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Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)
Journal : Procedia Engineering, , Volume 43, 2012, Pages 569-573
The cable tunnel fire spreads rapidly, the high-temperature toxic smog accumulates, and the fire fighting is of great difficulties. Once the fire hazard occurs, serious economic losses and casualties will be caused. Through the numerical simulation of the cable tunnel fire process, and the analysis and summary of simulation results, conclusions are drawn of flue gas spread situation and the section temperature changes during the generating process of cable tunnel fires. Then the best fire fighting time is proposed, which provides references for development of fire-fighting measures and selection of the fire protection system
With rapid advancing of modernization construction of our country, the application of electrical power in industries is more and more wide, and the safety issues of electrical power transmission are also increasingly prominent. The domestic long-distance power transmission mainly relies on the high-voltage cable tray and cable tunnel, and the cable tunnel is the electrical power transmission mode in cities. However, due to the imperfectness of cable tunnel design and construction in the initial construction stage of China, in the long running, the cable tunnel environment becomes worse gradually, and the loss of the cable itself is aggravated, which leads to reduction in the cable insulation performance, increase in heating value, electric arc formed by local discharge, and other phenomena, causing frequent occurrence of cable tunnel fires. In addition, the cable tunnels are mainly used for cable laying in power stations, substations, large-scale industrial parks and urban electricity major trunk roads. Therefore the fire hazard in the cable tunnel will cause power failure in a large area as well as production halt and other secondary disasters, which brings huge losses to the whole society.
نتیجه گیری انگلیسی
Cable tunnel fire has become an important topic of electrical fire. Therefore, only by studying the cable tunnel fire process and the fire hazard spread situation and analyzing the cable tunnel fire flue gas spread and temperature change situation, can we accurately understand the fire characteristics in the actual situation, and provide more accurate and authoritative reference for formulation of fire-fighting measures in the cable tunnel and selection of fire-fighting system.