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Engineering Laboratory / Fire Research Division

National Fire Research Laboratory

Test_2

Table 1. Test Information
Name
Test_2
Date
Description

Upholstered sofa in 3.7 m × 3.7 m × 2.4 m furnished room. Ignition by 1" propane flame at polyester pillow. BOB 360 video in room. Flashover observed.
Specimen
Cotton fabric sofa w/ partial-coverage type 1 barrier in furnished room
Ignition
propane wand
Project ID (s)
Room Flashover Experiments to Demonstrate the Effectiveness of Barrier Fabrics
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
8,422
501
kW
Time to Peak Heat Release Rate
21.65
0.07
min
Total Heat Released, THR
2,246
142
MJ
Gas Burner Total Heat Released, NGTHR
0
 -
MJ
Heat Release Quality Confirmation, HRQC
 Not measured -
MJ/MJ
Net Specimen Mass (gravimetric), NM = Mi-Mf
 Not measured -
kg
Total Fuel Mass Burned, TFM = THR / HOCf
75
16
kg
Net Effective Heat of Combustion = THR / NM
 Not measured -
MJ/kg
O2 Yield = O2 Consumed / TFM
2.28
0.48
kg/kg
CO2 Yield = CO2 Generated / TFM
2.92
0.62
kg/kg
CO Yield = CO Generated / TFM
0.0440
0.0094
kg/kg
Soot Yield = Soot Generated / TFM
0.0112
0.0031
kg/kg
Baseline Hood Exhaust Flow
46.2
1.4
kg/s
Test Duration = Time(Fire Out) - Time(Ignition)
54.22
0.03
min

Uc = Combined Expanded Uncertainty with 95% confidence level

Table 3. Summary of Test Input Parameters
Parameter Value Uc Unit
Fuel Type
Cellulose, Plastic
 - -
Hood Size
9
 -
m
Effective Duct Diameter
1.975
0.005
m
Exhaust Flow Correction Factor
1.055
0.034
 -
Net Heat of Combustion (per unit mass O2), Ef
13.10
0.66
MJ/kg
Net Heat of Combustion(per unit mass fuel), HOCf
30.00
6.00
MJ/kg
Initial Specimen Mass, Mi (gravimetric)
 Not measured -
kg
Final Specimen Mass, Mf (gravimetric)
 Not measured -
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.
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Table 4. Summary of Observed Test Events
Event Time (min) Description Video Snapshot Image
1
0.00
Ignition
Ignition
Download
2
20.92
flashover
flashover
Download
peak
21.65
Peak HRR
Peak HRR
Download
3
30.42
hcn sample pumps stopped 1 minute post flashover
hcn sample pumps stopped 1 minute post flashover
Download
4
50.12
Suppression
Suppression
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5
54.22
Fire Out
Fire Out
Download
6
54.40
room clear
room clear
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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.
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Plot of Carbon Dioxide Dry Volume Fraction in hood exhaust stream.
Plot of Carbon Dioxide Dry Volume Fraction in hood exhaust stream.
Download
Plot of Carbon Monoxide Dry Volume Fraction in hood exhaust stream.
Plot of Carbon Monoxide Dry Volume Fraction in hood exhaust stream.
Download
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.
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Plot of Smoke Laser Extinction Coefficient in hood exhaust stream.
Plot of Smoke Laser Extinction Coefficient in hood exhaust stream.
Download
Plot of Exhaust Duct Mass Flow Rate.
Plot of Exhaust Duct Mass Flow Rate.
Download

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(link is external)

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

Report Process Script Version
NFRL_Report_8.5.9
Last Updated February 28, 2025