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Automatic Fire Extinguishing Systems

Life Safety
Erol Erbiçer
11 July 2017
Automatic Fire Extinguishing Systems

The automatic fire extinguishing systems are integrated systems designed to operate independently of humans, based on the principle of evacuating the extinguishing fluid triggered within a certain space and after automatic detection of the fire to the protected area for the purpose of extinguishing the fire.

The main purpose is to save the site or the equipment in the site from the fire with minimum damage or without any damage.

There are also automatic extinguishing systems that allow manual human intervention within the pre-alarm time after detection or without waiting for detection. These types of extinguishing systems are usually automatic gaseous extinguishing systems.

Extinguishing systems are mostly used in buildings within the scope of property protection, in order to protect the spaces or equipment from fire. The value to be protected may be property with financial value, financial value depending on the continuity of the enterprise, or information and resources with their financial provision not directly calculated.

Depending on the intended use of the space or the characteristics of the equipment to be protected, solutions can be created with different types of extinguishing material (gas, water, fluid, etc.). Water extinguishing systems can operate on their own, as well as raid-type systems using water can be initiated with an external trigger. Gas extinguishing systems can be installed locally as well as integrated with central fire detection and alarm systems.

Operating Principles of Automatic Fire Extinguishing Systems

The system generally consists of a material stored in the extinguisher fluid state and in a certain space, a trigger control system and a piping system for releasing it into the environment if necessary.

 Fire basically consists of three elements (combustible material, heat and oxygen) and these three must be present at the same time in order for a fire to occur. In summary, the extinguishing systems eliminate the fire hazard by using one of the following methods:

  • Eliminating the contact of combustible material with heat and oxygen
  • Heat reduction
  • Reducing the oxygen ratio in the ambient
  • Breaking the chain reaction of the fire by chemical blocking

The combustion does not occur when the oxygen level in the ambient is reduced below 16%. Some gases, on the other hand, reduce the heat in the ambient and prevent the formation of the fire chain and extinguish the fire. In raid-type extinguishing systems, both cooling and combustible material are isolated from oxygen and the fire is extinguished.

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