Name | Test38_4box_R4
|
---|---|
Date | |
Description | 4 cardboard boxes 2x2 array, with crinkle paper. ignite with 16 wicks soaked in 10 mL each, centered at base of each face. ignition marked as last wick is lit with torch. Separated by 2 ft. |
Specimen | cardboard boxes filled with paper
|
Ignition | acetone wick
|
Project ID (s) | |
Test Director | McGrattan
|
Measurement | Value | Uc | Unit |
---|---|---|---|
Peak Heat Release Rate, PHRR
|
1,964
|
101
|
kW
|
Time to Peak Heat Release Rate
|
2.92
|
0.17
|
min
|
Total Heat Released, THR
|
471
|
28
|
MJ
|
Natural Gas Burner Total Heat Released, NGTHR
|
0
|
- | MJ
|
Heat Release Quality Confirmation, HRQC
|
Not measured | - | MJ/MJ
|
Net Specimen Mass (gravimetric), NM = Mi-Mf
|
31.020
|
0.028
|
kg
|
Net Effective Heat of Combustion = THR / NM
|
15.19
|
0.89
|
MJ/kg
|
O2 Yield = O2 Consumed / NM
|
1.135
|
0.036
|
kg/kg
|
CO2 Yield = CO2 Generated / NM
|
1.513
|
0.054
|
kg/kg
|
CO Yield = CO Generated / NM
|
0.0389
|
0.0014
|
kg/kg
|
Soot Yield = Soot Generated / NM
|
0.00227
|
0.00050
|
kg/kg
|
Baseline Hood Exhaust Flow
|
20.59
|
0.62
|
kg/s
|
Test Duration = Time(Fire Out) - Time(Ignition)
|
35.37
|
0.03
|
min
|
Uc = Combined Expanded Uncertainty with 95% confidence level
Parameter | Value | Uc | Unit |
---|---|---|---|
Fuel Type
|
Cellulose
|
- | - |
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
|
13.61
|
0.54
|
MJ/kg
|
Net Heat of Combustion(per unit mass fuel), HOCf
|
16.12
|
0.50
|
MJ/kg
|
Initial Specimen Mass, Mi (gravimetric)
|
32.00
|
0.02
|
kg
|
Final Specimen Mass, Mf (gravimetric)
|
0.98
|
0.02
|
kg
|
Event | Time (min) | Description | Video Snapshot Image |
---|---|---|---|
1
|
0.00
|
Ignition
|
|
peak
|
2.92
|
Peak HRR
|
|
2
|
23.18
|
stir embers
|
|
3
|
35.37
|
Fire Out
|
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