Alternative fuel vehicles are designed with larger quantities of combustible materials (e.g. fuels, plastics, synthetic materials, etc.) that present new and unique hazards, particularly in parking garages and vehicle carriers. To help provide informed guidance for the fire safety design of parking garages or other facilities where many vehicles are densely placed, the Fire Protection Research Foundation—the research affiliate of the National Fire Protection Association (NFPA)—is undertaking the third part of a three-phase project addressing sprinkler protection guidance for modern vehicle hazards in parking structures and systems.
Characterizing EV Hazards in Parking Structures to Inform Fire Safety Design Guidance: Full-Scale Testing, the third phase of the project, will involve characterizing the overall hazard of modern vehicles (e.g., heat release rate, or HRR, of internal combustion engine (ICE) and electric vehicles (EV)) and determining the overall impact of sprinkler protection on hazard mitigation through full-scale fire and sprinkler testing.
The experimental program aims to determine the optimal sprinkler design density to control vehicle fires and prevent spread to neighboring vehicles in a standard parking garage. The experiments conducted will provide crucial data on heat fluxes and fire spread in parking structures, informing fire protection practices and sprinkler design standards by providing data on what hazard classification in NFPA 13, Standard for the Installation of Sprinkler Systems is appropriate for ICE vehicles and EVs in a parking garage. They will also provide a better understanding of the full-scale fire behavior of modern vehicles in different variables and fire scenarios.
While vehicle fires in parking structures that develop into large-scale incidents are rare and the rate of civilian injuries is low, recent fires that occurred at Liverpool’s Echo Arena in the UK and Stavanger Airport in Norway involved hundreds of automobiles and resulted in severe structural damage, underscoring the damage and economic losses that can incur.
“Modern vehicles burn differently than traditional combustion engine vehicles, as a result of recent changes in vehicle design, materials, and motor technologies,” said Victoria Hutchison, a senior research project manager with the Foundation. “Recent events have highlighted the need to reclassify modern vehicle fire hazards based on results of large-scale fire testing and reevaluate recommended protection measures.”
