Assessment of the Impact of Burning Cable Lines in Cable Ducts on the Temperature of Enclosing Structures of Buildings and Facilities

Every year, the number of fires caused by cables and wires is growing. Burning of cables is accompanied by active emission of heat and toxic products. The analysis of scientific papers and tests has shown that the conductor's shape, the number of cable cores, the insulation material, the number of conductors, and their packing density affect this process. The study considers the impact of burning cable lines in cable ducts on the temperature of enclosing structures of a building in a standard temperature mode. For these purposes, fire tests and modeling have been conducted in the ANSYS software package. Experimental units involved in tests have different structures, which helped estimate the heating of adjacent building structures in various conditions of the tests. The goal of the calculation has been to model the thermal impact on enclosing structures when a heat source is located immediately inside the duct. The results of modeling have shown a significant thermal impact on enclosing structures where the temperature of the partition surface exceeded 600 °С. The obtained results can be used, inter alia, for studies aimed at the assessment of the efficiency of fire-protective coatings of various mechanisms of action.