Preventing methane fires is one of the main challenges of fire safety systems in thermal power plants. The analysis of existing fire prevention systems at energy facilities demonstrated their low efficiency. It has been proposed to consider the use of thermally activated water for methane phlegmatization in case of accidental leakage in the enclosed volume of the energy industry facilities with the application of mathematical modeling.
Based on the calculations, the number of technical devices of supply for non-leak-tight rooms of various degrees has been established. When a certain coefficient of non-leak-tightness is reached, which corresponds with aquatic medium supply in metastable phase state to the open space, the number of trunks will be maximum for a given volume. It is practicable to install supply devices of water medium in metastable phase state on lateral surfaces, whereas phlegmatizing concentrations are achieved within 10 sec from the moment of supply. It has been established that the existing systems of fire prevention are not efficient enough as in some cases these may lead to the occurrence of explosive local areas. A method to prevent combustible gas fires with aquatic medium in a metastable phase state in enclosed volumes of energy facilities has been proposed and theoretically substantiated. The necessary number of technical devices to supply thermally activated water depending on the room volume and non-leak-tightness coefficient have been calculated. Using the software and hardware package Pyrosim has confirmed the correctness of performed calculations and helped to identify the optimal method of supplying aquatic medium in metastable phase state to the volume of the engine room of a thermal power plant.
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