RESEARCH ON ATOMIZATION CHARACTERISTICS OF HIGH-PRESSURE WATER MIST ATOMIZER FOR FIRE SUPPRESSION

Abstract The objective of the project is to develop water mist extinguishments design by scaling. The report describes the requirement and criteria of scaling fire, scale model, and the results of suppression for a developing water mist system design. The Maritime Safety Committee Draft Circular, MSC 914 is used as a basis test to evaluate a water mist design. A series of three full-scale tests related to MSC 914 were performed: fire only, fire with steel trailers, and fire with steel trailers and combustible commodities. A simulation was accordingly studied. Then, a scaled water mist design was tested in the scale model to find the characteristics needed for suppression in terms of pressure, water flow rate, droplet size, and the spray momentum. Based on these characteristics, a candidate nozzle will be selected for the full-scale MSC 914 test. The results so far show that the water mist system can effectively suppress the fire in scaled MSC 914 model. The full-scale MSC 914 is scheduled for September 2001. Therefore, the final answer is still pending until then. Scaling results are confirmed for temperatures, heat flux and flow for the MSC 914 fire without water add in.

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High Pressure Water Mist – The Modern Approach In Fire Fighting

10.5957/smc-2005-d43 ◽

2005 ◽

Author(s):

Stefan Gordin

Keyword(s):

High Pressure ◽

Fire Protection ◽

Water Mist ◽

Fire Fighting ◽

Modern Approach ◽

Protection Efficiency ◽

Sprinkler Systems ◽

Pressure Water ◽

In Fire

In only ten years, high pressure water mist fire protection has evolved from theory to becoming widely accepted as an alternative to traditional sprinkler systems, foam, CO2, halon, and other gases. It has proven itself as offering equal fire protection efficiency to these other systems and, in many conditions, exceeding them.

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Modeling and Simulation of High Pressure Water Mist Systems

Fire Technology ◽

10.1007/s10694-013-0335-8 ◽

2013 ◽

Vol 50 (3) ◽

pp. 483-504 ◽

Cited By ~ 15

Author(s):

Topi Sikanen ◽

Jukka Vaari ◽

Simo Hostikka ◽

Antti Paajanen

Keyword(s):

High Pressure ◽

Modeling And Simulation ◽

Water Mist ◽

Pressure Water

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New techniques and a new approach to the effective extinguishing of fully developed fires in enclosed spaces

Internal Security ◽

10.5604/20805268.1231596 ◽

2016 ◽

Vol 8 (1) ◽

pp. 213-224

Author(s):

Norbert Tuśnio ◽

Paweł Wolny

Keyword(s):

Fire Suppression ◽

Radiant Heat ◽

Fire Service ◽

Water Mist ◽

Abrasive Waterjet ◽

Water Spray ◽

Fire Extinguishing ◽

Pressure Water ◽

Fire Area ◽

In Fire

An example of modern water mist extinguishing technology is presented in the article. Water mist systems are firefighting systems which uses very fine water sprays. The smallest water droplets allow a water mist to control, suppress or extinguish fires by cooling both the flame and hot gases by evaporation, displacing oxygen by evaporation and reducing radiant heat through the small droplets themselves. The effectiveness of water mist systems in fire suppression depends on its spray characteristics, which include the droplet size and distribution, flux density and spray dynamics, phase of fire development, fire size and the ventilation conditions. The COBRA (known as PyroLance in USA) systems presented use of a cutting extinguisher is a fire extinguishing technique that combines abrasive waterjet cutting with water spray extinguishing, through a single handpiece or nozzle. The firefighter approaches the fire from outside the main fire area, then uses the cutting action to drill a small hole through a barrier such as a door, wall, roof or floor. Switching to a water spray then allows the fire to be fought, as with a conventional fog nozzle. An analysis of the benefits of using high-pressure water mist in conjunction with new firefighting tactics is described. State Fire Service should aim to minimize water consumption and thus reduce the post-fire losses, take care of environmental protection and improve safety conditions for firefighters.

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