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Engineering Laboratory / Fire Research Division

National Fire Research Laboratory

CornerTest2

Table 1. Test Information
Name
CornerTest2
Date
Description

Mockup room corner test of furniture ignition for CLT project with NRCC. Shelf loading with pine crib stick and kitchen table with 6 chairs. 12 ft corner with 8ft ceiling and no soffit. Ignite with 50 kW natural gas burner. Repeat of test 1 with Gas Rack and FTIR
Specimen
room corner mockup
Ignition
natural gas burner
Project ID (s)
Cross Laminated Timber Compartments
Test Director
Hoehler

Timelapse Video with Heat Release Rate Plot

Table 2. Summary of Test Results
Measurement Value Uc Unit
Peak Heat Release Rate, PHRR
2,083
124
kW
Time to Peak Heat Release Rate
24.30
0.17
min
Total Heat Released, THR
1,572
97
MJ
Natural Gas Burner Total Heat Released, NGTHR
32.78
0.47
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
79.0
9.3
kg
Net Effective Heat of Combustion = THR / NM
 Not measured -
MJ/kg
O2 Yield = O2 Consumed / TFM
1.52
0.18
kg/kg
CO2 Yield = CO2 Generated / TFM
1.93
0.24
kg/kg
CO Yield = CO Generated / TFM
0.0243
0.0030
kg/kg
Soot Yield = Soot Generated / TFM
 Not measured -
kg/kg
Baseline Hood Exhaust Flow
21.50
0.65
kg/s
Test Duration = Time(Fire Out) - Time(Ignition)
43.67
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
6
 -
m
Effective Duct Diameter
1.975
0.005
m
Exhaust Flow Correction Factor
1.000
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
19.90
2.00
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.
Table 4. Summary of Observed Test Events
Event Time (min) Description Video Snapshot Image
1
0.00
Ignition
Ignition
2
10.28
chair ignition
chair ignition
3
10.47
Gas burner off
Gas burner off
4
14.18
FTIR pump on
FTIR pump on
5
15.50
Table ignition
Table ignition
6
23.67
all chairs ignited
all chairs ignited
peak
24.30
Peak HRR
Peak HRR
7
28.37
table collapse
table collapse
8
39.05
start water suppression
start water suppression
9
43.67
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