Affiliation:
1. Jiangsu Key Laboratory of Fire Safety in Urban Underground Space China University of Mining and Technology Xuzhou China
2. Key Laboratory of Gas and Fire Control for Coal Mines China University of Mining and Technology, Ministry of Education Xuzhou China
Abstract
AbstractOptical 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.
Funder
National Natural Science Foundation of China
Subject
Metals and Alloys,Polymers and Plastics,General Chemistry,Ceramics and Composites,Electronic, Optical and Magnetic Materials
Cited by
1 articles.
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