Hybrid Fire Protection
NanoMist Hybrid System Summary
NanoMist Hybrid System Fire Test
Synergistic Effect of Water and Nitrogen Components in NHS Hybrid
A paradigm shift is evolving by NanoMist® Hybrid System (NHS) with an enhanced performance due to “synergistic” effects of gas-like ultrafine water mist and an inert gas blend. Neither water alone nor inert gas could provide the hybrid blend performance at similar mass flow rates, used independently. The below 10-micron uniform droplet size of NanoMist® ultrafine water droplets interact with fire generating a favorable flow dynamic for local depletion of oxygen at the fire base. The analytical theory is being developed. Upon introduction of hybrid blend with a small proportion 8-12% (wt.) of water significantly reduced the extinction times even at low release pressures such as 200-300 psi. At 12% water and 300 psi, the extinction time was about 100 s in a 28 m3 room.
A comprehensive data of extinction times for randomly varied water mass fraction and nitrogen release pressures is shown for 28 m3 room with NHS hybrid.