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| Clean agent FS 49 C2 ： ウィキペディア英語版 |
Clean agent FS 49 C2
Clean agent FS 49 C2 is an environmentally engineered, human safe, fast extinguishing Clean Agent fire extinguishing gas for gaseous fire suppression installed in a suited fire suppression system.
The Clean agent FS 49 C2 is an extinguishing gas mixture that suppresses fire while maintaining breathable concentrations of oxygen in the air. This makes it possible to extinguish a fire with less danger to people in the room at extinguishing concentrations in contrast to pure Carbon Dioxide (CO2) based fire suppression system which is deadly to humans when released. In the beginning the gas was called Halotron II B/FS49C2 but later only the name FS 49 C2 is used. It is a gaseous solution of 60-80% tetrafluoroethane (R-134a), 10-30% pentafluoroethane (R-410A) and 10-30% carbon dioxide (CO2). Former fire chief Einar. Gjessing made an article about the product to inform firemen how this gas works in case they need to enter a fire site with FS 49 C2.
== Thermal fire suppression ==
FS 49 C2 acts similar to as an inert gas. The heat produced from the combustion process is absorbed by the extinguishant. This mechanism is consistent with the observation that there is no decrease in the fire heat release rate as long as the amount of extinguishment agent added is below a certain limit, and as soon as more extinguishment agent is added the fire is then extinguished.
The difference from inert gases and FS 49 C2 is that it takes less gas to suppress a fire, and therefore less space is consumed by storage of gas to a fire extinguishing system. How much space saved will depend on the pressure used when filling the cylinder. It may vary between a 50-90% saving of storage space.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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