Communications - Scientific Letters of the University of Zilina 2015, 17(1):67-72 | DOI: 10.26552/com.C.2015.1.67-72

Utility of Computer Modelling in Determination of Safe Available Evacuation Time

Vladimir Mozer1, Jiri Pokorny2, Petr Kucera3, Lubica Vrablova1, Peter Wilkinson4
1 Department of Fire Engineering, Faculty of Security Engineering, University of Zilina, Slovakia
2 Fire & Rescue Service, Department of prevention and CNP, Ostrava, Czech Republic
3 Department of Fire Protection, Faculty of Safety Engineering, Technical University of Ostrava, Czech Republic
4 Civil Safety and Security Unit, University of Leicester, United Kingdom

The main aim of the paper is to evaluate the primary factors affecting the safe available evacuation time with the utility of computer modelling, namely Consolidated Model of Fire and Smoke Transport (CFAST) computer model by NIST. The traditionally accepted base value of 2.5 minutes, used in many design standards, may not be appropriate due to its very generalised nature. Hence, a multi-criteria analysis is carried out in which four standard fire scenarios (fire growth rates) are modelled in a set of compartments with varying geometry. The simulation results are assessed against a range of critical conditions, including visibility, toxicity and temperature. Obtained safe available evacuation times are then compared to the standardised values used in design. The results show that the standardised times derived from the 2.5-minutes base value are not as conservative as believed; both under- and overprediction have been identified. The outcomes indicate that a review of the standardised available safe evacuation times should be carried out.

Keywords: available safe evacuation time (ASET; t2-fire; CFAST; layer height; toxicity

Published: February 28, 2015  Show citation

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Mozer, V., Pokorny, J., Kucera, P., Vrablova, L., & Wilkinson, P. (2015). Utility of Computer Modelling in Determination of Safe Available Evacuation Time. Communications - Scientific Letters of the University of Zilina, 17(1), 67-72. doi: 10.26552/com.C.2015.1.67-72
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    References

    1. STN 92 0201-1: Fire Safety of Buildings - Part 3. Escape Routes and Evacuation. B.m.: SUTN, 2000.
    2. Post War Building Studies, No. 29: Fire Grading of Buildings - Parts II., III. and IV., Her Majesty's Stationery Office, London, 1952.
    3. PEACOCK, R. D., RENEKE, P. A., FORNEY, G. P.: CFAST - Consolidated Model of Fire Growth and Smoke Transport (Version 6) User's Guide. NIST SP 1041r1. B.m.: National Institute of Standards and Technology, 2013. Go to original source...
    4. PEACOCK, R. D., RENEKE P. A., FORNEY G. P.: CFAST - Consolidated Model of Fire Growth and Smoke Transport (Version 6) Technical Reference Guide. NIST SP 1026r1. B.m.: National Institute of Standards and Technology, 2013. Go to original source...
    5. McGRATTAN, K. et al: Fire Dynamics Simulator Technical Reference Guide Vol. 1: Mathematical Model. NIST SP 1018, Sixth Edition. B.m.: National Institute of Standards and Technology, 2014.
    6. McGRATTAN, K. et al: Fire Dynamics Simulator User's Guide. NIST SP 1019, Sixth Edition. B.m.: National Institute of Standards and Technology, 2014.
    7. MOZER, V.: An Analysis of Factors Affecting Available Safe Escape Time. Advanced Materials Research, vol. 1001, 2014, pp. 267-271, ISSN 1662-8985. Go to original source...
    8. BLAGOJEVICH, M. D.: Time-temperature Curve Definition According to Fuel Type. Communications - Scientific Letters of the University of Zilina, No. 3, 2006, pp. 48-51, ISSN 1335-4205, 2006. Go to original source...
    9. MAYFIELD, C., HOPKIN, D.: Design Fires for Use in Fire Safety Engineering. Bracknell : IHS BRE Press : BRE Trust, ISBN 9781848061521, 2011.
    10. DINENNO, P. J.: SFPE Handbook of Fire Protection Engineering, 4th ed. Quincy, Mass. : Bethesda, Md: National Fire Protection Association : Society of Fire Protection Engineers, 2008, ISBN 9780877658214.
    11. PD 7974-1: Part 1 Initiation and Development of Fire within the Enclosure of Origin. London: BSI, 2003.
    12. KARLSSON, B., QUINTIERE, J.: Enclosure Fire Dynamics, Boca Raton : Taylor & Francis : Environmental & Energy Engineering, 2002, ISBN 9781420050219.
    13. CSN 73 0802: Fire Safety of Buildings - Non-industrial Buildings, Praha : Urad pro technickou normalizaci, metrologii a statni zkusebnictvi, 2009, 122 p.
    14. HOSSER, D. L.: Ingenieurmethoden des Brandschutzes. Braunschweig: Vereinigung zur Forderung des Deutschen Brandschutzes e.V., GFPA German Fire Protection Association, 2009, 386 p.
    15. Krajska hygienicka stanice se sidlem v Praze: Reduced Oxygen Levels in Workplace and their Effect on Employees' Health (in Czech), available online at: http://www.khsstc.cz/Soubor.ashx?souborID=1104&typ=application/pdf&nazev=Sn%C3%AD%C5%BEen%C3%BD%20obsah%20kysl%C3%ADku%20v%20pracovn%C3%ADm%20prost%C5%99ed%C3%AD.pdf, accessed on 05/09/2014.
    16. CLG. Approved Document B, vol. 1&2, 2006, Communities and Local Government.

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