Combustion characteristics and heat release rate of vertical cable fire for sustainable energy system in an analogue underground compartment

Tao, Haowen; Zhang, Xiaochun; Guo, Zunmeng; Zeng, Wuyong; Huang, Xianjia; Zheng, Zihui; Xu, Wenbin

doi:10.1016/j.scs.2018.12.001

Cited by 17 publications

(7 citation statements)

References 22 publications

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“…In the tunnel fire, many people have done research on fire spread, fire plume characteristics, and smoke control . Previous studies have shown that toxic and harmful smoke from combustion poses a major threat to trapped and rescue workers .…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on smoke spread characteristics and smoke layer height in tunnels

Zhao

Liu

et al. 2019

Fire and Materials

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Summary A series of experiments were carried out in a model‐scale tunnel with dimension of 6.0 m × 1.0 m × 0.7 m to investigate the smoke spread behaviors and the typical smoke layer height. Alcohol was employed as fuel, and the heat release rate was set to be 9.5, 18.4, 30.1, and 63.5 kW, respectively. The temperature profile in the tunnel was measured, and the buoyant flow stratification conditions were visualized by a laser sheet. The experiment results show that the N percentage rule would greatly influence by subjective factors. As the N (10, 20, 30) value increases, the smoke layer height also increases. The results calculated by the buoyancy frequency method were more accurate. Fan's prediction method (Fan WC, Wang QG, Jiang FH. Concise Guide of Fire Science. He Fei: University of Science and Technology of China Press; 1995.161 p.) does not accurately evaluate the smoke layer thickness in tunnel fire. An enhanced empirical formula for predicting the smoke layer thickness in the one‐dimensional horizontal spread stage was proposed. It is shown that the empirical formula could well predict the smoke layer thickness by comparing with the experimental data of previous studies.

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Section: Introductionmentioning

confidence: 99%

Experimental investigation on smoke spread characteristics and smoke layer height in tunnels

Zhao

Liu

et al. 2019

Fire and Materials

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“…At present, the research on cable fires mainly focuses on the combustion characteristics of a cable. These articles describe the carrying out of experiments or numerical simulations on the propagation direction and velocity of the flame on a cable, the combustion temperature distribution, toxic gas diffusion, and other parameters, and they reveal the characteristics of cable fire [7][8][9][10][11][12][13][14]. Some experimental research studies and numerical calculations about cable failure have mainly focused on the direct fire protection of cables [15][16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Delaying the Failure Time of In-Service Cables in Trays by Using Fire-Retardant Coatings

et al. 2021

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Improving the fire resistance of the key cables connected to firefighting and safety equipment is of great importance. Based on the engineering practice of an oil storage company, this study proposes a modification scheme that entails spraying fire-retardant coatings on the outer surface of a cable tray to delay the failure times of the cables in the tray. To verify the effect, 12 specimens were processed using five kinds of fire-retardant coatings and two kinds of fire-resistant cotton to coat the cable tray. The specimens were installed in the vertical fire resistance test furnace. For the ISO 834 standard fire condition, a fire resistance test was carried out on the specimens. The data for the surface temperature and the insulation resistance of the cables in trays were collected, and the fireproof effect was analyzed. The results showed that compared with the control group, the failure time of the cable could be delayed by 1.57–14.86 times, and the thicker the fire-retardant coatings were, the better the fireproof effect was. In general, the fire protection effect of the fire-retardant coating was better than that of the fire-resistant cotton.

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“…A fire source is essential in experimental simulation. As far as we know, there are mainly four types of fire sources, including gas burner [3][4][5][6][7][8][9][10], heat radiation fire source [11][12][13][14][15][16][17][18][19][20][21], Electric heating fire source [22], and Oil pan fire source [23,24]. Although these fire sources could ignite the power cable, they could not simulate the ignition of cable fire by arc discharge.…”

Section: Introductionmentioning

confidence: 99%

Influence of Arc Size on the Ignition and Flame Propagation of Cable Fire

Chen

Zhang

et al. 2021

Energies

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Cable fire caused by arc faults is one of the essential factors threatening the safe operation of a power system. The ignition and flame propagation of cable fire dependent on the characteristics of the arc discharge is lackingin in-depth understanding at present. In this work, with the constant electric power deposited into the arc discharge, the effects of arc size on the ignition and flame propagation of 110 kV XLPE cable fire are investigated for the first time. The arc size is changed by varying the gap distance of electrodes from 1.5 cm to 2.5 cm. It is interesting to find that the larger the arc size is, the faster the cable fire is ignited and propagates, and the larger the damaged area of the sheath of the cable is. Therein, when the gap distance increases from 1.3 cm to 3.1 cm, the equivalent impedance and the length of the arc discharge increase nearly seven times and three times, respectively. However, the gas temperature of the arc decreases slightly from 2280 K to 2100 K. In addition, a 3D model of the cable fire ignited by arc discharge is computed by Pyrosim software with fire dynamic simulation (FDS) module. Simulated results show that as the arc size increases, the cable fire is ignited faster, the flame propagates both vertically and horizontally increasing significantly, which is agreed well with the experimental results. This study deepens the understanding of the cable fire ignited by arc discharge and therefore it is useful for the evaluation and prevention of cable fire.

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Combustion characteristics and heat release rate of vertical cable fire for sustainable energy system in an analogue underground compartment

Cited by 17 publications

References 22 publications

Experimental investigation on smoke spread characteristics and smoke layer height in tunnels

Experimental investigation on smoke spread characteristics and smoke layer height in tunnels

Experimental Study on Delaying the Failure Time of In-Service Cables in Trays by Using Fire-Retardant Coatings

Influence of Arc Size on the Ignition and Flame Propagation of Cable Fire

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