The PRHYDE project started in January 2020 with a state-of-the-art analysis and the definition of specifications for heavy duty vehicle (HVD) fuelling (work package 2, WP2). This includes relevant requirements including aspects such as vehicle driving range, fuelling time, tank sizes, average kg/fill and, State of Charge (SoC) and commercial boundary conditions of typical HDV operators. In addition, an assessment of existing refuelling risk assessment analyses with focus on new concept approaches was performed as well as a gap analysis of existing hardware used in heavy duty gaseous hydrogen refuelling. Based also on a further gap analysis of existing gaseous refuelling protocols, targets for a future refuelling protocol were defined.
In WP3, concepts for hydrogen refuelling protocols of heavy-duty vehicles were discussed and developed. WP3 has provided and defined specifications for the modelling and experimental validation tests. In addition, a preliminary/partial safety and risk assessment of threats of the new refuelling protocols was performed- Based on the test results from modelling and fuelling tests, first draft protocol concepts were further optimized throughout the project.
In WP4, simulations for selected H2 tanks were performed. After preliminary calculations and the definition of measurement conditions during the first report period, specific CFD cases for the tanks and the injection system were tested and documented.
WP5 was responsible for the planning, preparation and performing several refuelling tests based on specifications of WP3. Accordingly, different hydrogen single tanks (35, 50 and70 MPa) were selected/purchased, equipped with thermocouples and tested at different test sites.
For stakeholder and expert discussions, six webinars/workshops and a survey have been organized in the context of WP6 (Recommendations and Dissemination). The results of the online webinars, surveys and final documents (results & recommendations) have been published as deliverables on the PRHYDE website. Furthermore several meetings with standardization organization (e.g. SAE FCEV Interface Task Force (ITF), ISO/TC 197/WG 24 or CEN TC 256 WG43) and exchange with other expert groups (i.e. CEP, CARA) were organized during the project duration.
