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 Engineering Laboratory /                  Fire Research Division
      National Fire Research Laboratory


    Breadcrumb
    Fire Calorimetry Database (FCD)
          Structure Separation Experiments: Shed Burns without WindGasBurner_Flow25kgs_4MW

      Table 1. Test Information
        Name
            GasBurner_Flow25kgs_4MWDate
            04/08/2021 11:11:37 AM EDTDescription
            Natural Gas Confirmation using tube burner, burner at 58.42 cm above floor.Specimen
            Tube BurnerIgnition
            pilot flameProject ID (s)
            Structure Separation Experiments: Shed Burns without WindTest Director
            Maranghides ADownload 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
            4,440
            225
            kWTime to Peak Heat Release Rate
            18.87
            0.17
            minTotal Heat Released, THR
            2,048
            106
            MJNatural Gas Burner Total Heat Released, NGTHR
            2,097
            30
            MJHeat Release Quality Confirmation, HRQC
            0.979
            0.052
            MJ/MJNet Specimen Mass (gravimetric), NM = Mi-Mf
            Not measured
            -
            kgTotal Fuel Mass Burned, TFM = THR / HOCf
              41.0
              2.4
              kgNet Effective Heat of Combustion = THR / NM
            Not measured
            -
            MJ/kgO2 Yield = O2 Consumed / TFM
            3.64
            0.25
            kg/kgCO2 Yield = CO2 Generated / TFM
            2.83
            0.20
            kg/kgCO Yield = CO Generated / TFM
            below detection limit
            0.00025
            kg/kgSoot Yield = Soot Generated / TFM
            0.0000645
            0.0000090
            kg/kgBaseline Hood Exhaust Flow
            25.49
            0.76
            kg/sTest Duration = Time(Fire Out) - Time(Ignition)
            24.08
            0.03
            min*Uc = Combined Expanded Uncertainty with 95% confidence level*

      Table 3. Summary of Test Input Parameters
        Parameter
          Value
          Uc
          UnitFuel Type
            Natural Gas
            -
            -Hood Size
            9
            -
            mEffective Duct Diameter
            1.975
            0.005
            mExhaust Flow Correction Factor
            1.055
            0.034
            -Net Heat of Combustion (per unit mass O2), Ef
            12.54
            0.50
            MJ/kgNet Heat of Combustion(per unit mass fuel), HOCf
            50.00
            1.50
            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
  18.87
  Peak HRR
  Peak HRR
  2
  24.08
  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_8.4.6


      Last Updated September 22, 2022
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