FEATURES OF NEW GENERATION FIRE SAFETY

FOR METRO TUNNELS

NEW IMPULSE TECHNOLOGIESFIREFIGHTING IMPULSE STORM TECHNOLOGIES AND SYSTEMS

www.impulse-storm.com

APRIL/2016

Problem

Cause

Solution

Summary

AGENDA

PROBLEM

Fires in underground transportation structures and tunnels are characterized by quick spreading of dangerous substances, fast temperature raising, blocking of escape routes, contamination of adjacent surface areas and buildings with toxic products result of the fire, damage of tunnels’ structures, and interruption of important traffic artery. Fire development in subway train cars, on passenger platforms, escalators, tunnels and subway objects, which are critically important for safety, has essential peculiarities, such as:- semi-confined areas with significant concentration of people, associated with the

complexities of passenger evacuation;- high possibility of burning of materials that discharge toxic components when burning;presence of a power cables with voltage of up to 10 kW; - presence of a considerable number of electric installations under voltage, including the train cars; - high air exchange speed causing fast increase of temperature to the values of over one thousand degrees.

PROBLEM

The specific characteristics of the fires on underground objects and in tunnels, demand strict and specific requirements to fire extinguishing systems, in particular:

- fire extinguishing substances used in rail wagons, on passenger platforms and escalators must be safe for people;

- the system should secure quick performance, including cases in which maneuvering is restricted in the tunnel;

- the fire extinguishing system should secure safety for the people present in rail wagons, on platforms and escalators,

- the fire liquidation task should not lead to flooding of subway tunnels, cable trays, and engineer premises.

Problem

Cause

Solution

Summary

AGENDA

CAUSE

Subway train conductors are usually the first persons who detect a fire that emerged in the result of a short circuit in a cable or in a contact rail. One may think that the initial, simplest and easiest action should be having the conductor stop the train, take a fire extinguisher, and extinguish the burning cable before the neighboring cables insulation catches on fire and the fire evolves to an uncontrolled stage. However, in reality, this is impossible to do, due to several reasons:- one cannot approach the area of a short circuit in less than two meters, in order to avoid electric shock.- it is prohibited to use standards water or water-and-foam fire extinguishers.- due to the distance from the ignition center, the use a carbon dioxide or other gas fire extinguishers is inefficient. Some energized cables can be disposed at heights reaching up to 5 meters from the floor level. These three points are also applicable for cases when a fire happens under train cars and in a contact rail. The existing fire extinguishers occupy reasonable areas in the conductor’s cabin and often cannot be applied because of their heavy weight.

CAUSE

Standard firefighting water mist system in the railroad tunnels are dangerous, inefficient and also expensive. Photo show the result of "work" water mist system in Eurotunnel on Saturday 17 January 2015. Cost this water mist system 22 000 000 euro.

Problem

Cause

Solution

Summary

AGENDA

SOLUTION

Impulse Storm-S Pulverization System. The pulverization component is a deeply upgraded system of mixing and injecting liquid rocket fuel

components into the combustion chamber of a space rocket. As everyone knows the jet stream in a rocket engine is created by three components during

combustion: fuel, oxidizing agent, catalyst. These components are special parts of a space rocket. They are premixed in a uniform structure and set on fire afterwards.

The Impulse Storm-S Technology mixes water, neutral gas and foam concentrate in the fuel injector in a similar way and emits as a cold stream to fire.

In other words, our team of scientists has created a symbiosis of rocket engines that instead of hot jet emits a stream of cold pulverized special mixture water\foam\neutral gas.

SOLUTION

The main differences:- The droplet size less than 100 microns.- Ultrafine-water flow.- The special composition of which can not create any electrical hazard.The result is 100% electrical safety. Video test for electrical safety on the next page.

SOLUTION

System Impulse Storm-S is produced as hand-held fire extinguishers stationary and mobile systems. Video action systems in metro tunnel on the next page.

Problem

Cause

Solution

Summary

AGENDA

SUMMARY

All systems Impulse Storm-S certified in the countries exUSSSR and more than 12 years are used in metro cities of Moscow, Kharkov, Dnepropetrovsk, Samara, Moscow, Minsk, Novosibirsk, St. Petersburg.Independent production created in the United Arab Emirates, Germany, Switzerland and Hungary.

WWW.IMPULSE-STORM.COM