Revision of Modeling Scenario for Hydrogen Fueling Protocol under MC-MM 2023-01-0489

A new hydrogen fueling protocol called MC Multi Map (MC-MM) was developed to reduce hydrogen station operating costs. With the MC-MM, the number of fueling control maps has increased from before and precise switching among them according to circumstances has achieved relaxation of precooling temperatures. Fueling control maps for hydrogen stations are created in accordance with Society of Automotive Engineers (SAE) protocol, but with the MC-MM, greater accuracy of mapping is necessary, so steps were taken to revise the boundary conditions prescribed by the SAE. The creation of fueling control maps for a hydrogen fueling protocol used to require outsourcing of map analysis. However, the National Renewable Energy Laboratory research institute in the US has made a hydrogen fueling simulation called H2FillS publicly available on the Web so that analysis of fueling control maps can now be performed by anyone. Therefore, revision of the SAE boundary conditions was examined on the assumption that analysis would be performed using H2FillS. With regard to the fueling control maps newly added with the MC-MM, since the boundary conditions are not indicated by the SAE, those conditions were specified independently in this research. The fueling control maps created for use with the MC-MM were compared with the fueling control maps of existing protocols to confirm the influence from revising boundary conditions and switching to H2FillS as the analysis tool. Finally, the accuracy of the fueling control map created in this research was verified by conducting fueling tests in accordance with the MC-MM protocol using that fueling control map.