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Engineering Laboratory / Fire Research Division

National Fire Research Laboratory

Test45_HIPS_R1

Table 1. Test Information
Name
Test45_HIPS_R1
Date
Description

1/4" thick, 24" wide, 96"tall panels of HIPS mounted to 1" thick Marinite board. Ignite using rectangular propane burner @ 60kW for ignition, burner shut off and shielded after sustained flaming of panels. Heat flux gauges mounted flush with fuel surface
Specimen
1/4" thick, 24" wide, 96" tall panels of HIPS
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
2,955
152
kW
Time to Peak Heat Release Rate
3.53
0.17
min
Total Heat Released, THR
509
29
MJ
Gas Burner Total Heat Released, NGTHR
4.68
0.14
MJ
Heat Release Quality Confirmation, HRQC
 Not measured -
MJ/MJ
Net Specimen Mass (gravimetric), NM = Mi-Mf
17.96
0.28
kg
Net Effective Heat of Combustion = THR / NM
28.3
1.7
MJ/kg
O2 Yield = O2 Consumed / NM
2.110
0.075
kg/kg
CO2 Yield = CO2 Generated / NM
2.139
0.084
kg/kg
CO Yield = CO Generated / NM
0.0676
0.0027
kg/kg
Soot Yield = Soot Generated / NM
0.200
0.027
kg/kg
Baseline Hood Exhaust Flow
21.28
0.64
kg/s
Test Duration = Time(Fire Out) - Time(Ignition)
33.82
0.03
min

Uc = Combined Expanded Uncertainty with 95% confidence level

Table 3. Summary of Test Input Parameters
Parameter Value Uc Unit
Fuel Type
High Impact Polystyrene (HIPS)
 - -
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
12.93
0.52
MJ/kg
Net Heat of Combustion(per unit mass fuel), HOCf
42.00
2.50
MJ/kg
Initial Specimen Mass, Mi (gravimetric)
19.66
0.20
kg
Final Specimen Mass, Mf (gravimetric)
1.70
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
1.28
gas off
gas off
3
1.80
burner covered w/ steel plate
burner covered w/ steel plate
4
2.80
start to pull gauge cover wires, one broke
start to pull gauge cover wires, one broke
peak
3.53
Peak HRR
Peak HRR
5
6.77
supression with garden hose
supression with garden hose
6
10.15
suppression with squirt bottle (cooling back of gauges)
suppression with squirt bottle (cooling back of gauges)
7
33.35
supression w/ garden hose
supression w/ garden hose
8
33.82
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 November 8, 2023