Experimental study on fire performance of optical cables used in utility tunnel: Influence of cable spacing and heat flux

IF 2 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Fire and Materials Pub Date : 2023-02-14 DOI:10.1002/fam.3132
Weiguang An, Xiaoxiao Sun, Yanhua Tang, Tao Wang, Zhe Wang
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引用次数: 1

Abstract

Optical cable is an important part of modern telecommunications infrastructure. In this study, cone calorimeter experiments are conducted on the optical cables which are widely being applied in utility tunnels in China. The coupling effect of the spacing between optical cables (8, 10, 12, 15 mm) and the heat flux (30, 40, 50 kW/m2) on fire performance of optical cables is studied. It is highlighted that the optical cables conform to the ignition time model of the thermally thin material. The ignition time of the optical cables decreases when increasing the heat flux. When the heat flux is 30 kW/m2, the ignition time of the optical cable with different spacing varies greatly. When the heat flux is greater than 30 kW/m2, the difference in the ignition time between the optical cable samples with different spacing is small. Furthermore, the average mass loss rate of the optical cables increases when increasing either the heat flux or the spacing between optical cables. The heat release rate of the optical cables also increases when increasing either the heat flux or the spacing between optical cables. The curves of the heat release rate versus time show two peaks, the second one being significantly smaller.

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公用工程隧道光缆防火性能的试验研究:电缆间距和热通量的影响
光缆是现代电信基础设施的重要组成部分。在本研究中,对我国广泛应用于公用工程隧道的光缆进行了锥形量热计实验。光缆(8、10、12、15)之间的间距的耦合效应 mm)和热通量(30、40、50 kW/m2)对光缆耐火性能的影响。值得强调的是,光缆符合热薄材料的点火时间模型。随着热通量的增加,光缆的点火时间减少。当热通量为30时 kW/m2,不同间距的光缆的点火时间变化很大。当热通量大于30 kW/m2,具有不同间距的光缆样品之间的点火时间差异较小。此外,当热通量或光缆之间的间距增加时,光缆的平均质量损失率增加。当增加热通量或增加光缆之间的间距时,光缆的热释放速率也增加。热释放速率随时间的曲线显示出两个峰值,第二个峰值明显较小。
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来源期刊
Fire and Materials
Fire and Materials 工程技术-材料科学:综合
CiteScore
4.60
自引率
5.30%
发文量
72
审稿时长
3 months
期刊介绍: Fire and Materials is an international journal for scientific and technological communications directed at the fire properties of materials and the products into which they are made. This covers all aspects of the polymer field and the end uses where polymers find application; the important developments in the fields of natural products - wood and cellulosics; non-polymeric materials - metals and ceramics; as well as the chemistry and industrial applications of fire retardant chemicals. Contributions will be particularly welcomed on heat release; properties of combustion products - smoke opacity, toxicity and corrosivity; modelling and testing.
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