Temperature Correlations For Forced-ventilated Compartment Fires

Foote, K.L.; Pagni, Patrick J.; Alvares, N.J.

doi:10.3801/iafss.fss.1-139

Cited by 48 publications

(21 citation statements)

References 11 publications

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“…where Figure 4 shows a comparison of the measured average temperature rise throughout the compartment for the closed compartments with no ventilation [5] and the predicted temperature rise using Equation 4. The temperature rise is correlated well by the method, though there is a general tendency to underpredict the temperature rise.…”

Section: Modeling Of the Fire Thermal Envffionmentmentioning

confidence: 99%

“…In fires in completely closed, unventilated compartments, Equation 4 can be used to provide estimates of the compartment temperatures.…”

Section: Modeling Of the Fire Thermal Envffionmentmentioning

confidence: 99%

“…Relatively few forced ventilation compartment fire experiments have been performed. Of the forced ventilation compartment fire experiments, the earlier work focused on forced ventilation provided at the base of the compartment [3,4]. Only relatively recently have overhead forced ventilation compartment fires been studied experimentally [5,6].…”

Section: Introductionmentioning

confidence: 99%

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Analysis Of Compartment Fires With Overhead Forced Ventilation

Beyler¹

1991

Fire Saf. Sci.

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Compartment fire data with either no ventilation or forced overhead ventilation are successfully modeled as well-stirred fire environments rather than two-layer fire environments, The extinction of flames is predicted using the limiting oxygen index concept linked with a well-stirred model of the fire environment. While the fire environment in compartments with overhead ventilation is quite different than naturally-ventilated fires or fires ventilated from floor level, a temperature model previously developed by Beyler and Deal is shown to predict preflashover temperatures in forced ventilation fires.

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Section: Modeling Of the Fire Thermal Envffionmentmentioning

confidence: 99%

“…In fires in completely closed, unventilated compartments, Equation 4 can be used to provide estimates of the compartment temperatures.…”

Section: Modeling Of the Fire Thermal Envffionmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analysis Of Compartment Fires With Overhead Forced Ventilation

Beyler¹

1991

Fire Saf. Sci.

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“…[1][2][3][4][5][6][7][8][9][10][11]), whereas fewer studies have focused on mechanically-ventilated room fires (e.g. [12][13][14][15][16][17]). The latter configuration is particularly relevant for the nuclear industry where compartments are generally sealed from one another and connected through a ventilation network.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Burning Rate of Liquid Fuels in Confined and Mechanically-Ventilated Compartments using a Well-Stirred Reactor Approach

Beji

Merci

2014

Fire Technol

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The objective of this work is to provide a 'support tool' to assess the burning rate of a pool fire in a well-confined and mechanically-ventilated room using a single-zone model based on conservation equations for mass, energy and oxygen concentration. Such configurations are particularly relevant for nuclear facilities where compartments are generally sealed from one another and connected through a ventilation network. The burning rates are substantially affected by the dynamic interaction between the fuel mass loss rate and the rate of air supplied by mechanical ventilation. The fuel mass loss rate is controlled by (i) the amount of oxygen available in the room (i.e. vitiation oxygen effect) and (ii) the thermal enhancement via radiative feedback from the hot gas to the fuel surface. The steady-state burning rate is determined by the 'interplay' and balance between the limiting effect of oxygen vitiation and the enhancing effect of radiative feedback. An extensive sensitivity study over a wide range of fuel areas and mechanical ventilation rates shows that a maximum burning rate may be obtained.

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“…From published equations involving the ventilation factor of door openings [8,9,14,15], it can be made out that the likelihood of flashover decreases with the increase of ventilation factor because the minimum heat release rate and critical mass burning rate or critical fuel area for flashover increase, but the temperature of hot gas layer decreases. This can be simply explained as: an increase of ventilation factor is unfavorable to the transition from the fuel-to vent-controlled fires in an enclosure, as it leads to the increase of cool air flow entering the enclosure.…”

Section: Introductionmentioning

confidence: 99%

Studies of the combined effects of some important factors on the likelihood of flashover

2011

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SUMMARYAmong those factors that affect the likelihood of flashover in enclosure fires, the thermal inertia of lining materials, ventilation factor of door openings, heat release rate of fuel, and internal dimensions of the enclosure are the most important. The effects of the four factors are related, so it is very necessary to study their combined effects. In the present study, based on analyzing the approximate heat balance on the control volume similar to that in the MQH method, a dimensional relationship was derived that facilitates the estimation of pre-flashover temperatures, which is used in the popular guidance literature as the key parameters for practical methods of predicting flashover. By correlating a vast amount of data gained in both small-scale and large-scale enclosure fire experiments, an important equation was obtained, which can embody explicitly and quantitatively the combined effects of the four important factors on the likelihood of flashover. According to the temperature criteria of 600 • C identifying flashover, a new 'combined method of predicting flashover' was put forward. The validity of the method was verified in small-scale experiments, and the results showed that it could be applied to predict well whether flashover occurs in enclosure fires or not.

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Temperature Correlations For Forced-ventilated Compartment Fires

Cited by 48 publications

References 11 publications

Analysis Of Compartment Fires With Overhead Forced Ventilation

Analysis Of Compartment Fires With Overhead Forced Ventilation

Assessment of the Burning Rate of Liquid Fuels in Confined and Mechanically-Ventilated Compartments using a Well-Stirred Reactor Approach

Studies of the combined effects of some important factors on the likelihood of flashover

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