fire simulation software
DESCRIPTION
Fire Simulation Software. Carlos Gonzalez Garza. Objectives. European Building Regulations. Combustion Computational Fluid Dynamics Discretization Method Software CFD Case Study Ex-USS Shadwel Fire Evaluation Case Study Underground Shoping Centre. European Regulations. - PowerPoint PPT PresentationTRANSCRIPT
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Fire Simulation SoftwareCarlos Gonzalez Garza
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Objectives
European Building Regulations. Combustion Computational Fluid Dynamics
Discretization Method Software CFD Case Study
Ex-USS Shadwel Fire Evaluation Case Study
Underground Shoping Centre
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European Regulations
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Protection of the health & safety of ALL building users
According to ISO FDIS 21542: ‘Building Construction – Accesibility & Usability of the Built Environment’.
10% of people have some sort of disability.
Its predicted that at somepoint the building will be at 120% of its capacity.
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Protection of property.
Protection of the health & safety of emergency first response personnel.
Facility, cost of reconstruction, refurbishment and repair after fire.
Protection of the natural environment from smoke, pollution adverse impacts.
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Combustion
Incipient Phase• 20 to 21%• 500 to 550 C
Free Burning Phase• 15 to 19%• 700 C
Smouldering Phase• Less than 15%• Above 550 C
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Computational Fluid Dynamics
CFD is the study of a fluid system that is varying statically or dynamically in function of space and time.
Used in: Aeronautics Automotive Industry Mechanical, electrical and
environmental engineers
“A computer simulation of high velocity air flow around the Space Shuttle during re-entry.”[1]
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Field Modeling Approach
The physical characteristics of a fluid in motion can be described by the consideration of mathematical equations governing a process of interest.
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Discretization
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Commercial Codes
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Ex-USS Shadwel
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A schematic of the different compartments of the ex-USS Shadwel lrepresented in the numerical simulations.
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A detailed view using velocity vectors to illustrate the flow field in the laundry room and the adjacent passageway.
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The simulated smoke spread within the ex-USS Shadwell shown using velocity (in cm/s) and temperature (in K) distributions.
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Results
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Fire Risk Evaluation Case Study
AREA 21677 m^2NET DEPTH 6.3 mLENGTH 150 mWIDTH 147.77
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Fire Risk Evaluation Case Study Results
F. Table of parameters related to functional areas. {Ren, 2007}.
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Fire Risk Evaluation Case Study CalculationsRSET Trset = talarm+tresp+tmove Where t alarm is the fire detection time.
t resp is the people reaction time.t move is the movement time of evacuation.
Normally t alarm = 15s and t resp = 30s t1 = t0 + s/v = t alarm + t resp + s/v s is the distance that people have to walk to an emergency exit = 150 mv is the velocity of evacuation According to the author the result obtained is 309 second that means that ASET > RSET.
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Corrective Measures
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Conclusions
Data obtained can be used to,
Improve the building fabric. Improve building air tightness. Design the HVAC systems. Design of lifts and emergency
stairwells.
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Any Questions? Many Thanks ¡