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Engineering Laboratory / Fire Research Division

National Fire Research Laboratory

Test2_PMMA_R2

Table 1. Test Information
Name
Test2_PMMA_R2
Date
Description

1/4" thick, 24" wide, 96"tall panels of cast Black PMMA backed by aluminum foil layer mounted to 1" thick Marinite board. Ignite using rectangular propane burner @ 60kW, turn burner off after sustained flaming of panels. Heat flux gauges mounted flush with fuel surface
Specimen
1/4" thick, 24" wide, 96" tall panels of cast Black PMMA
Ignition
propane burner
Project ID (s)
Vertical Upward Flamespread on Parallel Panels
Test Director
Leventon

Timelapse Video with Heat Release Rate Plot

Table 2. Summary of Test Results
Measurement Value Uc Unit
Peak Heat Release Rate, PHRR
2,882
125
kW
Time to Peak Heat Release Rate
6.67
0.17
min
Total Heat Released, THR
506
24
MJ
Gas Burner Total Heat Released, NGTHR
7.20
0.22
MJ
Heat Release Quality Confirmation, HRQC
 Not measured -
MJ/MJ
Net Specimen Mass (gravimetric), NM = Mi-Mf
20.75
0.28
kg
Net Effective Heat of Combustion = THR / NM
24.4
1.2
MJ/kg
O2 Yield = O2 Consumed / NM
1.888
0.066
kg/kg
CO2 Yield = CO2 Generated / NM
2.208
0.085
kg/kg
CO Yield = CO Generated / NM
0.0046
0.0013
kg/kg
Soot Yield = Soot Generated / NM
0.00529
0.00073
kg/kg
Baseline Hood Exhaust Flow
17.44
0.52
kg/s
Test Duration = Time(Fire Out) - Time(Ignition)
18.55
0.03
min

Uc = Combined Expanded Uncertainty with 95% confidence level

Table 3. Summary of Test Input Parameters
Parameter Value Uc Unit
Fuel Type
Polymethyl methacrylate (PMMA)
 - -
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
12.98
0.39
MJ/kg
Net Heat of Combustion(per unit mass fuel), HOCf
24.88
1.00
MJ/kg
Initial Specimen Mass, Mi (gravimetric)
20.75
0.20
kg
Final Specimen Mass, Mf (gravimetric)
below detection limit
0.20
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
2.03
Burner Off
Burner Off
peak
6.67
Peak HRR
Peak HRR
3
18.55
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_8.5.1
Last Updated December 7, 2023