Killer smoke defeted for the first time in history. The Latest Development of Blueproof April/2014
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Transcript of Killer smoke defeted for the first time in history. The Latest Development of Blueproof April/2014
BLUERAD LTD
Facts
[1] Information Bulletin of the World Fire Statistics Centre. Geneva Association. www.genevaassociation.org[2] Fire statistics Great Britain, 2011 to 2012 December 2012 Department for Communities and Local Government[3] CDC injury Fact Book 2001-2002. Residential Fires. United States Center for Disease Control 2003.[4] www.bisque.co.uk largest selling range classic radiator holds 12 liters
[5] Ref: Essentials of Fire Fighting and Fire Department Operations 5th Edition correlated to the 2008 edition of NFPA 1001.[6] Ref The Case For Space Royal Institute for British Architects 2011[7] Ref. The Building Regulations http://www.planningportal.gov.uk/buildingregulations
Initial Goal: To develop a device that can be attached to a radiator or heating panel and activate in the event of fire1.Can a plastic device be used to release the fluid in the radiator? (Yes, Proven)2.Will it activate on confirmed fire?
– Sprinkler activation is by heat exposure. It expands, fails open, releases water in all directions.
– A thin plastic wall would behave the same, but it would self-target. A bursting disk!! (Yes, Proven)
•Will it meet the temperature and pressure requirements of a household radiator under normal operating conditions? (13 bar and 75 oC)? [8] (Yes, Proven)
[8] Chartered Institute of Building Service Engineers (CIBSE)
1. Can a high tech plastic device be used to release the fluid in the radiator?(Yes, Proven)
Can plastics behave like a sprinkler? They are better! plastic goes through phase changes:
1. 1st The heat deflection temperature phase. 2. 2nd The Vicat temperature phase, where the exposed
surface starts to soften on exposure to heat. The internal pressure forces the surface area towards the heat source. It basically self targets.
3. 3rd Surface Failure along the lines of least resistance. These lines can take the form of a Maltese Cross pattern.
Spherulites embedded into a mosaic mesogen in the Maltese Cross pattern
[9] American Society of Mechanical Engineers (ASME)
A fire tested sample proving the Concept.
Thinned WallSection
Will it activate on confirmed fire? (Yes, Proven)Consider Full Scale House Test Temperature profilesParameters•Accelerant•2 Floors•Doors Closed•ThermocouplesPositions shownAccurate to plusOr minus 7 oC
Source for the graph: US Department of Commerce National Institute of Standards and Technology Gaithersburg, MD 20899. Full – Scale House Fire Experiment for InterFIRE VR May 6, 1998
At Height of Vent plug on Radiator
Heat Deflection Temp 103 oC
Melt Temp 230 oC
Vicat Temp 160 oC
Based on these figures the activation time is estimated to be between 80 and 100s
(Activation time observed during testing was between 43.5 and 90s)
Integrity during fireWhat happens during the fire and will the head melt?
• The air trapped at the top is driven by the pressure through the surface during the Vicat (softening) phase.
• As the following fluid passes through the device it cools and maintains the integrity. • During full scale fire experiments the above held true. It retained its integrity as
shown below. (Yes, PROVEN)
All Fire experiments by direct flame impingement
Typical spray patterns during activationWith flame impingement on one side of face
What happens to the flowing fluid during a fire?• The fluid changes phase and obeys the gas laws.• On release, it expands rapidly and fills the available space, assuming the
door is closed.• It absorbs the heat from its surroundings. The volume of water vapour is
1,700 times greater than liquid water, at 540°C this expansion is over 4,000 times. [10]
• It displaces the oxygen and deprives the flame front of its fuel source. Asphyxia Strangles the flame. It creates a barrier against the inflowing air oxygen mixture stopping the depletion above survivable limits. (Yes, Proven)
• So the pattern is not important but getting the fluid into the room is! • This has now been confirmed at GI by the National Institute of Standards
and Technology (NIST) and Underwriters Laboratories (UL) [11] The whole structure is cooled throughout. (Yes, Proven)
[10] Ref. Essentials of Fire Fighting and Fire Department Operations 5th Edition correlated to the 2008 edition of NFPA 100
[11] Source: Fire Behaviour and Tactical Considerations Aug 23rd 2013 IAFTV NIST UL
How long before the fire is suppressed?
• The graph shows that the rate of decay occurs almost as fast as the rate of rise.
• So basically the room should be cooling within 20 to 50 seconds from activation as the fluid is released.
• Test chamber cooled in seconds.
• (Yes, PROVEN)
Source for the graph: Fire Mutual Research Council Serial No. 21011.4 RC75-T-31 June 1975
Blueproof device activated: fluid
released
Source Fire Behaviour and Tactical Considerations Aug 23rd 2013 IAFTV NIST UL
982-> 426 oC
482-> 260 oC
71-> 71 oC
315-> 176 oC
143-> 98 oC
371-> 148 oC
648-> 149 oC
Water characteristics
• Under static conditions the available fluid in the domestic system is at raised/room temperature, so we have a faster rate of vaporisation.
• Under operating conditions the available fluid in the domestic system is at raised temperature, so we have an even faster rate of vaporisation with a Central Heating system.
• Under emergency service operations the available fluid is at low mains temperature and less effective (slower to vaporise) during suppression of the fire.
• Why is the vapour production so important?– The formation of a (vapour) sky prevents roll over, back draught or Flash Over
as it is commonly called. – The smoke falls out as the vapour interacts with it making it easier to breath.– The survival time increases as the temperatures plummet.(Yes, Proven)
Source: Fire Behaviour and Tactical Considerations Aug 23rd 2013 IAFTV NIST UL
815-> 37 oC
815-> 21 oC
843-> 121 oC
454-> 204 oC
649-> 204 oC
71-> 71 oC
Normal operating conditions
[12] Seetru hydrotest results September 2013.
GOVERNORS ISLAND, N.Y. — July 3, 2012, Governors Island, NYC — Underwriters Laboratory’s (UL) has partnered with the National Institute of Standards and Technology (NIST), the New York City Fire Department, and the Governors Island Preservation and Education Corporation to utilize rigorous scientific methods to advance firefighter safety. The collaborative research team worked together for months to design the experiments that were conducted over six days in July on Governors Island in New York City and consisted of a series of live burn experiments that replicated conditions in modern homes [13]
[13]. www.ul.com/global/eng/pages/corporate/aboutul/noteworthy/ulliveburnevent/presscenter/
Full Scale Experiments
Note the distinctLack of cluttercurtainsrugs, picturesbooks etc. Thatwould add to the fire effect duringexperiments.
Source Fire Behaviour and Tactical Considerations Aug 23rd 2013 IAFTV NIST UL
Accelerant added Fire started Fire doused by 5 distinct streams createdDuring experiment
Constant temperature and gas analysis throughout experiments
Crib to ISO
Blueproof head location
• The objective was to study where the fire fighter discharged the water and the effects it had on the structure.[11] What impact did have on the street fire fighter and tactics.
Not on the effects on the occupants. Based from initial assumptions that:
• ‘hot gases flowed from the area of high pressure to the area of low pressure, basically cool air in low hot gases out high. In a ventilated fire’.[11]
• ‘temperatures increased dramatically when a flow path was established’. [11]
• ‘when a door was closed. The temperatures fell’ [11]
176.6 -> 510 oC
426 -> 982 oC
49-> 71 oC
426 -> 982 oC
426 -> 871 oC
76 -> 143 oC
Source Fire Behaviour and Tactical Considerations Aug 23rd 2013 IAFTV NIST UL
Note: the temperature rises
Source Fire Behaviour and Tactical Considerations Aug 23rd 2013 IAFTV NIST UL
43-> 43 oC
107-> 88 oC
426-> 149 oC
926-> 149 oC
315-> 93 oC
121-> 93 oC
648-> 204 oC
Note: the temperature falls dramatically
Source Fire Behaviour and Tactical Considerations Aug 23rd 2013 IAFTV NIST UL
204-> 93 oC 37-> 48 oC
482-> 121 oC
204-> 65 oC
482 -> 65 oC
537-> 93 oC
The door was removed, with a hose trained on it, Flashover did not happen. The technicians involved have been fire testing for over twenty years and knew exactly what was physically required to invoke flashover. One upholstered chair has the potential to cause Flashover at around 2 mega watts.
• Impact of not putting water on the smoke means that you are crawling under where the fire is and where it wants to go.[11]
(Basically when the firefighter enters the area if the smoke gathered at the ceiling has not been cooled by water it maintains its threat and by entering the area a path is established where the fire wants to travel and this called flashover)
• Immediate fire attack has a major influence.[11]
• You may never see fire! ‘What you do see and commonly think is a fire is represented by the flame front. The yellow flame is the visible portion of the fire. Where the gases interface with the air. You may see it at the doorway or window. It could follow you from behind as you make way to the oxygen supply during your escape. The fire wants the oxygen as much as you do.[11]
• The hot gases at the ceiling are in excess of a thousand oF (around 800 oC)[11]
• Introducing a short burst of water into a basement fire lowers the temperature at the top of the stairs.[11]
• The GI experiments demonstrated that applying water directly into the fire compartment, as soon as possible, resulted in the most effective means of suppressing the fire[11]
• This is not new and has been called by many names [11]
– Blitz attack– Resetting the fire– Early water– Transitional attack
What Blueproof did was provide the method to achieve thisby already being available in the fire compartment
Impact on Building Occupants• Additional ventilation reduces potential survival time.[11]
• Fire suppression from the exterior, as soon as possible, increases potential survival time. [11]
• Fire suppression from the interior at onset with Blueproof massively increases the potential survival time!
• The GI research provides:• Improved understanding of fire behaviour in structures [11]
• Additional tactical options for improving the survivability of both occupants and firefighters [11]
Fitted in 5 minutes
8 months with Central Heating activated: NO LEAK / NO FAILURE
When will it be safe to enter the room?• It will not be!!!• The room may be wet and the fire could have been started by an electrical fault
that could make the floor live leading to electrocution.• We don’t enter the room until the emergency response teams have isolated the
power and identified the cause.• We leave it to the professionals.• In isolated properties, such as homesteads in South Africa, we will produce room
entry procedures for the home owner. These will be made available on the packaging and Website.
• So we have an item that can be moulded from a relatively inexpensive high tech material that we can fit in everyone's home. And very soon it could whistle loud enough to wake the street. Fires are silent but very soon they will not be.
• Now we optimise design, verification, further testing, certify, manufacture and get it to the people of the world.
• Let’s save lives stop children getting burnt alive and eliminate the threat from people pouring accelerants through doors. We can stop it happening.
• Give them a chance to get out alive!
Thanks