ volume from 16.1% to 99% state of fill in 11.8 min, reaching a final tank temperature of 53.5 °C. Under the same boundary conditions, the reference case yields 41.6 °C with pre-cooling and 62.3 °C without pre-cooling, indicating that the intrinsic cooling effect can reduce external cooling demand for the investigated scenario.
…

ISBN

978-3-9504969-5-6

DOI

https://doi.org/10.62626/s9qk-5goq Copy link

Order Members Login