Effects of External Heat Radiation on Combustion and Toxic Gas Release of Flame Retardant Cables

Zhang, Jia Qing; Zhang, Bo Si; Fan, Ming Hao; Wang, Liu Fang; Guo, Xiang Jun; Yu, Deng Yang

doi:10.4028/www.scientific.net/msf.898.2392

Cited by 7 publications

(3 citation statements)

References 8 publications

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“…3 Previous studies have often focused on the pyrolysis and combustion characteristics of individual electrical materials such as transformer oil and power cables. [3][4][5][6][7][8] For instance, Zhang et al 3 studied the pyrolysis characteristics and products of transformer oil and Kim et al 8 investigates the effects of aging on the combustion of cables. Regarding TIP, former researches mostly focused on the electrical characteristics such as dielectric strength 9,10 and aging characteristics, [11][12][13] rather than the pyrolysis and combustion behaviors.…”

Section: Introductionmentioning

confidence: 99%

“…TIP mainly composes of cellulose and hemicellulose while the transformer oil is a kind of petroleum liquid 3 . Previous studies have often focused on the pyrolysis and combustion characteristics of individual electrical materials such as transformer oil and power cables 3–8 . For instance, Zhang et al 3 studied the pyrolysis characteristics and products of transformer oil and Kim et al 8 investigates the effects of aging on the combustion of cables.…”

Section: Introductionmentioning

confidence: 99%

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Effect of immersion time on the combustion characteristics of oil‐impregnated transformer insulating paperboard

et al. 2022

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Transformer insulating paperboard is an insulating material commonly used in the oil-filled equipment in substations, which is usually immersed in the transformer oil.In this study, the effects of immersion time on the combustion characteristics of oil-impregnated transformer insulating paperboard are studied using the thermogravimetric, UL94 vertical flammability, and cone calorimeter experiments. The experimental results show that the total oil content increases with increasing immersion time and reaches the saturation state in 240 h, with a saturation content of 14.7% ± 0.5%. However, the distribution of oil content inside the paperboard is uneven. At the saturation state, the surface oil content is 35.5%, being about 3 times of the core oil content. The results of UL94 vertical flammability experiments show that the flame spread rate increases with increasing immersion time and is controlled by the total oil content. In the cone calorimeter experiments, the time to ignition is significantly reduced compared to the clean paperboard. Unlike the flame spread rate, the ignition time is controlled by the surface oil content and barely varies with immersion time. The critical heat flux of oil-impregnated transformer insulating paperboard is found as 3.9 kW/m 2 , being only 1/3 of clean paperboard. With increasing immersion time, the peak heat release rate increases, while the total heat release, fire growth index, and effective heat of combustion present linear correlations with the total oil content. The CO yield increases with increasing immersion time, and the released CO mainly comes from the combustion of transformer oil.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of immersion time on the combustion characteristics of oil‐impregnated transformer insulating paperboard

et al. 2022

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“…However, only the external radiation heat fluxes of 25 and 50 kW/m 2 were investigated in the analysis of the HRR and gas yields. According to related studies , the external radiation heat intensity had remarkable effects on the fire performance of combustibles. Therefore, the effects of the external radiation heat flux on the fire performances of pure and oil‐impregnated paperboard are still unclear.…”

Section: Introductionmentioning

confidence: 99%

Effects of external radiation heat flux on combustion characteristics of pure and oil‐impregnated transformer insulating paperboard

Zhang

Fan

et al. 2017

Process Safety Progress

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The effects of external radiation heat flux on the combustion characteristics of pure transformer insulating paperboard (PTIP) and oil‐impregnated transformer insulating paperboard (OITIP) were investigated experimentally. The experiments were conducted with the cone calorimeter using five external radiation heat fluxes that ranged from 25 to 80 kW/m2. The results showed that the ignition time decreased with the external radiation heat flux, and the ignition time of PTIP was much longer than that of OITIP. Both the PTIP and OITIP are thermal thick materials, and the critical radiation heat flux of the PTIP was larger than that of the OITIP. For the PTIP, the peak of the heat release rate (HRR) and toxic gas productions had no significant difference, while those of the OITIP increased with the external radiation heat flux. The HRR peak of the PTIP was larger than that of the OITIP with the external radiation heat fluxes of 25, 35, 50, and 65 kW/m2. When the radiation heat flux increased to 80 kW/m2, the HRR peak of the OITIP became higher. From the perspective of the CO production rate, the hazard of PTIP fires was more severe than that of OITIP fires under the external radiation heat fluxes of 25 and 35 kW/m2. The CO production rate of the PITP was lower than that of the OITP with the high external radiation heat fluxes of 50, 65 and 80 kW/m2. © 2017 American Institute of Chemical Engineers Process Process Saf Prog 37:362–368, 2018

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Fire Performance Analysis of PVC and Cabtyre Cables Based upon the Ignition Characteristics and Fire Growth Indexes

Zhang

et al. 2018

Advanced Functional Materials

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Effects of External Heat Radiation on Combustion and Toxic Gas Release of Flame Retardant Cables

Cited by 7 publications

References 8 publications

Effect of immersion time on the combustion characteristics of oil‐impregnated transformer insulating paperboard

Effect of immersion time on the combustion characteristics of oil‐impregnated transformer insulating paperboard

Effects of external radiation heat flux on combustion characteristics of pure and oil‐impregnated transformer insulating paperboard

Fire Performance Analysis of PVC and Cabtyre Cables Based upon the Ignition Characteristics and Fire Growth Indexes

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