Dynamic physical model of Japanese hydrogen refueling stations for quantitative trade-off study between benefit and risk

As hydrogen refueling stations come into increasing use and being common, both benefit and safety are required. To promote its use, an optimized trade-off must be reached for hydrogen station configurations. We constructed a dynamic physical model of the station that enables quantitative evaluation of benefit and risk for a trade-off study, aiming to formulate a technical standard for hydrogen refueling stations that would realize highlevel safety and rationalize the equipment configuration and operation. The proposed model enables a quantitative evaluation of both the hydrogen refueling time during normal operation and external leakage under several accident scenarios. This paper discusses the modeling concept and approach of the proposed model and reports quantitative verification results of the proposed model based on past experimental test results. In this study, capability of the proposed model for quantitative evaluation of dynamic behavior of hydrogen during refueling operation at the station reflecting its configuration andoperation condition was demonstrated. This feature of the proposed model also provides a physical and realistic dynamic leakage rate for calculating individual risks compared to the conventional risk analysis method.(c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.