The verification of failure-free refuelling systems with 100 % availability is a prerequisite for the sustainable operation of refuelling stations. The aim of the “Research operations of hydrogen refuelling station Sachsendamm” project is thereby the examination of the Sachsendamm refuelling station in regard to the durability and resistance to ageing of system components used under capacity and in comparison with conventional pressurised gas technology.
A focus is placed on safeguarding operational availability and particularly on testing the technological concept in terms of the entire plant’s vulnerability during periods of working under capacity as is anticipated over the coming years. The technology concept used involves the delivery of liquid hydrogen (LH2) and conversion via a 900 bar cryogenic pump. In this way, compressors needn’t be implemented, which often comprise a particular area of vulnerability in other concepts and decisively contribute to long, marketincompatible outages.
Within the scope of the project, a large-scale validation of the concept – supported by the comprehensive collection and evaluation of data – is being conducted, especially in regard to: operating and service costs; plant efficiency; as well as the operational reliability of the components and their serviceability. In addition, further improvements to the technology, based on the experiences made in the preceding project (optimised hydraulic concept) are being tested. The principal innovative subcomponents of the system include: the cryogenic pump; the on-site temperature management using cryogenic LH2 for precooling the hydrogen to be dispensed; and the underground installation of the system technology in order to reduce the system’s space requirements. Furthermore, due to the age of the plant, an inspection by TÜV Rheinland is necessary. As tests must be conducted without disruption, Shell will develop its own testing process in collaboration with TÜV Rheinland.