BRANZ. Welcome to BRANZ



  BRANZFIRE Features

Number of rooms

  • 12

Wall vents

  • Unlimited number
  • Uses CCFM algorithm

Ceiling vents

  • Unlimited number
  • Uses VENTCF2A algorithm

Automatic opening of vents by detectors

  • Yes

Mechanical ventilation

  • Extract or supply
  • Includes plug holing effects
  • Multiple fans per room

Model non-fire rooms as single zone

  • Optional

Sprinkler response

  • 1 sprinkler per room
  • NIST JET algorithm option, which accounts for the presence of a hot layer
  • Alpert ceiling jet option
  • Suppression option (effect on HRR only)

Smoke detectors

  • 1 per room
  • Treat as thermal detector or specify optical density for activation
  • Uses smoke concentration in the ceiling jet

Operating system and user interface

  • Microsoft Windows

Heat transfer

  • 4 wall radiation exchange
  • Emission-absorption by gas layers

Flame spread on surface lining materials

  • Walls, ceilings
  • ISO 9705 fire test simulation
  • Requires cone calorimeter data as material input

Automatic glass fracture in vents

  • Yes

CO generation algorithm

  • Yes

Oxygen-constrained burning

  • Yes

Fire object database

  • Yes, plus option to connect to online database at University of Canterbury

Materials database

  • Yes

Export results to Excel

  • Excel 97, 2000 includes automatic charting of key variables

Post-flashover fire

  • Pyrolysis model based on wood crib characteristics
  • Calculates equivalent time of radiation exposure in a standard furnace test

Output variables

  • Upper and lower layer temperatures
  • Layer height
  • Vent fires
  • Pressure
  • Heat release rate
  • Species concentrations CO2, CO, H2O, O2
  • Species concentrations unburned fuel
  • Optical density
  • Visibility
  • Radiation flux to target
  • Surface temperatures
  • Pyrolysis fronts for flame spread routines
  • Flame spread velocity
  • Fractional effective dose (narcotic gases)
  • Fractional effective dose (thermal)
  • Plume flow
  • Mass loss rate
  • Detailed vent flow by slab for individual vents
  • Smoke production rate