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Remote extinguishing of large fires with powder aerosols
Author(s) -
Krasnyansky Mikhail
Publication year - 2006
Publication title -
fire and materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.482
H-Index - 58
eISSN - 1099-1018
pISSN - 0308-0501
DOI - 10.1002/fam.918
Subject(s) - aerosol , fumed silica , volume (thermodynamics) , environmental science , residence time (fluid dynamics) , extinguishment , ammonium phosphate , materials science , particle (ecology) , environmental engineering , waste management , chemistry , composite material , geotechnical engineering , engineering , geology , fertilizer , physics , oceanography , organic chemistry , quantum mechanics , political science , law
A new method for distant extinguishing of fire spreading in an extended closed volume such as a mine working, storehouse, subway tunnel, electric cable channels, etc. is proposed. A novel extinguishing agent based on a stable mixture of superfine ammonium phosphate [NH 4 H 2 PO 4 ] and modified fumed silica [SiO 2 –CH 3 ] is supplied to the fire by a powerful ventilator. The properties of the extinguishing agent (average particle size, airborne residence time, distance of transfer by the air stream) have been studied in an experimental chamber (100 m 3 ). A test extinguishing of a large‐scale fire has been performed in an experimental tunnel 180 m in length. Extinguishing agent consumption, dynamics of temperature change over the tunnel length and composition of fire gases were recorded in this test. The influence of foam concentration, addition of nitrogen and halons to aerosol, were also studied. Copyright © 2006 John Wiley & Sons, Ltd.