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Title: INFLUENCE OF WATER TEMPERATURE ON DROPLET SIZE DISTRIBUTION OF HIGH-PRESSURE WATER MIST NOZZLES
INFLUENCE OF WATER TEMPERATURE ON DROPLET SIZE DISTRIBUTION OF HIGH-PRESSURE WATER MIST NOZZLES

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Marek Miskay; Miriam Kadlubcova; Karla Barcova
10.5593/sgem2024v/3.2/s11.08
10.5593/sgem2024v/3.2
1314-2704
978-619-7603-76-7
English
24
3.2
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE 
•    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
Hydrology, Water Resources, and Climate Resilience
Temperature affects the number of water properties. Density, specific heat capacity, surface tension and more change with temperature. The size of the water droplets has strong impact on the shielding of radiant heat or the ability to extinguish and suppress fires. Determining the droplet size distribution of water mist is used in wide range of industries, in fire protections, spray technology, pharmaceuticals or automotive industry. The work deals with the measurement of the droplet size distribution of eight selected nozzles at different temperatures using the laser diffraction method. The selected nozzles are designed for use in fire protection to extinguish and suppress fires. Measurements were taken at the distance of 12.5 cm from the nozzle in the centre of the mist stream. The water source temperatures chosen for the measurements were 25, 40, 55 and 80 degrees Celsius. The purpose of the work was to determine the effect of temperature on the change in Sauter mean diameter and particle size distribution at a working pressure of 70 bar. For the six measured nozzles, a decrease in Sauter mean diameter with increasing temperature was observed. For the two measured nozzles the result was the opposite. The particle size distribution of the four measured nozzles varied significantly at different temperatures.
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Work on the experiments was possible thanks to the project no. SP2024/020, entitled: „Applicability of water mist on fire classes from CSN EN 2“, which was approved and implemented under the Specific research of the Ministry of Education of the Czech Republic.
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https://doi.org/10.5593/sgem2024v/3.2/s11.08
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Proceedings of 24th International Multidisciplinary Scientific GeoConference SGEM 2024
24th International Multidisciplinary Scientific GeoConference SGEM 2024, 27 - 30 November, 2024
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Russian Acad Arts; Turkish Acad Sci.
57-66
27 - 30 November, 2024
website
10054
High-pressure water mist, Water temperature, Sauter mean diameter, Droplet size distribution, Laser diffraction

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