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For Modeling Flammable and Explosive Chemical Accidental Releases
BREEZE HAZ FIRE/EXPLOSION is the
most comprehensive package for modeling flammable and explosive chemical
accidental releases. This package includes four fire models and four
explosion models that can be used to examine radiation/overpressure hazards
from various fire/explosion scenarios. The models are ideal for real-world
applications, such as control-room siting at a natural gas refinery, or
meeting governmental regulations, such as the US EPA's Risk Management Plan
(RMP) ruling.
The fire models
can be used to:
- Calculate values of thermal radiation at
various user-specified downwind distances from a fire
- Calculate the distance to user-specified
radiation values as required by EPA’s Risk Management Program (RMP) 5
kW/m2 alternative release scenario for flammable substances)
- Calculate the dynamic temperature rise of
a nearby structure exposed to the thermal radiation from a fire in a tank
or dike structure
- Determine downwind distances to
user-specified overpressure levels, such as the 1 psi overpressure level
required by RMP worst-case scenario, for flammable substances
Fire Models:
Confined Pool Fire was originally developed for the Gas Research
Institute (GRI) and models a fire that occurs when liquid is ignited in a
confined area such as a dike or a tank. The dike may be circular or
rectangular. The model calculates the distance to various radiation levels
specified by the user and also allows for the calculation of the dynamic
temperature rise of a nearby target.
Unconfined Pool Fire was originally developed for the Gas Research
Institute (GRI) and models a fire that occurs when an unconfined spreading
pool of liquefied fuel gas ignites. The model calculates the distance to
various radiation levels specified by the user and calculates the radiation
flux as a function of time at a given distance as the pool spreads.
Jet Fire
was originally developed for the Gas Research Institute (GRI) and models a
fire that may result from the leak or rupture of a pipeline containing a
compressed or liquefied gas under pressure. The model calculates the
distance to various radiation levels specified by the user and can calculate
the dimensions of a high velocity jet flame ensuing from a ruptured
pipeline.
BLEVE was originally developed for the Gas Research Institute (GRI)
and models a fire that may result from the leak or rupture of a pipeline
containing a compressed or liquefied gas under pressure. The model
calculates the distance to various radiation levels specified by the user
and can calculate the dimensions of a high velocity jet flame ensuing from a
ruptured pipeline.
Explosion Models:
U.S. Army TNT Equivalency was based on the work of the U.S. Army.
This model uses a proportional relationship between the flammable mass in
the cloud and an equivalent weight of TNT and assumes that the entire
flammable mass is involved in the explosion and that the explosion is
centered at a single location. The model uses one of two blast curves,
depending upon whether the explosion being modeled is a surface burst or a
free-air burst.
U.K. HSE TNT Equivalency was based on the work of the U.K. Health and
Safety Executive (HSE). This model uses a proportional relationship between
the flammable mass in the cloud and an equivalent weight of TNT. It assumes
that the entire flammable mass is involved in the explosion and that the
explosion is centered at a single location.
TNO Multi-Energy treats the explosive potential of the vapor cloud as
a corresponding number of equivalent fuel-air charges. The vapor cloud
explosion is modeled as a series of sub-blasts with each sub-blast
corresponding to a potential blast source within the cloud.
Baker-Strehlow
was based on the work of Baker and Strehlow and takes into account the
variability of the blast strength by expressing the explosion as a number of
fuel-air charges, each with individual characteristics.
The following productivity-enhancing features are found in BREEZE HAZ
FIRE/EXPLOSION:
- Comprehensive chemical database
- Importation of AutoCAD® DXF and BMP files
- Instant visualization of model results:
2-D contour plots, charts, and text summary reports
- Scenario management for “what-if”
meteorology and source scenarios
- Customizable display and toolbars
- Online documentation, sample applications,
and technical appendices
- Windows Explorer® -type interface
- Compatible with Microsoft Excel® cut/paste
options
- GIS Interface
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Fire/Explosion Software
