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Droplet sizing and characterization of water mist fire protection spray nozzles
As manufacturer of spray nozzles the author is strongly involved into the design of high-pressure extinguishing systems. A central part of these systems are the nozzles which produce the fine sprays to extinguish a fire. The characteristics and behaviour of these sprays are investigated by us to guarantee a correct work of the extinguishing processes and effects which are typical for these extinguishing systems such as cooling effect, inerting effect, separation and shielding effect, gas scrubbing etc.. There exist different fire-extinguishing systems. One system that is more and more of interest today is the High-Pressure Water Mist extinguishing system that is installed in many lines of business and industry, on ships and in tunnel-constructions. The physical principle of the water mist extinguishing process depends strongly on drop let sizes. Therefore extensive investigations on droplet sizes and other spray characteristics under various conditions were clone with different water mist fire protection spray nozzles. The droplet size measurement were done with a Phase Doppler Anemometer. The results of these measurements show the quality of the nozzles and lead to same additional fire-fighting tests that are clone to prove the efficiency of the fire extinguishing system under realistic conditions. The spray width and even more the drop let size characteristic are of fundamental interest because the droplet size spectra of the sprays are responsible for the efficiency of all extinguishing effects mentioned above. The spray nozzles and also the complete fire extinguishing system have to be tested under realistic conditions for example in closed rooms to be sure that the arrangement of nozzles, pressure level, flow-rate level and other parameters are optimal for any given application.
Droplet sizing and characterization of water mist fire protection spray nozzles
As manufacturer of spray nozzles the author is strongly involved into the design of high-pressure extinguishing systems. A central part of these systems are the nozzles which produce the fine sprays to extinguish a fire. The characteristics and behaviour of these sprays are investigated by us to guarantee a correct work of the extinguishing processes and effects which are typical for these extinguishing systems such as cooling effect, inerting effect, separation and shielding effect, gas scrubbing etc.. There exist different fire-extinguishing systems. One system that is more and more of interest today is the High-Pressure Water Mist extinguishing system that is installed in many lines of business and industry, on ships and in tunnel-constructions. The physical principle of the water mist extinguishing process depends strongly on drop let sizes. Therefore extensive investigations on droplet sizes and other spray characteristics under various conditions were clone with different water mist fire protection spray nozzles. The droplet size measurement were done with a Phase Doppler Anemometer. The results of these measurements show the quality of the nozzles and lead to same additional fire-fighting tests that are clone to prove the efficiency of the fire extinguishing system under realistic conditions. The spray width and even more the drop let size characteristic are of fundamental interest because the droplet size spectra of the sprays are responsible for the efficiency of all extinguishing effects mentioned above. The spray nozzles and also the complete fire extinguishing system have to be tested under realistic conditions for example in closed rooms to be sure that the arrangement of nozzles, pressure level, flow-rate level and other parameters are optimal for any given application.
Droplet sizing and characterization of water mist fire protection spray nozzles
Größenbestimmung von Tröpfchen und Charakterisierung von Wassernebeldüsen zum Brandschutz
Schürmann, S. (author)
2002
6 Seiten, 9 Bilder, 4 Quellen
Conference paper
English
Zerstäuben , Feuerlöscheinrichtung , Tröpfchen , Wasserverbrauch , Düsenströmung , Kühlung , Nebel , Wirksamkeit , Adhäsion , Rauch , Ruß , Wärmeentwicklung
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