Safety design of hydrogen vent system for emergency response in hydrogen fueling station using physical modeling

Abstract

In recent years, hydrogen fueling stations are being constructed to expand the hydrogen society. Risk assessment is required for safer hydrogen fueling stations. There are several types of hydrogen fueling stations, such as on-site type stations and off-site type stations. The target of risk assessment in this study is the on-site hydrogen station using an organic chemical hydride method. The purpose of this study is to reveal unique serious incident scenarios in the station and propose new safety measures. As a result, a serious incident scenario that a rupture of hydrogen tank may occur due to pool-fire at an organic hydride system was revealed. For preventing the scenario, hydrogen in storage tank must be released quickly and safety into atmosphere from a vent system. We verified the safety of existing vent systems, and suggested new vent systems using physical modeling software (SimulationX) to reduce the risk of the serious incident scenario.