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 Engineering Laboratory /                  Fire Research Division
      National Fire Research Laboratory


    Breadcrumb
    Fire Calorimetry Database (FCD)
          Multiple Item Transient Combustion CalorimetryTest11_4boxRags_r1

      Table 1. Test Information
        Name
            Test11_4boxRags_r1Date
            12/06/2019 6:18:16 AM ESTDescription
            4 box of rags, ignite with 8 wicks soaked in 10 mL each, one wick at base of each face. ignition marked as last wick is lit with torchSpecimen
            cardboard boxes filled with cotton ragsIgnition
            acetone wicksProject ID (s)
            Multiple Item Transient Combustion CalorimetryTest Director
            McGrattanDownload CSV data file

      Timelapse Video with Heat Release Rate Plot
  Your browser does not support the video tag.Table 2. Summary of Test Results
        Measurement
          Value
          Uc
          UnitPeak Heat Release Rate, PHRR
            345
            17
            kWTime to Peak Heat Release Rate
            3.32
            0.17
            minTotal Heat Released, THR
            250
            16
            MJNatural Gas Burner Total Heat Released, NGTHR
            0
            -
            MJHeat Release Quality Confirmation, HRQC
            Not measured
            -
            MJ/MJNet Specimen Mass (gravimetric), NM = Mi-Mf
            17.450
            0.028
            kgNet Effective Heat of Combustion = THR / NM
            14.32
            0.93
            MJ/kgO2 Yield = O2 Consumed / NM
            1.047
            0.034
            kg/kgCO2 Yield = CO2 Generated / NM
            1.396
            0.050
            kg/kgCO Yield = CO Generated / NM
            0.0590
            0.0021
            kg/kgSoot Yield = Soot Generated / NM
            0.00353
            0.00082
            kg/kgBaseline Hood Exhaust Flow
            16.49
            0.49
            kg/sTest Duration = Time(Fire Out) - Time(Ignition)
            61.77
            0.03
            min*Uc = Combined Expanded Uncertainty with 95% confidence level*

      Table 3. Summary of Test Input Parameters
        Parameter
          Value
          Uc
          UnitFuel Type
            Cellulose
            -
            -Hood Size
            6
            -
            mEffective Duct Diameter
            1.975
            0.005
            mExhaust Flow Correction Factor
            1.028
            0.029
            -Net Heat of Combustion (per unit mass O2), Ef
            13.61
            0.41
            MJ/kgNet Heat of Combustion(per unit mass fuel), HOCf
            16.12
            0.60
            MJ/kgInitial Specimen Mass, Mi (gravimetric)
            17.98
            0.02
            kgFinal Specimen Mass, Mf (gravimetric)
            0.53
            0.02
            kgPlot 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 Image1
  0.00
  Ignition
  Ignition
  peak
  3.32
  Peak HRR
  Peak HRR
  2
  32.35
  stir embers
  stir embers
  3
  37.53
  stir embers
  stir embers
  4
  41.93
  stir embers
  stir embers
  5
  47.57
  stir embers
  stir embers
  6
  51.37
  stir embers
  stir embers
  7
  61.77
  Fire Out
  Fire OutTable 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, 2019https://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_8.3.3


      Last Updated May 14, 2021
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