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Engineering Laboratory / Fire Research Division

National Fire Research Laboratory

B1-2

Table 1. Test Information
Name
B1-2
Date
Description

Fire Barrier: B1, Cover Fabric: Polypropylene (3kg), Filling Material: Polyethalene (6kg) and Polyester (4 kg)
Specimen
upholstered chair mockup
Ignition
18 kW propane square burner
Project ID (s)
Fire Barriers in Full-Scale Chair Mock-ups
Test Director
Zammarano

Timelapse Video with Heat Release Rate Plot

Table 2. Summary of Test Results
Measurement Value Uc Unit
Peak Heat Release Rate, PHRR
1,063
64
kW
Time to Peak Heat Release Rate
19.70
0.17
min
Total Heat Released, THR
313
22
MJ
Natural Gas Burner Total Heat Released, NGTHR
0
 -
MJ
Heat Release Quality Confirmation, HRQC
 Not measured -
MJ/MJ
Net Specimen Mass (gravimetric), NM = Mi-Mf
13.54
0.11
kg
Net Effective Heat of Combustion = THR / NM
23.1
1.6
MJ/kg
O2 Yield = O2 Consumed / NM
1.739
0.058
kg/kg
CO2 Yield = CO2 Generated / NM
1.995
0.074
kg/kg
CO Yield = CO Generated / NM
0.0372
0.0014
kg/kg
Soot Yield = Soot Generated / NM
 Not measured -
kg/kg
Baseline Hood Exhaust Flow
21.36
0.64
kg/s
Test Duration = Time(Fire Out) - Time(Ignition)
37.68
0.03
min

Uc = Combined Expanded Uncertainty with 95% confidence level

Table 3. Summary of Test Input Parameters
Parameter Value Uc Unit
Fuel Type
Polyurethane Foam
 - -
Hood Size
6
 -
m
Effective Duct Diameter
1.975
0.005
m
Exhaust Flow Correction Factor
1.028
0.029
 -
Net Heat of Combustion (per unit mass O2), Ef
13.10
0.66
MJ/kg
Net Heat of Combustion(per unit mass fuel), HOCf
20.00
4.00
MJ/kg
Initial Specimen Mass, Mi (gravimetric)
15.68
0.08
kg
Final Specimen Mass, Mf (gravimetric)
2.14
0.08
kg
Plot of Fire Heat Release Rate with event markers. Uncertainty bar shown at peak value.
Figure 1. Plot of Heat Release Rate data with event markers and error bars shown at peak.
Table 4. Summary of Observed Test Events
Event Time (min) Description Video Snapshot Image
1
0.00
Ignition
Ignition
2
1.35
Burner removed
Burner removed
3
4.43
Dripping
Dripping
4
11.97
Pool fire
Pool fire
peak
19.70
Peak HRR
Peak HRR
5
37.00
Suppression
Suppression
6
37.68
Fire Out
Fire Out

Table 5. Supplemental Data Plots

Plot of Oxygen Dry Volume Fraction in hood exhaust stream.
Plot of Oxygen Dry Volume Fraction in hood exhaust stream.
Plot of Carbon Dioxide Dry Volume Fraction in hood exhaust stream.
Plot of Carbon Dioxide Dry Volume Fraction in hood exhaust stream.
Plot of Carbon Monoxide Dry Volume Fraction in hood exhaust stream.
Plot of Carbon Monoxide Dry Volume Fraction in hood exhaust stream.
Plot of Radiant Heat Flux data with event markers. r= radial distance from center of hood, h=height above floor.
Plot of Radiant Heat Flux data with event markers. r= radial distance from center of hood, h=height above floor.
Plot of Smoke Laser Extinction Coefficient in hood exhaust stream.
Plot of Smoke Laser Extinction Coefficient in hood exhaust stream.
Plot of Exhaust Duct Mass Flow Rate.
Plot of Exhaust Duct Mass Flow Rate.

Bryant, R. and Bundy, M. The NIST 20 MW Calorimetry Measurement System for Large-Fire Research, Technical Note (NIST TN) 2077, 2019
https://doi.org/10.6028/NIST.TN.2077

NIST Fire Calorimetry Database (FCD)
https://doi.org/10.18434/mds2-2314

Report Process Script Version
NFRL_Report_8.3.3
Last Updated May 14, 2021