Presentation is loading. Please wait.

Presentation is loading. Please wait.

Assessment Of Fire Suppression Capabilities Of Water Mist -Fighting Compartment Fires with the Cutting Extinguisher- FIREFIGHT II Mid-term Meeting Wednesday.

Similar presentations


Presentation on theme: "Assessment Of Fire Suppression Capabilities Of Water Mist -Fighting Compartment Fires with the Cutting Extinguisher- FIREFIGHT II Mid-term Meeting Wednesday."— Presentation transcript:

1 Assessment Of Fire Suppression Capabilities Of Water Mist -Fighting Compartment Fires with the Cutting Extinguisher- FIREFIGHT II Mid-term Meeting Wednesday 24 – Friday 26 November 2010 in Prague -Fighting Compartment Fires with the Cutting Extinguisher- FIREFIGHT II Mid-term Meeting Wednesday 24 – Friday 26 November 2010 in Prague Pg. Dip. Msc. Fire Safety Engineering Academic year 2009/2010 Pg. Dip. Msc. Fire Safety Engineering Academic year 2009/2010 Julien GSELL Julien GSELL

2 ContentsContents IntroductionIntroduction –Msc Fire Safety Engineering –The Master Thesis –Why on the Cutting Extinguisher? IntroductionIntroduction –Msc Fire Safety Engineering –The Master Thesis –Why on the Cutting Extinguisher?

3 ContentsContents IntroductionIntroduction BackgroundBackground –Literature review –A Thesis to answer what? –Going further in the study IntroductionIntroduction BackgroundBackground –Literature review –A Thesis to answer what? –Going further in the study

4 ContentsContents IntroductionIntroduction BackgroundBackground Experimental frameworkExperimental framework –Enclosure & type of fuel –Instrumentation –Methodology IntroductionIntroduction BackgroundBackground Experimental frameworkExperimental framework –Enclosure & type of fuel –Instrumentation –Methodology

5 ContentsContents IntroductionIntroduction BackgroundBackground Experimental frameworkExperimental framework ResultsResults –Water mist behaviour –Fire suppression capabilities –Safety concerns IntroductionIntroduction BackgroundBackground Experimental frameworkExperimental framework ResultsResults –Water mist behaviour –Fire suppression capabilities –Safety concerns

6 ContentsContents IntroductionIntroduction BackgroundBackground Experimental frameworkExperimental framework ResultsResults ConclusionConclusion –Publication –Translation in French –Haut-Rhin Fire Service IntroductionIntroduction BackgroundBackground Experimental frameworkExperimental framework ResultsResults ConclusionConclusion –Publication –Translation in French –Haut-Rhin Fire Service

7 IntroductionIntroduction Msc Fire Safety Engineering –University of Ulster at Jordanstown Belfast, Northern Ireland The Master Thesis –Assessment of the Fire Suppression Capabilities of Water Mist Why on the Cutting Extinguisher? –Previous placement Study of the manufacturing, use, and development of the tool Msc Fire Safety Engineering –University of Ulster at Jordanstown Belfast, Northern Ireland The Master Thesis –Assessment of the Fire Suppression Capabilities of Water Mist Why on the Cutting Extinguisher? –Previous placement Study of the manufacturing, use, and development of the tool

8 BackgroundBackground Literature review –The Cutting Extinguisher - Concept and Development: Swedish Rescue Services Agency, 1999 –Holmstedt, Göran. An assessment of the Cutting Extinguisher's Capabilities and limitations: Lund University, 1999 –Winkler, Thomas Karlsen & Henrik. Skärsläckaren som röjnings och släckverktyg för fartyg av kolfiberkomposit, 2000 –Olsson, Johannes Bjerregaard & Daniel. Skärsläckaren- experimentella försök och beräkningar, 2007 –Cutting Extinguishing concept-practical and operational use: Swedish Rescue Services Agency, Literature review –The Cutting Extinguisher - Concept and Development: Swedish Rescue Services Agency, 1999 –Holmstedt, Göran. An assessment of the Cutting Extinguisher's Capabilities and limitations: Lund University, 1999 –Winkler, Thomas Karlsen & Henrik. Skärsläckaren som röjnings och släckverktyg för fartyg av kolfiberkomposit, 2000 –Olsson, Johannes Bjerregaard & Daniel. Skärsläckaren- experimentella försök och beräkningar, 2007 –Cutting Extinguishing concept-practical and operational use: Swedish Rescue Services Agency, 2010.

9 BackgroundBackground A Thesis to answer what?  How this scenario with a focused jet of water and high flow rate, where the beam is broken up into small droplets, affects the mixing of the fire gases has not so far as known been investigated  the impact of the ventilation openings on the cutting extinguishers ability to extinguish fires  the functioning of the cutting extinguisher in a well controlled fire in relation to various types of and ventilation  the importance for the efficiency of the cutting extinguisher of the water jet being able to break up  Cutting Extinguishing concept-practical and operational use: Swedish Rescue Services Agency, A Thesis to answer what?  How this scenario with a focused jet of water and high flow rate, where the beam is broken up into small droplets, affects the mixing of the fire gases has not so far as known been investigated  the impact of the ventilation openings on the cutting extinguishers ability to extinguish fires  the functioning of the cutting extinguisher in a well controlled fire in relation to various types of and ventilation  the importance for the efficiency of the cutting extinguisher of the water jet being able to break up  Cutting Extinguishing concept-practical and operational use: Swedish Rescue Services Agency, 2010.

10 BackgroundBackground Going further in the study –Calibration of the water mist generated –Water mist volumetric behaviour (situation without fire) –Re-ignition probability –Possible pressure variations in the compartment –Consequences of spraying water mist Regarding the Fire fighters Regarding a potential victim Going further in the study –Calibration of the water mist generated –Water mist volumetric behaviour (situation without fire) –Re-ignition probability –Possible pressure variations in the compartment –Consequences of spraying water mist Regarding the Fire fighters Regarding a potential victim

11 Experimental framework Enclosure & type of fuel –Characteristics & dimensions of the compartment 40 feet sea container Fire area on the bottom 2.71 m 2 openings area to be used –Type, properties & arrangement Enclosure & type of fuel –Characteristics & dimensions of the compartment 40 feet sea container Fire area on the bottom 2.71 m 2 openings area to be used –Type, properties & arrangement

12 Characteristics & dimensions of the compartment

13 Experimental framework Structure & type of fuel –Characteristics & dimensions of the compartment –Type, properties & arrangement Chipboard panels 12.8 or 8.4 m 2 burning surface Ceiling, lateral and bottom walls Structure & type of fuel –Characteristics & dimensions of the compartment –Type, properties & arrangement Chipboard panels 12.8 or 8.4 m 2 burning surface Ceiling, lateral and bottom walls

14 Type, properties & arrangement

15 Instrumentation –Bottle frame Every 0.5 m from 2.0 to 10.0 m 144 bottles for a control surface of 324 cm 2 –Thermocouple meshing –Radiometer –Pressure record –Video record Instrumentation –Bottle frame Every 0.5 m from 2.0 to 10.0 m 144 bottles for a control surface of 324 cm 2 –Thermocouple meshing –Radiometer –Pressure record –Video record Experimental framework

16 Bottle frame

17 Experimental framework Instrumentation –Bottle frame –Thermocouple meshing 99 TC distributed over 8.8 m length, 2.4 m width and 2.4 m height Control volume of m 3 –Radiometer –Pressure record 2 transducers –Video record Instrumentation –Bottle frame –Thermocouple meshing 99 TC distributed over 8.8 m length, 2.4 m width and 2.4 m height Control volume of m 3 –Radiometer –Pressure record 2 transducers –Video record

18 Temperature, pressure & heat flux

19 Instrumentation –Bottle frame –Thermocouple meshing –Radiometer –Pressure record –Video record Instrumentation –Bottle frame –Thermocouple meshing –Radiometer –Pressure record –Video record Experimental framework

20 Video record

21 MethodologyMethodology Scenarios –Location of the Cutting Extinguisher Front wall, mid-length, 1.65 m high –Studied parameter Experimental protocol –Exploit of the “Bottle frame” –Full scale burnings

22 Location of the Cutting Extinguisher

23 MethodologyMethodology Scenarios –Location of the Cutting Extinguisher –Studied parameters Volumetric distribution of water Influence of opening area, fuel surface, and water flow rate Experimental protocol –Exploit of the “Bottle frame” –Full scale burnings

24 Studied parameters Fire experiments Designation of the scenario Area of the openingsBurning SurfaceWater flow ratePossibles fire scenarios Fire scenariosQ = 56 L/minSf = 12.8 m2Ac = m2 1 2 Ao= 2.71 m2 3 Sr = 8.4 m2Ac = m2 4 Ao= 2.71 m2 5 Qr = 28 L/minSf = 12.8 m2Ac = m2 6 Ao= 2.71 m2 7 Sr = 8.4 m2Ac = m2 8 Ao= 2.71 m2 9

25 MethodologyMethodology Scenarios –Location of the Cutting Extinguisher –Studied parameters Experimental protocol –Exploit of the “Bottle frame” –Full scale burnings

26 Exploit of the bottle frame

27 MethodologyMethodology Scenarios –Location of the Cutting Extinguisher –Studied parameters Experimental protocol –Exploit of the “Bottle frame” –Full scale burnings

28 Full scale burnings

29 ResultsResults Water mist behaviour –Total flooding Water content: 44 g/m 3 Volumetric flow rate: 21.2 m 3 /s Velocity: 7.13 m/s –Spray pattern Water mist behaviour –Total flooding Water content: 44 g/m 3 Volumetric flow rate: 21.2 m 3 /s Velocity: 7.13 m/s –Spray pattern

30 Total flooding

31

32 ResultsResults Water mist behaviour –Total flooding –Spray pattern Inner core + outer ring Initial diameter: 4.5 ° Break up point at 5.0 m Widening following an angle of 9.0 ° –Application modes Water mist behaviour –Total flooding –Spray pattern Inner core + outer ring Initial diameter: 4.5 ° Break up point at 5.0 m Widening following an angle of 9.0 ° –Application modes

33 Spray pattern

34 ResultsResults Water mist behaviour –Total flooding –Spray pattern –Application modes Spread droplets into the flames Spread droplets in the smoke layer Inerting by steam generation Cool the burning fuel surface Shield the fuel surfaces not yet involved Water mist behaviour –Total flooding –Spray pattern –Application modes Spread droplets into the flames Spread droplets in the smoke layer Inerting by steam generation Cool the burning fuel surface Shield the fuel surfaces not yet involved

35 ResultsResults Fire suppression capabilities –Flame tackling time Fire extinguished every time Below 15 seconds regardless to the scenarios Major effect trough blowing and heat extraction –Influence of parameters during gas cooling phase –Re-ignition probability Fire suppression capabilities –Flame tackling time Fire extinguished every time Below 15 seconds regardless to the scenarios Major effect trough blowing and heat extraction –Influence of parameters during gas cooling phase –Re-ignition probability

36 Flame tackling time

37 ResultsResults Fire suppression capabilities –Flame tackling time –Influence of parameters during gas cooling phase Initial “plateau” Reducing fuel surface: faster to reach safe level Increasing opening size: faster to reach safe level Reducing water flow rate: cooling down more difficult –Re-ignition probability Fire suppression capabilities –Flame tackling time –Influence of parameters during gas cooling phase Initial “plateau” Reducing fuel surface: faster to reach safe level Increasing opening size: faster to reach safe level Reducing water flow rate: cooling down more difficult –Re-ignition probability

38 Gas cooling phase Entire fire development, shown 40 times faster

39 Gas cooling phase Extinguishing phase, 4 times faster

40 ResultsResults Fire suppression capabilities –Flame tackling time –Influence of parameters during gas cooling phase –Re-ignition probability Likely to occur No significant temperature or fire rise within 3 min Limited action of surface cooling Requires to wet the remaining charring material Fire suppression capabilities –Flame tackling time –Influence of parameters during gas cooling phase –Re-ignition probability Likely to occur No significant temperature or fire rise within 3 min Limited action of surface cooling Requires to wet the remaining charring material

41 Re-ignition probability

42 ResultsResults Safety concerns –Life safety Radiation shielding Remaining of the “oxygen survival layer” No high temperature or smoke feed back –Property safety Safety concerns –Life safety Radiation shielding Remaining of the “oxygen survival layer” No high temperature or smoke feed back –Property safety

43 Life safety Radiation shielding

44 Spraying period

45 ResultsResults Safety concerns –Life safety Radiation shielding Remaining of the “oxygen survival layer” –Also mixing & temperature destratification No high temperature or smoke feed back –Property safety Safety concerns –Life safety Radiation shielding Remaining of the “oxygen survival layer” –Also mixing & temperature destratification No high temperature or smoke feed back –Property safety

46 Mixing and temperature destratification Scenario n°6

47 ResultsResults Safety concerns –Life safety Radiation shielding Remaining of the “oxygen survival layer” No high temperature or smoke feed back –Property safety Safety concerns –Life safety Radiation shielding Remaining of the “oxygen survival layer” No high temperature or smoke feed back –Property safety

48 Life safety

49 ResultsResults Safety concerns –Life safety –Property safety No water damage No over pressure Safety concerns –Life safety –Property safety No water damage No over pressure

50 Property safety

51 ConclusionConclusion Publication Translation in french Haut-Rhin Fire & Rescue Services FIREFIGHT? Publication Translation in french Haut-Rhin Fire & Rescue Services FIREFIGHT?

52 Thank you for listening Questions?


Download ppt "Assessment Of Fire Suppression Capabilities Of Water Mist -Fighting Compartment Fires with the Cutting Extinguisher- FIREFIGHT II Mid-term Meeting Wednesday."

Similar presentations


Ads by Google