- Author
- Liu, Z. | Kim, A. K. | Su, J. Z. | Carpenter, D.
- Title
- Local Application Water Mist Systems for Fire Suppression.
- Coporate
- National Research Council of Canada, Ottawa, Ontario
- Report
- NRCC-48311
- Book or Conf
- Advance in Fire Suppression Technologies. Proceedings. October 18-19, 2005, San Diego, CA, 1-11 p., 2005
- Keywords
- water mist | fire suppression | fire protection | electronic equipment | kitchens | nozzles | fire wxtinguishers | oils | extinguishment
- Identifiers
- local/zone application mist systems for electronic equipment room protection; local application mist systems for commercial kitchen area protection; portable water mist fire extinguisher; local application (LA) mist systems for industrial oil cooker protection
- Abstract
- The development of water mist fire suppression technology has made substantial progress over the last decade. It has been used to replace techniques no longer deemed environmentally acceptable, such as halons, or to provide answers to problems where traditional technologies have not been effective. Water mist systems, according to their applications, have been distinguished into three types: total compartment application (TCA), local application (LA) and zoned application (ZA) systems. For a TCA system, water is discharged from all nozzles distributed throughout the compartment. A large and enclosed fire can be extinguished by a TCA system as the oxygen concentration in the compartment is quickly dropped due to the consumption by the fire and the displacement by water vapour. However, it is difficult for a TCA system to extinguish small or hidden fires, and water damage may result, as a large quantity of water is discharged. An LA water mist system, like a zoned application system, extinguishes a fire mainly by cooling flames or by cooling the fuel surface. It is arranged to discharge directly to an object or hazard in an enclosed, partially enclosed, or open outdoor area. It extinguishes small and hidden fires more effectively than a TCA system. LA water mist systems have been used to provide the protection for engine test cells, bulk conveyors, flammable liquid storage racks, commercial cooking areas and industrial oil cookers.