A ZONE MODEL FOR ULTRAFINE WATER MIST FIRE EXTINCTION IN COMPARTMENTS

A zone model suitable for a preliminary fast assessment of the required release of Ultra Fine Water Mist (UFWM) for fire extinguishment in compartments is presented. Developed starting from the two zone model, it includes separately the fire plume zone to account for the peculiar behavior of UFWM that vaporize before reaching the burning surface. Evaluation of the effectiveness is based on aposteriori observation of results. An example of application to an office workstation compartment is reported.