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 Engineering Laboratory /                  Fire Research Division
      National Fire Research Laboratory


    Breadcrumb
    Fire Calorimetry Database (FCD)
          Dry Tree Fire HazardWateredTree3

      Table 1. Test Information
        Name
            WateredTree3Date
            11/08/2017 4:15:35 AM ESTDescription
            Seven foot tall douglas fir pine tree cut fresh 4 weeks prior to test. Not watered.  8 ft room corner with furniture and no sofit.Specimen
            watered pine tree, upholstered chair and shelf in room cornerIgnition
            electric matchProject ID (s)
            Dry Tree Fire HazardTest Director
            M. Hoehler, M. BundyDownload 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
            6.7
            4.3
            kWTime to Peak Heat Release Rate
            1.18
            0.17
            minTotal Heat Released, THR
            below detection limit
            0.60
            MJNatural Gas Burner Total Heat Released, NGTHR
            0
            -
            MJHeat Release Quality Confirmation, HRQC
            Not measured
            -
            MJ/MJNet Specimen Mass (gravimetric), NM = Mi-Mf
            Not measured
            -
            kgTotal Fuel Mass Burned, TFM = THR / HOCf
              below detection limit
              0.020
              kgNet Effective Heat of Combustion = THR / NM
            Not measured
            -
            MJ/kgO2 Yield = O2 Consumed / TFM
            below detection limit
            15
            kg/kgCO2 Yield = CO2 Generated / TFM
            below detection limit
            34
            kg/kgCO Yield = CO Generated / TFM
            below detection limit
            2.7
            kg/kgSoot Yield = Soot Generated / TFM
            Not measured
            -
            kg/kgBaseline Hood Exhaust Flow
            21.15
            0.63
            kg/sTest Duration = Time(Fire Out) - Time(Ignition)
            4.05
            0.03
            min*Uc = Combined Expanded Uncertainty with 95% confidence level*

      Table 3. Summary of Test Input Parameters
        Parameter
          Value
          Uc
          UnitFuel Type
            Cellulose, Plastic
            -
            -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
            13.10
            0.66
            MJ/kgNet Heat of Combustion(per unit mass fuel), HOCf
            30.00
            9.00
            MJ/kgInitial Specimen Mass, Mi (gravimetric)
            Not measured
            -
            kgFinal Specimen Mass, Mf (gravimetric)
            Not measured
            -
            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
  1.18
  Peak HRR
  Peak HRR
  2
  4.05
  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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