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Engineering Laboratory / Fire Research Division

National Fire Research Laboratory

e7_SCh0-5

Table 1. Test Information
Name
e7_SCh0-5
Date
Description

Experiment test #7: Steel, closet, high fuel load 4 @ 1A cribs, zero wind flow, 5' structural separation. ini mass 89.529 Kg
Specimen
wood cribs in steel shed
Ignition
heptane pan
Project ID (s)
Eaves and Vents Experiments (EaVE) Phase A
Test Director
Brown

Timelapse Video with Heat Release Rate Plot

Table 2. Summary of Test Results
Measurement Value Uc Unit
Peak Heat Release Rate, PHRR
1,856
113
kW
Time to Peak Heat Release Rate
13.87
0.07
min
Total Heat Released, THR
825
54
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
51.2
4.5
kg
Net Effective Heat of Combustion = THR / NM
 Not measured -
MJ/kg
O2 Yield = O2 Consumed / TFM
1.20
0.11
kg/kg
CO2 Yield = CO2 Generated / TFM
1.55
0.15
kg/kg
CO Yield = CO Generated / TFM
0.0195
0.0019
kg/kg
Soot Yield = Soot Generated / TFM
0.00257
0.00044
kg/kg
Baseline Hood Exhaust Flow
49.7
1.5
kg/s
Test Duration = Time(Fire Out) - Time(Ignition)
19.83
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
 - -
Hood Size
15
 -
m
Effective Duct Diameter
2.424
0.009
m
Exhaust Flow Correction Factor
1.042
0.032
 -
Net Heat of Combustion (per unit mass O2), Ef
13.61
0.68
MJ/kg
Net Heat of Combustion(per unit mass fuel), HOCf
16.12
1.00
MJ/kg
Initial Specimen Mass, Mi (gravimetric)
89.53
0.10
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
4.80
Embers thru vent
Embers thru vent
3
13.15
Rafters ignition
Rafters ignition
4
13.35
Flames thru vent
Flames thru vent
5
13.48
Attic ignition
Attic ignition
peak
13.87
Peak HRR
Peak HRR
6
13.93
water suppression
water suppression
7
19.83
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_8.7.0
Last Updated November 19, 2025
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