Using plate thermometer measurements to calculate incident heat radiation

Häggkvist, Andreas; Sjöström, Johan; Wickström, Ulf

doi:10.1177/0734904112459264

Cited by 36 publications

(31 citation statements)

References 7 publications

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“…In the numerical, we have implemented a physical object with the same dimensions as the experimental counterpart. The thermal material data of the Inconel were taken from the manufacturer's data sheet while the insulation material was characterized by the transient plane source method at SP . The emissivity of the steel plate was set to 0.8, which is based on absorptivity measurements.…”

Section: The Numerical Workmentioning

confidence: 99%

“…The thermal material data of the Inconel were taken from the manufacturer's data sheet while the insulation material was characterized by the transient plane source method at SP. 19,20 The emissivity of the steel plate was set to 0.8, which is based on absorptivity measurements. To validate the model in FDS, a comparison of the step response time was made using a 35-kW/m 2 heat exposure in the cone calorimeter, which yielded a very good agreement.…”

Section: The Numerical Workmentioning

confidence: 99%

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Modeling of fire exposure in facade fire testing

Anderson¹,

Boström²,

McNamee³

et al. 2017

Fire and Materials

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Summary In this paper, a comparative simulation study on 3 large‐scale facade testing methods, namely, the SP Fire 105, BS 8414‐1, and the ISO 13785‐2 methods, is presented. Generally good correspondence between simulations and experimental data has been found, provided that thermal properties of the facade material and heat release rates are known; however, the correspondence deviates in close proximity of the fire source. Furthermore, a statistical ensemble for evaluating the effects stemming from uncertainty in input data is used. Here, it was found using this statistical ensemble that the variability was smaller in the ISO 13785‐2 compared to the BS 8414‐1 method. The heat release rates (HRR) used in the simulations were adopted from measurements except for the ISO method where the information in the standard was used to approximate the HRR. A quantitative similarity between the HRR in the ISO method and the British method was found.

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Section: The Numerical Workmentioning

confidence: 99%

Section: The Numerical Workmentioning

confidence: 99%

Modeling of fire exposure in facade fire testing

Anderson¹,

Boström²,

McNamee³

et al. 2017

Fire and Materials

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“…Figure plots incident heat fluxes obtained from the plate TC temperatures ( T PT , in K) and adjacent gas temperatures ( T gas , in K) at each time step ( i ) using Equation 3

{[{\dot{q}}_{inc}^{''}]}^{i} = σ {[T_{PT}^{4}]}^{i} + \frac{((), h + K_{PT}) ((), {[T_{gas}]}^{i} - {[T_{PT}]}^{i}) - C_{PT} \frac{{[T_{PT}]}^{i + 1} - {[T_{PT}]}^{i - 1}}{{[t]}^{i + 1} - {[t]}^{i - 1}}}{ε_{italicPT}},

where

{[{\dot{normalq}}_{inc}^{''}]}^{i}

is the incident heat flux in Watts, σ is the Stefan‐Boltzmann constant (5.670E‐8 W/m 2 /K 4 ), h is the convective heat transfer coefficient assumed to be 10 W/m 2 /K, K PT is a heat transfer coefficient due to heat losses of the plate TC assumed as 8 W/m 2 /K, C PT is the lumped heat capacity of the plate TCs assumed as 4200 J/m 2 /K, t is time (s), and ε PT is the emissivity of the plate assumed to be 0.9. The incident heat fluxes plotted indicate that the highest values are at the top of the compartment and at the center directly above the burner.…”

Section: Resultsmentioning

confidence: 99%

Fire resistance of cold‐formed steel framed shear walls under various fire scenarios

2019

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Summary This paper presents results of large‐scale experiments with varying levels of fire severity on lateral force‐resisting systems commonly used in cold‐formed steel framed buildings. Gypsum‐sheet steel composite panel sheathed walls, oriented strand board sheathed walls, and steel strap‐braced walls are examined. Postflashover fire conditions of two different intensities as well as 1 hour of fire exposure similar to that in a standard furnace qualification test are studied. Additionally, a full‐scale furnished kitchen fire experiment is conducted for comparison. The results highlight differences in the thermal response and subsequent performance of the walls as well as differing sensitives of the walls to pre‐damage, eg, that might occur during an earthquake. The results are part of a larger effort to provide fragilities for these wall systems in response to realistic fires for performance‐based design.

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“…The TSCs used in this study were similar to devices described by Ha¨ggkvist et al [21], Hidalgo et al [22], Tofilo et al [23] and Wickstro¨m [24]. TSC is a robust and cost-effective device to assess the thermal impact to the surface.…”

Section: Incident Heat Flux Measurementsmentioning

confidence: 99%

Flame Heights and Heat Transfer in Façade System Ventilation Cavities

et al. 2018

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Abstract. The design of buildings using multilayer constructions poses a challenge for fire safety and needs to be understood. Narrow air gaps and cavities are common in many constructions, e.g. ventilated fac¸ade systems. In these construction systems flames can enter the cavities and fire can spread on the interior surfaces of the cavities. An experimental program was performed to investigate the influence of the cavity width on the flame heights, the fire driven upward flow and the incident heat fluxes to the inner surfaces of the cavity. The experimental setup consisted of two parallel facing non-combustible plates (0.8 9 1.8 m) and a propane gas burner placed at one of the inner surfaces. The cavity width between the plates ranged from 0.02 m to 0.1 m and the burner heat release rate was varied from 16.5 kW to 40.4 kW per m of the burner length. At least three repeated tests were performed for each scenario. In addition, tests with a single plate were performed. The flame heights did not significantly change for Q 0 /W < 300 kW/m 2 (where Q 0 is the heat release rate per unit length of the burner and W is the cavity width). For higher Q 0 /W ratios flame extensions up to 2.2 times were observed. When the distance between the plates was reduced or the heat release rate was increased, the incident heat fluxes to the inner surface increased along the entire height of the test setup. The results can be used for analysing methodologies for predicting heat transfer and fire spread in narrow air cavities.

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Using plate thermometer measurements to calculate incident heat radiation

Cited by 36 publications

References 7 publications

Modeling of fire exposure in facade fire testing

Modeling of fire exposure in facade fire testing

Fire resistance of cold‐formed steel framed shear walls under various fire scenarios

Flame Heights and Heat Transfer in Façade System Ventilation Cavities

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