2022 Volume 72 Issue 2 Pages 33-41
Nitrogen Enriched Air (NEA) is produced by removing oxygen from the air using a unique separation membrane. NEA is generally used as a substitute for nitrogen cylinders in industrial applications, and also application as a fire suppression system is in progress. However, when NEA is used as a fire suppression system, the behavior in the compartment may be stratified due to the influence of buoyancy since the supply rate of NEA is limited compared to general gas fire suppression system that uses high-pressure gas cylinders. In this paper, experimental study using a model compartment was carried out to reveal the injection and outflow conditions of NEA in which oxygen concentration does not stratify were clarified. Furthermore, the NEA injection conditions were organized by the Overall Richardson number.
