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NEW CLASS OF ATOMIZED WATER SPRAYERS FOR LIVE EQUIPMENT FIRE SUPPRESSION

Journal: Pozharovzryvobezopastnost/Fire and Explosion Safety (Vol.25, No. 2)

Publication Date:

Authors : ;

Page : 59-68

Keywords : ;

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Abstract

Atomized water sprayer advantages and fields of their application have been shown. Fine dispersion droplet flow characteristics most vital for firefighting such as averaged flow droplet diameter, spray intensity and flow rate, were determined. A new class of atomized water sprayers that mainly employ cavitation effects in channels and liquid vortices has been illustrated. Sprayer prototypes fully complying with atomized water flow dispersion characteristics were designed and tested (D10 < 150 |im at pressure more than 0,4 MPa). AFFF-type foam agent additive to water wouldn't distort their hydraulic, electrical, and dispersion features. Firing tests on model fire site of liquid and solid combustibles demonstrated high fire extinguishing efficiency with a new class of sprayers applied, thus achieving model fire site extinction that wouldn't be suppressed by standard conventional sprayers. Electrical safety margins have been determined by live equipment spray intensity J< 0,4...0,71/(m2 •s) with a new sprayer class used at 0,4.1,0 MPa delivery pressure.

Last modified: 2018-10-18 17:07:48