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  • 1.
    Byström, Alexandra
    et al.
    Luleå University of Technology, Sweden.
    Cheng, Xudong
    Luleå University of Technology, Sweden; University of Science and Technology of China, China.
    Wickström, Ulf
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Fire Research.
    Veljkovic, Milan
    Luleå University of Technology, Sweden.
    Measurement and calculation of adiabatic surface temperature in a full-scale compartment fire experiment2013In: Journal of fire sciences, ISSN 0734-9041, E-ISSN 1530-8049, Vol. 31, no 1, p. 35-50Article in journal (Refereed)
    Abstract [en]

    Adiabatic surface temperature is an efficient way of expressing thermal exposure. It can be used for bridging the gap between fire models and temperature models, as well as between fire testing and temperature models. In this study, a full-scale compartment fire experiment with wood crib fuel was carried out in a concrete building. Temperatures were measured with plate thermometers and ordinary thermocouples. Five plate thermometers and five thermocouples with a diameter of 0.25 mm were installed at different positions. These two different temperature devices recorded different temperatures, especially near the floor surface. The adiabatic surface temperature was derived by a heat balance analysis from the plate thermometer measurements. The thermal inertia of the plate thermometer was taken into account to correct the measured results. In addition, the fire experiment scenario was also simulated with fire dynamics simulator. The fire source was specified as a given heat release rate, which was calculated from the measured mass loss rate of the wood fuel. The adiabatic surface temperatures at these measuring positions were simulated by the fire dynamics simulator model and compared with the experimental adiabatic surface temperatures. The comparative results showed that fire dynamics simulator predicted the adiabatic surface temperature accurately during the steady-state period.

  • 2.
    Häggkvist, Andreas
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut.
    Sjöström, Johan
    RISE, SP – Sveriges Tekniska Forskningsinstitut.
    Wickström, Ulf
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Fire Research. Luleå Technical University, Sweden.
    Using plate thermometer measurements to calculate incident heat radiation2013In: Journal of fire sciences, ISSN 0734-9041, E-ISSN 1530-8049, Vol. 31, no 2, p. 166-177Article in journal (Refereed)
    Abstract [en]

    The plate thermometer is a device used mainly to measure temperatures in fire resistance tests according to ISO 834-1 and EN 1363-1 and to measure the so-called adiabatic surface temperature. However, it can also be used to measure incident radiant heat flux (q·″inc) as a simpler, more robust and less-expensive alternative to water-cooled heat flux meters. The accuracy of the measured q·″inc is subject to simplifications in the heat transfer analysis model and uncertainties of parameters such as convective heat transfer coefficients, emissivities and ambient gas temperatures. This study investigates the accuracy of the model itself, isolated from the uncertainties of the physical surrounding, by comparing a simple one-dimensional model to the results of finite element modelling. The so-obtained model includes a heat transfer coefficient due to heat losses of the plate thermometer, found to be KPT = 8 W/m2 K and a heat storage lumped heat capacity CPT = 4200 J/m2 K for an ISO/EN standard plate thermometer. The model is also compared to real field experiments.

  • 3.
    Li, Ying Zhen
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut.
    Hertzberg, Tommy
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Brandteknik, material (BRm).
    Scaling of internal wall temperatures in enclosure fires2015In: Journal of fire sciences, ISSN 0734-9041, E-ISSN 1530-8049, Vol. 33, no 2, p. 113-141Article in journal (Refereed)
    Abstract [en]

    Physical scaling is an efficient and cost-effective modeling tool to be used in fire safety engineering. Scaling of internal wall temperatures was investigated in room fire tests in three different scales, that is, full scale (1:1), medium scale (1:2), and small scale (1:3.5). The fire sources were either placed at the center or in the corner of the enclosures. The measured time-dependent internal wall temperatures, incident heat fluxes, and gas temperatures in different scales are compared and analyzed. Test results show that the proposed scaling method is able to scale the internal wall temperatures (temperatures inside the walls) and incident heat fluxes well, especially in medium scale.

  • 4.
    Nussbaum, Ralph
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, Trätek..
    Effect of low concentration fire retardant impregnations on wood charring rate and char field1988In: Journal of fire sciences, ISSN 0734-9041, E-ISSN 1530-8049, Vol. 6, p. 290-307Article in journal (Refereed)
  • 5.
    Östman, Birgit
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, Trätek..
    Fire retardant wood-fiber insulating board1984In: Journal of fire sciences, ISSN 0734-9041, E-ISSN 1530-8049, Vol. 2, no 6, p. 454-467Article in journal (Refereed)
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