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Investigation of Pre-cooling Strategies for Heavy-duty Hydrogen Refuelling


Green hydrogen presents a promising solution for transitioning from fossil fuels to a clean energy future, particularly with the application of fuel cell electric vehicles (FCEVs). However, the hydrogen refuelling process for FCEVs requires extensive pre-cooling to achieve fast filling times. This study presents experiments and simulations of a hydrogen refuelling station equipped with an adaptable cold-fill unit, aiming to maximize fuelling efficiencies. For this purpose, we developed and experimentally validated simulation models for a hydrogen tank and an aluminium block heat exchanger. Different pre-cooling parameters affect the final tank temperatures during the parallel filling of three 350 L type IV tanks. The results indicate significant potential for optimizing the required cooling energy, with achievable savings of over 50 % depending on the pre-cooling strategy. The optimized pre-cooling strategies and energy savings aid in advancing the refuelling process for FCEVs, effectively contributing to the transition to clean energy.

Funding source: The authors would like to thank the Climate and Energy Fund (KLIEN) and the Austrian Research Promotion Agency (FFG) for funding and managing the projects HERO (Nr. 878120) and ReHyB (Nr. 884312 from the “Mobility of the Future” program funded by the BMK).
Related subjects: Applications & Pathways
Countries: Austria

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