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Purpose. Theoretical studies have established that one of the ways to increase the extinguishing efficiency of temperature-activated water (TAW) is by incorporating water-soluble inhibitory compounds into it. However, the process modeling of flooding fires of closed volumes by this medium and field experiments confirming the theoretical conclusions have not been carried out. The work aims at field research of flooding fires by TAW with inhibitory salts. For this purpose, the following tasks have been solved: – mathematical modeling of evaporation process of TAW droplets in a high-temperature environment; – field research of flooding by TAW with incorporation of inhibitory salts into it. Methods. Analysis and synthesis methods have been used to evaluate the available data. The theory of branched-chain combustion processes has been used to study flame inhibition processes. The objectivity of the theoretical dependencies found has been confirmed by the experimental method. Findings. The experiments have been carried out in a room with enclosing structures made of non-combustible materials. The room volume is 300 m3 with a total leakage parameter for a group of rooms of 0.012 m–1. To create TAW jets with inhibitory properties, a dosing device has been chosen that allows creating TAW jets with inhibitory salts mass concentration up to 18 %. In the first series of experiments extinguishment has been carried out by TAW without adding inhibitory salts. In the second series of experiments TAW jets have been used for extinguishing at the temperature of 140 °C of underheated water and a 10 % concentration of potassium hexacyanoferrate (II) to achieve inhibitory effect. The suppression time of fire seats by TAW jets with inhibitory substances dosing has turned out to be 1.5 times less, while the supply intensity has been 1.07 times higher. The method of total flooding effectiveness is confirmed by low specific volume consumption for extinguishing. The field research results correlate well with mathematical modeling results (the discrepancy is not more than 15 %), which allows verifying the model and using it in further research. Research application field. The obtained empirical dependences can be used to increase the efficiency of flame burning suppression in a closed volume. The research results will allow forming a theoretical basis for describing the mechanisms of blocking radical flame reactions by TAW with inhibitory properties. Conclusions. Based on experimentally established data and theoretical results, it can be argued that efficiency of total flooding by TAW jets when dosing inhibitory salts of appropriate concentrations increases by at least 1.5 times, and the combustion zone cooling efficiency by at least 1.6 times. The field research has allowed confirming the objectivity of theoretical dependencies found. The most effective distribution of TAW polydisperse droplet phase has been determined to create inhibitory properties. The dependencies of temperature decrease in a closed volume on extinguishing time have been found.

Introduction. The article analyzes the composition of power plants of gas compressor stations. A structural and logical model of the development of fires at power plants of gas compressor stations is compiled based on the analysis of real fires. The most dangerous scenario of fire development has been determined. On the basis of the branched-chain combustion theory, the necessary characteristics of the fire extinguishing composition are established and a technical scheme for implementing the fire extinguishing method is proposed. The purpose of the study is to creation of conditions for effective fire extinguishing of power installations of gas compressor stations. Research methods. To get the results used general scientific and special methods of scientific knowledge-analysis, synthesis, the theory of the branched-chain combustion process, the theory of thermal combustion. The results of the study. The most dangerous scenario of fire development of power installations of gas compressor stations is established. The effective characteristics of the extinguishing agent for fire extinguishing are determined on the basis of the branched-chain combustion theory. The technical implementation of this method of fire extinguishing is proposed. Conclusion. The compiled structural and logical model of the development of fires at power plants of gas compressor stations can be used by fire and rescue units when conducting operational and tactical measures. The technical implementation of the proposed method of fire extinguishing will increase the efficiency of volumetric fire extinguishing both at power plants of gas compressor stations and when extinguishing fires of thermodynamically stable liquids. Keywords: energy facilities, branched-chain process, gas compressor stations, closed spaces, volumetric fire fighting, chemical inhibition. Acknowledgments: the research is supported by the Innovation Assistance Fund under the agreement no. 15204GU / 2020 dated 05.06.2020.

Introduction. The article considers the experience of application and aspects of improving temperature activated water technology for extinguishing fires as well as preventing and eliminating accidents. The technology for generating temperature activated water is described. The areas of the technology application have been explored. The advantages, disadvantages and some aspects of the technology improvement are presented. The purpose of the study is increasing efficiency of fire extinguishing and emergency prevention via using temperature activated water technology. Development of new technical means for supplying temperature activated water and fire extinguishing agents based on it. Research methods. To obtain the results, general scientific methods of cognition were used – analysis, synthesis, the theory of water boiling and hydro-gas dynamics. Reliability of the results presented in the given work is confirmed by application of the fundamental laws of physics and the proper mathematical tools. The results of the study. The advantages, disadvantages and some aspects of technology improvement are presented. It was explored that temperature activated water in a suspended state is able to dilute and cool the combustible medium and displace the oxygen of the air in enclosures, thereby eliminating the fire. The supply of hot water through hose lines over long distances (no more than 2 km) without loss of quality properties makes it possible to use the technology when extinguishing fires in hard-to-reach places. Low water consumption for extinguishing fires (up to 40 minutes without refueling) has a positive effect on extinguishing fires under conditions of limited water supply. The results of scientific research have been introduced into new models of appliances capable of performing a huge range of tasks set by EMERCOM of Russia. Conclusion. The information presented in the given publication will help managers and users of the technical means based on the temperature-activated water technology to apply and use it correctly for extinguishing fires and eliminating emergencies. The article discusses new aspects of the application, which allow us to suggest the possibility of extinguish fires, preventing and eliminating accidents in underground mine workings, subsurface suppression of municipal solid waste landfills, and extinguishing live electrical installations with temperature-activated water. The main directions for improving the technology are development and creation of new technical means for generating and supplying temperature-activated water and fire extinguishing agents based on it, as well as the study of its application at various protection facilities, including those located in the Arctic zone of the Russian Federation. Keywords: temperature activated water, explosive water boiling, fire extinguishing agent, fire extinguishing, fire appliances, multi-purpose fire appliance, multi-functional spray installation, set of multi-purpose fire containers.