Abstract
This paper provides a comprehensive set of equations and guidelines to determine the rate of heat release in full-scale fire tests based on the O2 consumption principle. The approach is different from other investigators as the enphasis is on full-scale fire test applications and the use of volumetric flow rates is avoided. Some general equations for flow rate (i.e., applicable irrespective of the configuration of the gas analysis system) are described first. In subsequent sections, distinctions are made between various gas analyzer combinations to derive the equations for rate of heat release. Procedures to calculate net rate of heat release from a specimen exposed to a gas burner or wood crib ignition source are also given. A summary at the end of the paper lists step by step procedures for all cases covered.
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References
W. Thornton, “The Relation of Oxygen to the Heat of Combustion of Organic Compounds,”Philosophical Magazine and J. of Science,33 (1917).
C. Huggett, “Estimation of the Rate of Heat Release by Means of Oxygen Consumption,”J. of Fire and Flammability,12, pp. 61–65 (1980).
P. Hinkley, H. Wraight, and A. Wadley, “Rates of Heat Output and Heat Transfer in the Fire Propagation Test,” Fire Research Note No. 709, Fire Research Station, Borehamwood, England (1968).
W. Parker, “An Investigation of the Fire Environment in the ASTM E-84 Tunnel Test,” NBS Technical Note 945, National Bureau of Standards, Gaithersburg, MD (1977).
D. Sensenig, “An Oxygen Consumption Technique for Determining the Contribution of Interior Wall Finishes to Room Fires,” NBS Technical Note 1182, National Bureau of Standards, Gaithersburg, MD (1980).
W. Parker, “Calculations of the Heat Release Rate by Oxygen Consumption for Various Applications,” NBSIR 81-2427, National Bureau of Standards, Gaithersburg, MD (1982).
V. Babrauskas, “Development of the Cone Calorimeter—A Bench-scale Rate of Heat Release Apparatus Based on Oxygen Consumption,” NBSIR 82-2611, National Bureau of Standards, Gaithersburg, MD (1982).
V. Babrauskas, J. Lawson, W. Walton, and W. Twilley, “Upholstered Furniture Heat Release Rates Measured with the Furniture Calorimeter,” NBSIR 82-2604, National Bureau of Standards, Gaithersburg, MD (1982).
ASTM, “Proposed Method for Room Fire Test of Wall and Ceiling Materials and Assemblies,” ASTM Annual Book of Standards, 04.07, pp. 958–978 (1983).
ASME, “Fluid Meters—Their Theory and Application,” Report of the ASME Committee on Fluid Meters,” H. Bean, editor, Sixth Edition (1971).
E. Ower and R. Pankhurst,The Measurement of Air Flow, Pergamon Press, 5th Edition, pp. 112–147 (1977).
B. McCaffrey, and G. Heskestad, “A Robust Bidirectional Low-velocity Probe for Flame and Fire Application,”Combustion and Flame,26, pp. 125–127 (1976).
R. Reid, J. Prausnitz, and T. Sherwood,The Properties of Gases and Liquids, McGraw-Hill, 3rd Edition, p. 193, New York (1973).
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Janssens, M.L. Measuring rate of heat release by oxygen consumption. Fire Technol 27, 234–249 (1991). https://doi.org/10.1007/BF01038449
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DOI: https://doi.org/10.1007/BF01038449