Mist Fire Suppression System
constructed from GRP
An Effective Solution for Fire
The small drops allow the water mist to control, stifle and suppress fires by:
- The cooling of both the flame and the gases generated in the combustion
- Evaporation of oxygen displacement
- Radiant heat attenuation with the same small drops
The effectiveness of a water mist system in fire suppression depends on the characteristics of the fog generated, including the distribution of small water droplets, discharge density and fogging dynamics, concerning unique fires characteristics including; fuel shielding, fire size and ventilation conditions.
The systems operate with pressures of use between 35 and 210 bars, discharging drops of very small diameter and high speed.
Mist fire suppression systems employ high-pressure natural water as an extinguishing agent and are based on well-established hydraulic principles and technology. The specially designed automatic or open sprinklers cause the water to discharge in the form of a fine fog. The small drops of water offer a large total area of heat absorption, thus allowing effective cooling of the fire zone and its surroundings. The high velocity of the drops means that the fog can penetrate the hot gas and reach the combustion surface, even in large fires protecting from the direct action of the discharge.
- Cooling of fuel and space.
- Displacement of oxygen at the base of the fire.
- Attenuation of heat transmission by radiation.
- Washing and decanting of toxic fumes and gases.
Advantages of Misting Systems for Fire Suppression
The cooling effect is optimised to the maximum, by the division of the water applied in extremely small drops (60-200 mm). It results in a gigantic increase in heat absorption. A high percentage of these small drops enter the gaseous state, removing the heat necessary for evaporation from the fuel and displacing oxygen from the base of the fire. (Water increases about one thousand seven hundred times in volume when it evaporates). This vaporisation process cools and quenches the combustion reaction, reducing the emission of flammable vapours, and ultimately causing extinction.
It is important to highlight the fact that the suffocation effect is limited to the environment of the fire, which is where the water mist turns into steam. The enclosure remains with generic oxygen levels, higher than 17-19%, which causes the atmosphere to remain above hypoxic levels.
Mist fire suppression control system for dispersed water:
The automatic fire extinguishing system with water mist is one of the most effective and available methods today. Its effectiveness determines two parameters:
- Minor damage caused
- Minimum cost of consumables
This water supply method offers significant advantages in the extinguishing process including, high performance and acceleration of eliminating a fire, small drops enter a vapour state faster, displacing oxygen and actively reducing the temperature. Economic consumption of extinguishing agents, about 1.5 liters per 1 m2 of surface. Misting systems significantly reduce the penetration of smoke through the room, binding solid particles. These systems locate & eliminate the fire so fast that it minimizes water consumption and damage.
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