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  • 1
    Electronic Resource
    Electronic Resource
    Extensions To Standard Hold Time Calculations (2000)
    Springer
    Fire technology 36 (2000), S. 266-278 
    Details
    ISSN: 1572-8099
    Keywords: integrity test ; hold time ; retention time ; standard ; descending interface ; sharp interface ; wide interface ; concentration profile ; continuous mixing ; Halon ; clean agent ; fire extinguishing gas ; fire extinguishing system
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying
    Notes: Abstract The paper extends existing methods of calculating the hold time for a fire extinguishing gas in an enclosure to cover mechanical HVAC systems and wide descending interfaces, and compares the wide descending interface model's predictions with some experimental data. A simple approximation to the measured wide descending interface gives conservative hold time predictions, while the sharp descending interface model used in current standards gives optimistic predictions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1015479114491
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Review of Fan Integrity Testing and Hold Time Standards (2000)
    Springer
    Fire technology 36 (2000), S. 249-265 
    Details
    ISSN: 1572-8099
    Keywords: integrity test ; hold time ; retention time ; standard ; airtightness ; air leakage ; airtightness measurement ; leakage measurement ; pressurisation test ; fan pressurisation ; leakage area ; leakage exponent ; lower leakage fraction ; bias pressure ; descending interface ; sharp interface ; wide interface ; continuous mixing ; Halon ; clean agent ; fire extinguishing gas ; fire extinguishing system
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying
    Notes: Abstract The paper examines the basis of the NFPA, British and ISO/CEN fan integrity testing and hold time standards. It is found that the most appropriate leakage area definition for integrity testing is Equivalent Leakage Area in CAN/CGSB-149.10-M86. Differences between the standards are discussed, an error in the NFPA standards is described, and other changes to the standards are recommended. Areas for further research are proposed to enable the errors in calculated hold times to be estimated with confidence and, if necessary, reduced.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1015427130420
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    Paper (German National Licenses)
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