Risk assessment and ventilation modeling for hydrogen releases in vehicle repair garages

Ehrhart, Brian David; Harris, Shaun R.; Blaylock, Myra L.; Muna, Alice Baca; Quong, Spencer

doi:10.1016/j.ijhydene.2020.09.155

Risk assessment and ventilation modeling for hydrogen releases in vehicle repair garages

Journal Article · Tue Oct 27 04:00:00 EDT 2020 · International Journal of Hydrogen Energy

DOI:https://doi.org/10.1016/j.ijhydene.2020.09.155· OSTI ID:1671818

Ehrhart, Brian David ^[1]; Harris, Shaun R. ^[2]; Blaylock, Myra L. ^[2]; Muna, Alice Baca ^[1]; Quong, Spencer ^[3]

Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Quong & Associates, Inc., San Francisco, CA (United States)

The availability of repair garage infrastructure for hydrogen fuel cell vehicles is becoming increasingly important for future industry growth. Ventilation requirements for hydrogen fuel cell vehicles can affect both retrofitted and purpose-built repair garages and the costs associated with these requirements can be significant. A hazard and operability (HAZOP) study was performed to identify risk-significant scenarios related to light-duty hydrogen vehicles in a repair garage. Detailed simulations and modeling were performed using appropriate computational tools to estimate the location, behavior, and severity of hydrogen release based on key HAZOP scenarios. Here, this work compares current fire code requirements to an alternate ventilation strategy to further reduce potential hazardous conditions. Modeling shows that position, direction, and velocity of ventilation have a significant impact on the amount of instantaneous flammable mass in the domain.

Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States); Sandia National Laboratories, Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Fuel Cell Technologies Office

Grant/Contract Number:: AC04-94AL85000; NA0003525

OSTI ID:: 1671818

Report Number(s):: SAND--2020-10637J; 691127

Journal Information:: International Journal of Hydrogen Energy, Journal Name: International Journal of Hydrogen Energy Journal Issue: 23 Vol. 46; ISSN 0360-3199

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Risk Assessment and Ventilation Modeling for Hydrogen Release in Vehicle Repair Garages

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