scholarly journals Experimental Study on Occurrence Limit Heat Release Rate of Flashover in a Building Fire

2021 ◽  
Vol 21 (2) ◽  
pp. 65-71
Author(s):  
Seunggoo Kang ◽  
Yi Chul Shin
Keyword(s):  
Experimental Study ◽  
Heat Release ◽  
Heat Release Rate ◽  
Release Rate ◽  
Large Scale ◽  
Fire Behavior ◽  
Design Calculation ◽  
Building Fire ◽  
Fire Source ◽  
Combustion Tests

In this study, to allow the flashover to occur, combustion tests were conducted by setting the conditions of a fire source using a large-scale compartment and changing the opening condition. As a result, the inside temperature of the compartment was measured under the fire source conditions. Moreover, according to the “Handbook on Design Calculation &#x0004d;ethods of Fire Behavior” by the Architectural Institute of Japan, the validity of the heat release rate required for the flashover to occur was verified through the correlation between <math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>Q</mi><mrow><mi>F</mi><mi>O</mi></mrow></msub><mo>/</mo><msub><mi>Q</mi><mrow><mi>v</mi><mi>m</mi><mi>a</mi><mi>x</mi></mrow></msub></math> and <math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>A</mi><mi>T</mi></msub><msup><mrow><mo>(</mo><mi>k</mi><mi>p</mi><mi>c</mi><mo>)</mo></mrow><mrow><mn>1</mn><mo>/</mo><mn>2</mn></mrow></msup><mo>/</mo><msub><mi>c</mi><mrow><mi>P</mi></mrow></msub><mn>0</mn><mo>.</mo><mn>5</mn><mi>A</mi><msup><mi>H</mi><mrow><mn>1</mn><mo>/</mo><mn>2</mn></mrow></msup></math>.

Transient Plume Influence in Measurement of Convective Heat Release Rates of Fast-Growing Fires Using a Large-Scale Fire Products Collector

1990 ◽  
Vol 112 (1) ◽  
pp. 186-191 ◽  
Author(s):  
Hong-Zeng Yu
Keyword(s):  
Heat Flow ◽  
Heat Release ◽  
Convective Heat ◽  
Heat Release Rate ◽  
Release Rate ◽  
Large Scale ◽  
Release Rates ◽  
Fast Growing ◽  
Fire Source ◽  
Rack Storage

A theory for strongly buoyant transient plumes was used to determine whether the convective heat flow measured by a large-scale Fire Products Collector (FPC) could approximate the instantaneous convective heat release rate generated by fast-growing fires. The theory was confirmed by the plume data of rack storage fires obtained in this study. The theory provides a scheme for deriving the convective heat release rate generated at the fire source from the convective heat flow measured by the FPC.

440 A study of fire behavior in a compartment with an activation of fire suppression system : Part2 Outline of additional experiment and heat release rate

2005 ◽  
Vol 2005.2 (0) ◽  
pp. 345-346
Author(s):  
Tomoaki NAKAO ◽  
Yoshinao TAKAHASHI ◽  
Fumio TAKASE ◽  
Shinichi SUGAHARA ◽  
Masahiro MORITA ◽  
...  
Keyword(s):  
Heat Release ◽  
Heat Release Rate ◽  
Release Rate ◽  
Fire Suppression ◽  
Fire Behavior ◽  
Additional Experiment ◽  
Suppression System

Experimental Study on Variation of Gas and Heating Capacity about a Combustible Organic Rock

2014 ◽  
Vol 962-965 ◽  
pp. 1025-1028
Author(s):  
Xiao Feng Ma
Keyword(s):  
Experimental Study ◽  
Heat Release ◽  
Heat Release Rate ◽  
Release Rate ◽  
Production Rates ◽  
Organic Sample ◽  
Heating Capacity

the paper determines and calculates variation of gas and heating capacity in a combustible organic rock, the experiment shows that organic sample radiating intensity is low when temperature is below 110 °C, it gradually increased more than 110 °C when the heat release rate increases considerably. the speed of CO and CO2production rates increased slowly nevertheless the temperature is up to 65°C and raised faster and finally enhanced dramatically. Organic rock combustion can be inhibited effectively by lowering the temperature and reduce Organic Rock oxidation velocity.

Numerical Simulation on Ghosting Fire in the Confined Underground Space

2014 ◽  
Vol 580-583 ◽  
pp. 2667-2670
Author(s):  
Pei Hong Zhang ◽  
Xiao Wei Lu ◽  
Xiao Ming Zhang
Keyword(s):  
Heat Release ◽  
Heat Release Rate ◽  
Release Rate ◽  
Source Area ◽  
Confined Space ◽  
Source Areas ◽  
Fire Source ◽  
Underground Fire ◽  
Two Parameters ◽  
Air Vent

The phenomenon of ghosting fire development in underground confined space is simulated to analyze the impacts of ghosting fire generation via some conditions -- different air vent sizes and different fire source areas. FDS is used to establish a physical model of underground fire laboratory in Northeastern University, the simulation is conducted by setting two parameters, the air vent size and the fire source area. The fire heat release rate, temperature, concentration of CO, O2 are measured to analyze the case of ghosting fire generation in underground confined space with different air vent sizes and different fire source areas. It’s most likely to generate ghosting fire when the simulating parameter is that the air vent size is 0.4m × 0.4m and the fire source area is 0.96m2. The conclusion is that increasing the air vent size is not a simple ascending and descending relationship with the occurrence time and duration time of the ghosting fire. Increasing the fire source area can improve the fire heat release rate effectively, and promote the formation of ghosting fire.

Experimental Study on Effect of Ceiling on Upward Flame Spread over Poly(Methyl Methacrylate) Sheets

2016 ◽  
Vol 705 ◽  
pp. 114-118 ◽  
Author(s):  
Fei Peng ◽  
Li Zhong Yang ◽  
Xiao Dong Zhou
Keyword(s):  
Experimental Study ◽  
Heat Release ◽  
Heat Release Rate ◽  
Flame Spread ◽  
Release Rate ◽  
Unit Area ◽  
Sample Length ◽  
Upward Flame Spread ◽  
Series Of Experiments ◽  
Sample Width

A series of experiments was designed to investigate the effects of ceiling on upward flame spread. The result reveals that the ceiling accelerates the burning rate of upward flame under certain situations. And the acceleration is slightly increase with the increasing sample length, but almost keeps the same with different sample width. The heat release rate per unit area nearly keeps the same for the series work with ceiling or the series work without ceiling. But the heat release rate per unit area between the two series is obvious, the heat release rate per unit area with ceiling is much higher than the ones without ceiling.

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