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OSB04b_ISOFire

Table 1. Test Information
Name
OSB04b_ISOFire
Date
Description

Oriented Strand Board OSB04 specimen. psuedo ISO fire ramp burner to 1600 kW over 60min. Hold at 1300kW for 30 min. MIDAS data collection on ventilation PC.

Specimen
Box Burner with Target Wall
Ignition
Pilot flame
Project ID (s)
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
2,156
134
kW
Time to Peak Heat Release Rate
57.72
0.17
min
Total Heat Released, THR
4,803
305
MJ
Natural Gas Burner Total Heat Released, NGTHR
4,375
63
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
96
11
kg
Net Effective Heat of Combustion = THR / NM
Not measured -
MJ/kg
O2 Yield = O2 Consumed / TFM
3.86
0.47
kg/kg
CO2 Yield = CO2 Generated / TFM
3.32
0.41
kg/kg
CO Yield = CO Generated / TFM
0.0298
0.0037
kg/kg
Soot Yield = Soot Generated / TFM
Not measured -
kg/kg
Baseline Hood Exhaust Flow
51.5
1.5
kg/s
Test Duration = Time(Fire Out) - Time(Ignition)
66.32
0.03
min

Uc = Combined Expanded Uncertainty with 95% confidence level

Table 3. Summary of Test Input Parameters
Parameter Value Uc Unit
Fuel Type
Natural Gas
- -
Hood Size
15
-
m
Effective Duct Diameter
2.424
0.005
m
Exhaust Flow Correction Factor
1.042
0.032
-
Net Heat of Combustion (per unit mass O2), Ef
12.54
0.63
MJ/kg
Net Heat of Combustion(per unit mass fuel), HOCf
50.00
5.00
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
1.05
start ISO curve burner ramp
start ISO curve burner ramp
3
18.57
hold burner at 1300 kW for 30 min
hold burner at 1300 kW for 30 min
4
41.97
Flame above wall
Flame above wall
5
48.87
continue iso ramp on HRR burner
continue iso ramp on HRR burner
peak
57.72
Peak HRR
Peak HRR
6
61.20
Burner Off?
Burner Off?
7
66.32
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_8.4.1
Last Updated November 3, 2021