Automatic gas fire suppression systems are recommended for the protection of certain spaces where water cannot be used (such as computer server rooms).
The automatic gas fire suppression system is a fixed device that detects the outbreak of a fire and extinguishes it by releasing inert or inhibitory gas extinguishing agents. There are two types of gas extinguishing agents:
CO2, although widely used in the past, is lethal to humans at extinguishing concentrations and is now reserved for specific applications such as spot protection or protection of areas without personnel presence.
The three components of the fire triangle are: the oxidizer, the fuel, and the energy (heat, flame, ...). To stop or reduce combustion, one must act on all three components.
Based on this, the principle of automatic extinguishing aims to reduce the oxygen content (oxidizer) in the air by injecting inert gases. Inhibitory gases are extinguishing agents that combine both effects: they decompose in the fire, causing a local reduction in oxygen concentration and heat absorption, leading to a decrease in temperature.
The choice of extinguishing agent begins with a risk analysis taking into account several parameters such as:
The selected extinguishing agent is the one that offers the best compromise.
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