accidental fire in hotels, restaurants, and fast food outlets start in kitchens, and the majority of these involve cooking oil
 Deploying an effective fire suppression system is an important aspect of the fire safety design The purpose of this work was to develop a water mist system to effectively extinguish cooking oil fires. The smaller size water mist droplets offer larger surface area for the same amount of water, allowing faster evaporation of the droplets, and more effective heat extraction from a fire. The mist vapor dilutes the concentration of oxygen as well as of the pyrolysis fuel vapor, thus slowing or arresting combustion. Water mist can also block the thermal radiation and pre-wet other combustibles in the neighborhood to reduce their temperature and delay the ignition.
 In order to achieve this purpose, the mechanisms of water mist in extinguishing cooking oil fires were investigated, and the impact of pool fire characteristics on the effectiveness of water mist in suppressing cooking oil.