ASSESSMENT OF POSSIBILITIES OF COOPERATION BETWEEN SMOKE ... · PDF fileASSESSMENT OF...
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ASSESSMENT OF POSSIBILITIES
OF COOPERATION BETWEEN SMOKE
AND HEAT EXHAUST VENTILATION
AND WATER MIST INSTALLATION IN BUILDINGS
Marek Stojek, Ph.D.
Fire Safety Expert
Senior HVAC,SHEVS Design Engineer
email: [email protected]
mobile: +48 509 799 118; +48 509 799 120
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AGENDA
1. BASIC
2. FIREFIGHTING SYSTEMS
3. NEW DESIGN
4. APPLICATIONS
5. CONCLUSION
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BASIC INFORMATION
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BASIC INFORMATION - FIRE
Source: BRE Guidance and Report 2008 (www.bre.co.uk)
FIRE GROWTH IN ENCLOSURE
30 seconds 75 seconds 135 seconds
180 seconds 197 seconds 200 seconds
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BASIC INFORMATION - FIRE
IGNITION GROWTH FULLY
DEVELOPEDDECAY
TR
OO
M /V
SM
OK
E
SMOKE
HEAT
TIME
FIRE GROWTH IN ENCLOSURE
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BASIC INFORMATION - FIRE
CAR
Heat release rate 5 MW
Smoke volume flow rate 20 m³/s (72.000 m³/h)
COMPUTER PRINTER
Heat release rate 300 kW
Smoke volume flow rate 0,5 m³/s (1.800 m³/h)
REFRIGERATOR
Heat release rate 500 kW
Smoke volume flow rate 1,5 m³/s (5.400 m³/h)
Source: vfdb (www.vfdb.de)
COMBUSTION PRODUCTS AND GASES
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BASIC INFORMATION - FIRE
FIRE GROWTH IN ENCLOSURE - EVACUATION SAFETY
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BASIC INFORMATION - FIRE
EVACUATION SAFETY
20m
VISIBILITY AIR
TEMPERATURE
CARBON DIOXIDE
CONCENTRATION
<10m
CRITICAL
<60oC
>170oC
CRITICAL
<300ppm
>8000ppm
CRITICAL
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BASIC INFORMATION - FIRE
DEVELOPMENT OF FIRE – SMOKE CONTROL VENTILATION
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FIREFIGHTING SYSTEMS
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FIREFIGHTING SYSTEMS
ESTIMATED VALUE OF THE DAMAGES DUE TO FIRES IN GERMANY
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FIREFIGHTING SYSTEMS
another systems
(CCTV, BMS itp.)
VASvoice alarm system
PSanother
protection
systems
FFSfixed firefighting
system
FDASfire detection
and fire alarm
system
SHEVSsmoke and heat
exhaust ventilation
system
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FIREFIGHTING SYSTEMS
WITHOUT SHEVS MECHANICAL SHEVS
SMOKE AND HEAT EXHAUST VENTILATION SYSTEMS (SHEVS)
Source: vfdb (www.vfdb.de)
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FIREFIGHTING SYSTEMS
SMOKE AND HEAT EXHAUST VENTILATION SYSTEMS (SHEVS)
Source: vfdb (www.vfdb.de)
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FIREFIGHTING SYSTEMS
TIME [min]
FIRE GROWTH
SMO
KE
/TE
MP
ERA
TUR
E
TIME [min]
SMO
KE
/ TE
MP
ERA
TUR
E
FIRE GROWTH
WITHOUT SHEVS NATURAL/MECHANICAL SHEVS
Source: Prof. Obuchow, Fachverband TR e. V.
SMOKE
SMOKE
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FIREFIGHTING SYSTEMS
SMOKE AND HEAT EXHAUST VENTILATION SYSTEMS (SHEVS)
Source: vfdb (www.vfdb.de)
MECHANICAL SHEVS NATURAL SHEVS
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FIREFIGHTING SYSTEMS
FIXED WATER FIREFIGHTING SYSTEMS
SPRINKLER SYSTEM WATER MIST SYSTEM
dropel diameter > 1 mm
Reaction surface from 1 liter water ~ 3 m2
dropel diameter < 1 mm
Reaction surface from 1 liter water ~ 60 m2
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FIREFIGHTING SYSTEMS
STAGE 1
STAGE 2
PROBLEMS OF COOPERATION BETWEEN SMOKE AND HEAT EXHAUST VENTILATION
AND FIXED WATER-BASED FIREFIGHTING SYSTEM
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FIREFIGHTING SYSTEMS
WATER FIREFIGHTING SYSTEM
1. WILL LIMIT FIRE SPREAD
AND CONTROL GROWTH
2. WILL NOT REDUCE SMOKE
DAMAGE
INTERACTION
SMOKE CONTROL VENTILATION
1. WILL PREVENT SMOKE LOGGING
2. ASSIST ESCAPE
3. AID FIRE FIGHTING
PROBLEMS OF COOPERATION BETWEEN SMOKE AND HEAT EXHAUST VENTILATION
AND FIXED WATER-BASED FIREFIGHTING SYSTEM
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NEW DESIGN
COOPERATION BETWEEN SHEVS AND WATER MIST
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NEW DESIGN
IMPORTANT PHENOMENA
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NEW DESIGN
Cooling Effect (smoke and surface)
Reduction of Radiant Heat
Oxygen Depletion
Interaction with Smoke
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NEW DESIGN
WATER SPRAY
NOZZLE
PRINCIPLE OF OPERATION
AIR SUPPLY
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NEW DESIGN
Standards:1. ISO/TS 17431:2006 Fire tests –Reduced-scale model box test
2. NFPA 204
RESEARCH – TEST STAND
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NEW DESIGN
TRADITIONAL SHEVS COOPERATION BETWEEN SHEVSAND WATER MIST INSTALLATION
NUMERICAL CALCULATIONS (CFD)
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NEW DESIGN
NUMERICAL CALCULATIONS (CFD)
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NEW DESIGN
DROPLET TRAJECTORY MODEL – TRAVEL DISTANCES
Source: BRE Centre for Fire Safety Engineering University of Edinburgh
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NEW DESIGN
0
20
40
60
EFFICIENCYTEMPERATURE
REDUCTION[%]
SHEVS+ WATER MIST
EFFICIENCY TEMPERATURE REDUCTION
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NEW DESIGN
COMPARISON
AIR (SHEVS) AIR (SHEVS) + WATER MIST
TRADITIONAL SHEVS
NOZZLE
COOPERATION BETWEEN SHEVSAND WATER MIST INSTALLATION
100oC
165.000 m3/h 75.000 m3/h
100oC
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COOPERATION BETWEEN SHEVS AND WATER MIST
APPLICATIONS
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APPLICATIONS
PATENTS
SOLUTIONS ARE PROTECTED. ALL RIGHTS RESERVED.
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APPLICATIONS
MUSEUMS
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APPLICATIONS
WATER SPRAY NOZZLE SHEVS
MUSEUMS
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APPLICATIONS
MULTISTOREYED BUILDING
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ENERGY EFFICIENT HVAC AND SHEVS OF NEW AND MODERNIZED SHOPPING CENTRE
Diagrams of components
APPLICATIONS
MULTISTOREYED BUILDING
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APPLICATIONS
FACTORY BUILDING
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NEW AND MODERNIZED
BUILDING
Diagrams of components
APPLICATIONS
HIGHRISE BUILDING
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CONCLUSION
COOPERATION BETWEEN SHEVS AND WATER MIST
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BENEFITS
BENEFITS
Good possibility and efficiency of cooperation between fire
ventilation system and water mist system
Good capability of the cooperating systems for improvement
of human evacuation conditions
Good capability of heat absorbed by water mist
Good capability of protection technical equipment and elements
of a building
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THANK YOU FOR YOUR
KIND ATTENTION
Further information: MAREK STOJEK
e-mail: [email protected]
mobile phone: +48 509 799 118