Study On Fire Protection Effect Of S-Type Hot Aerosol Extinguish Equipment In Different Aperture Ratio And Ventilate

S-type hot aerosol extinguishing technology as the halon substitutes, due to its superior property become one of the most concerns fire extinguish system. The condition of the space which is fitted for hot aerosol extinguish equipment direct influence hot aerosol extinguish affection. At present, the suitable condition of hot aerosol extinguish equipment research in domestics and overseas are not well known and the relevant specification of this lack of theoretical support. The paper study the hot aerosol extinguish equipment’s spray deposition uniformity, by means of numerical simulation. The main research achievements were as follows:(1) The combustion process of S-type hot aerosol fire extinguishing agent is stable combustion, The varying tendencies of mass loss ratebecomes direct ratio with time, so the heat release rate stay the same in the hole combustion process, according to the selected recipe extinguishant, the fire source heat release rate is 56.6kJ/s though calculate.(2) The protected area affects the hot aerosol Sextinguishant distribution and concentration in opening site, aperture ratio and air speed, air speed affects the most, aperture opening ratio take the second place, opening site affects the least.(3) Under the other conditions remaining the same, opening size more bigger more against hot aerosol extinguish equipment put out a fire. We can work out that the hot aerosolextinguishant not only fewer but also get bad distribution uniformity when aperture ratio more bigger. When the aperture radio greater than 0.3％, hot aerosol extinguishant layering in space, means that upper space has higher extinguishant concentration while bottom has lower extinguishant concentration, and this result in the poor fire protection effect.(4) Under the other conditions remaining the same, wind speed more bigger more against hot aerosol extinguish equipment put out a fire. We can work out that the hot aerosolextinguishant not only fewer but also get bad distribution uniformity when wind speed more bigger. When the wind speed reaches a certain value, hot aerosol extinguishant decreased dramaticaly, makes the distribution of hot aerosolextinguishant increasingly uneven.